UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21080 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Convertible Opportunities and Income Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 1111 East Warrenville Road, Naperville, Illinois 60563 NAME AND ADDRESS OF AGENT FOR SERVICE: James S. Hamman, Jr., Secretary, Calamos Asset Management, Inc., 1111 East Warrenville Road, Naperville, Illinois 60563-1493 REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (630) 245-7200 DATE OF FISCAL YEAR END: October 31, 2004 DATE OF REPORTING PERIOD: November 1, 2003 through April 30, 2004 Item 1. Reports to Stockholders CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SEMI-ANNUAL REPORT APRIL 30, 2004 [CALAMOS INVESTMENTS LOGO] Strategies for Serious Money(R) CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- CORPORATE BONDS (86.6%) BASIC INDUSTRIES (10.4%) $ 7,452,000 Boise Cascade Corp.(c) 7.000%, 11/01/13 $ 7,859,744 6,624,000 Buckeye Technologies Inc.(c) 8.500%, 10/01/13 7,087,680 4,140,000 Equistar Chemicals, LP(c) 10.625%, 05/01/11 4,657,500 7,096,000 Freeport-McMoRan Copper & Gold, Inc.(c) 10.125%, 02/01/10 7,841,080 1,449,000 FMC Corp. 10.250%, 11/01/09 1,717,065 14,076,000 Georgia-Pacific Corp.(c) 8.125%, 05/15/11 15,941,070 6,173,000 IPSCO, Inc.(c) 8.750%, 06/01/13 6,944,625 4,554,000 Ispat International(a)(c) 9.750%, 04/01/14 4,667,850 1,913,000 Jarden Corp. 9.750%, 05/01/12 2,161,690 3,726,000 Pope & Talbot, Inc. 8.375%, 06/01/13 3,875,040 6,624,000 Sealed Air Corp.(a) 6.875%, 07/15/33 6,870,837 1,656,000 Shaw Group, Inc.(c) 10.750%, 03/15/10 1,713,960 Steel Dynamics, Inc. 1,656,000 9.500%, 03/15/09(a) 1,858,860 2,484,000 9.500%, 03/15/09(c) 2,788,290 Union Carbide Corp. 2,567,000 7.875%, 04/01/23(c) 2,489,990 3,312,000 7.500%, 06/01/25(c) 3,113,280 1,656,000 6.700%, 04/01/09(c) 1,680,840 -------------- 83,269,401 -------------- CAPITAL GOODS - INDUSTRIAL (3.9%) 4,140,000 General Motors Corp.(c) 8.250%, 07/15/23 4,441,504 4,968,000 Hutchison Whampoa International, Ltd.(a)(c) 6.250%, 01/24/14 4,885,273 1,987,000 IMCO Recycling Inc. 10.375%, 10/15/10 2,131,058 2,484,000 Jacuzzi Brands, Inc. 9.625%, 07/01/10 2,794,500 JLG Industries, Inc.(c) 828,000 8.375%, 06/15/12 861,120 3,726,000 8.250%, 05/01/08 4,061,340 4,140,000 Navistar International Corp.(c) 8.000%, 02/01/08 4,274,550 7,452,000 Terex Corp.(a) 7.375%, 01/15/14 7,805,970 -------------- 31,255,315 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- CAPITAL GOODS - TECHNOLOGY (8.5%) $ 10,764,000 Avnet, Inc.(c) 9.750%, 02/15/08 $ 12,432,420 10,350,000 EUR FIMEP, SA 11.000%, 02/15/13 14,856,839 4,140,000 Flextronics International, Ltd.(c) 6.500%, 05/15/13 4,212,450 2,815,000 Monitronics International Inc.(a) 11.750%, 09/01/10 3,026,125 915,000 Orbital Sciences Corp. 9.000%, 07/15/11 1,006,500 9,108,000 Rayovac Corp.(c) 8.500%, 10/01/13 9,791,100 8,653,000 Sanmina-SCI Corp. 10.375%, 01/15/10 10,167,275 4,057,000 Stoneridge, Inc. 11.500%, 05/01/12 4,868,400 1,656,000 Stratus Technologies, Inc.(a) 10.375%, 12/01/08 1,656,000 5,796,000 Xerox Corp. 7.625%, 06/15/13 5,940,900 -------------- 67,958,009 -------------- CONSUMER CYCLICAL (21.0%) 4,140,000 American Airlines, Inc.(a) 7.250%, 02/05/09 4,041,675 7,618,000 Aztar Corp.(c) 8.875%, 05/15/07 7,903,675 6,599,000 GBP EMI Group PLC 9.750%, 5/20/08 12,627,477 1,904,000 Fedders Corp.(a) 9.875%, 03/01/14 1,856,400 1,656,000 Global Cash Access LLC(a) 8.750%, 3/15/12 1,730,520 3,312,000 Imax Corp.(a) 9.625%, 12/01/10 3,361,680 14,283,000 Intrawest Corp. 10.500%, 02/01/10 15,675,593 11,592,000 Isle of Capri Casinos, Inc. 9.000%, 03/15/12 13,127,940 7,535,000 La Quinta Corp. 8.875%, 03/15/11 8,401,525 14,490,000 Mandalay Resort Group(c) 10.250%, 08/01/07 16,917,075 3,726,000 Oxford Industries, Inc.(a) 8.875%, 06/01/11 3,996,135 4,140,000 Phillips-Van Heusen Corp. 8.125%, 05/01/13 4,367,700 2,360,000 RH Donnelley Financial Corp.(a) 10.875%, 12/15/12 2,820,200 10,847,000 Royal Caribbean Cruises, Ltd.(c) 8.750%, 02/02/11 12,284,227 12,834,000 Russell Corp. 9.250%, 05/01/10 13,539,870 16,312,000 Saks, Inc.(c) 8.250%, 11/15/08 18,065,540 See accompanying Notes to Schedule of Investments. 1 CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- $ 2,401,000 The Gap, Inc.(c) 10.550%, 12/15/08 $ 2,965,235 4,140,000 The Interpublic Group of Companies, Inc.(c) 7.250%, 8/15/11 4,420,887 9,936,000 United Rentals, Inc.(a)(c) 7.000%, 02/15/14 9,290,160 10,516,000 Vail Resorts, Inc.(a) 6.750%, 02/15/14 10,358,260 -------------- 167,751,774 -------------- CONSUMER GROWTH STAPLES (10.9%) 6,624,000 AOL Time Warner 7.625%, 04/15/31 7,270,993 1,863,000 Alpharma, Inc.(a)(c) 8.625%, 05/01/11 1,965,465 8,280,000 American Greetings Corp.(c) 11.750%, 07/15/08 9,729,000 3,395,000 AmeriPath, Inc.(c) 10.500%, 04/01/13 3,496,850 6,997,000 Bausch & Lomb, Inc. 7.125%, 08/01/28 7,065,522 828,000 CanWest Media, Inc. 7.625%, 04/15/13 885,960 Charter Communications Inc. 2,070,000 11.125%, 01/15/11 1,831,950 3,312,000 9.625%, 11/15/09 2,831,760 6,210,000 Charter Communications Holdings LLC 10.000%, 04/01/09 5,387,175 4,140,000 Chattem, Inc.(a) 7.000%, 03/01/14 4,057,200 2,484,000 Curative Health Services, Inc.(a) 10.750%, 05/01/11 2,505,735 4,140,000 DEX Media, Inc.(a)(c) 8.000%, 11/15/13 4,036,500 3,312,000 Hasbro, Inc. 6.600%, 07/15/28 3,196,080 4,720,000 Mariner Health Care, Inc.(a)(c) 8.250%, 12/15/13 4,790,800 4,637,000 Playtex Products, Inc.(a)(c) 8.000%, 03/01/11 4,892,035 5,382,000 Quintiles Transnational Corp.(a) 10.000%, 10/01/13 5,597,280 4,140,000 Rite Aid Corp.(c) 9.250%, 06/01/13 4,409,100 8,280,000 Spanish Broadcasting Systems, Inc. 9.625%, 11/01/09 8,797,500 1,656,000 The Reader's Digest Association, Inc.(a)(c) 6.500%, 03/01/11 1,680,840 2,484,000 Valeant Pharmaceuticals International(a) 7.000%, 12/15/11 2,533,680 -------------- 86,961,425 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- CONSUMER STAPLES (4.6%) $ 3,478,000 Del Monte Foods Company 8.625%, 12/15/12 $ 3,860,580 4,968,000 DIMON, Inc.(c) 7.750%, 06/01/13 4,881,060 Dole Food Company, Inc. 3,312,000 8.625%, 05/01/09 3,560,400 7,452,000 7.250%, 06/15/10(c) 7,545,150 4,968,000 Pinnacle Foods Holding Corp.(a)(c) 8.250%, 12/01/13 5,210,190 8,280,000 Smithfield Foods, Inc. 7.750%, 05/15/13 8,983,800 2,484,000 United Agri Products(a) 8.250%, 12/15/11 2,825,550 -------------- 36,866,730 -------------- CREDIT CYCLICAL (6.0%) 10,764,000 Beazer Homes USA, Inc. 8.375%, 04/15/12 11,705,850 6,603,000 Hovnanian Enterprises, Inc.(c) 7.750%, 05/15/13 6,817,598 7,700,000 Standard Pacific Corp.(c) 9.500%, 09/15/10 8,527,750 6,997,000 Texas Industries, Inc.(c) 10.250%, 06/15/11 7,976,580 7,038,000 WCI Communities, Inc.(c) 7.875%, 10/01/13 7,389,900 4,451,000 EUR Waterford Wedgwood, PLC(a) 9.875%, 12/01/10 5,388,768 -------------- 47,806,446 -------------- ENERGY (10.0%) Chesapeake Energy Corp. 3,312,000 6.875%, 01/15/16(a)(c) 3,378,240 3,726,000 6.875%, 01/15/16(c) 3,800,520 4,554,000 Comstock Resources, Inc. 6.875%, 03/01/12 4,485,690 Forest Oil Corp. 2,484,000 8.000%, 12/15/11(c) 2,757,240 1,656,000 8.000%, 06/15/08 1,821,600 6,624,000 Giant Industries, Inc. 11.000%, 05/15/12 7,452,000 3,809,000 KCS Energy, Inc.(a) 7.125%, 04/01/12 3,828,045 4,554,000 Newfield Exploration Company(c) 8.375%, 08/15/12 5,054,940 4,968,000 Paramount Resources, Ltd. 7.875%, 11/01/10 4,943,160 9,357,000 Petrobras International Finance Company(c) 8.375%, 12/10/18 8,842,365 4,140,000 Plains All American Pipeline, LP(c) 7.750%, 10/15/12 4,746,651 2 See accompanying Notes to Schedule of Investments. CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- Premcor, Inc.(c) $ 5,299,000 9.500%, 02/01/13 $ 6,093,850 2,256,000 7.500%, 06/15/15 2,391,360 1,656,000 Swift Energy Company 9.375%, 05/01/12 1,846,440 Tesoro Petroleum Corp. 4,401,000 9.625%, 04/01/12(c) 4,984,133 1,656,000 9.000%, 07/01/08(c) 1,726,380 828,000 8.000%, 04/15/08 896,310 2,795,000 Tom Brown, Inc. 7.250%, 09/15/13 3,186,300 7,038,000 Western Gas Resources, Inc. 10.000%, 06/15/09 7,425,090 -------------- 79,660,314 -------------- FINANCIAL (3.7%) 7,700,000 Host Marriott Corp.(c) 9.500%, 01/15/07 8,585,500 6,210,000 Leucadia National Corp.(c) 7.000%, 08/15/13 6,365,250 9,108,000 LNR Property Corp. 7.250%, 10/15/13 9,244,620 1,408,000 OMEGA Healthcare Investors, Inc.(a) 7.000%, 04/01/14 1,443,200 3,229,000 Senior Housing Property Trust 7.875%, 04/15/15 3,438,885 -------------- 29,077,455 -------------- TELECOMMUNICATIONS (3.0%) 4,947,000 Avaya, Inc. 11.125%, 04/01/09 5,862,195 4,554,000 DIRECTV, Inc.(c) 8.375%, 03/15/13 5,111,865 5,382,000 General Cable Corp.(a) 9.500%, 11/15/10 5,920,200 1,656,000 iPCS, Escrow Company(a) 11.500%, 05/01/12 1,689,120 5,548,000 Primus Telecommunications Group, Inc.(a)(c) 8.000%, 01/15/14 5,131,900 -------------- 23,715,280 -------------- TRANSPORTATION (2.5%) 2,484,000 GATX Corp.(c) 8.875%, 06/01/09 2,835,441 9,688,000 General Maritime Corp.(c) 10.000%, 03/15/13 10,947,440 5,299,000 Laidlaw Global Securities, Inc.(a) 10.750%, 06/15/11 5,974,623 -------------- 19,757,504 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- UTILITIES (2.1%) $ 2,484,000 Calpine Canada Energy Finance, ULC(c) 8.500%, 05/01/08 $ 1,763,640 Calpine Corp.(c) 8,280,000 8.500%, 02/15/11 5,837,400 7,452,000 7.750%, 04/15/09 5,197,770 1,242,000 Communications & Power Industries, Inc.(a) 8.000%, 02/01/12 1,273,050 2,484,000 NRG Energy, Inc.(a)(c) 8.000%, 12/15/13 2,515,050 -------------- 16,586,910 -------------- TOTAL CORPORATE BONDS (Cost $652,376,254) 690,666,563 ============== CONVERTIBLE BONDS (16.2%) CAPITAL GOODS - INDUSTRIAL (1.7%) 13,500,000 Standard Motor Products, Inc. 6.750%, 07/15/09 13,297,500 -------------- CAPITAL GOODS - TECHNOLOGY (3.3%) 6,500,000 ASML Holding, NV 5.750%, 10/15/06 7,556,250 11,000,000 Advanced Micro Devices, Inc.(c) 4.750%, 02/01/22 11,206,250 7,562,000 Richardson Electronics, Ltd.(c) 8.250%, 06/15/06 7,467,475 -------------- 26,229,975 -------------- CONSUMER CYCLICAL (2.0%) 30,000,000 Royal Caribbean Cruises, Ltd.(b) 0.000%, 02/02/21 15,787,500 -------------- CONSUMER GROWTH STAPLES (5.0%) 3,900,000 ICN Pharmaceuticals, Inc. 6.500%, 07/15/08 4,119,375 5,000,000 IVAX Corp. 5.500%, 05/15/07 5,131,250 12,600,000 Service Corp.(c) 6.750%, 06/22/08 14,080,500 17,050,000 Skechers USA, Inc.(c) 4.500%, 04/15/07 16,879,500 -------------- 40,210,625 -------------- TELECOMMUNICATIONS (4.2%) 12,000,000 Corning, Inc.(c) 4.875%, 03/01/08 12,450,000 20,000,000 Nextel Communications, Inc.(c) 6.000%, 06/01/11 21,500,000 -------------- 33,950,000 -------------- TOTAL CONVERTIBLE BONDS (cost $99,939,893) 129,475,600 ============== See accompanying Notes to Schedule of Investments. 3 CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- (+x SYNTHETIC CONVERTIBLE SECURITIES 21.2% BONDS - 18.0% BASIC INDUSTRIES (2.2%) $ 1,548,000 Boise Cascade Corp.(c) 7.000%, 11/01/13 $ 1,632,700 1,376,000 Buckeye Technologies Inc.(c) 8.500%, 10/01/13 1,472,320 860,000 Equistar Chemicals, LP(c) 10.625%, 05/01/11 967,500 1,474,000 Freeport-McMoRan Copper & Gold, Inc.(c) 10.125%, 02/01/10 1,628,770 301,000 FMC Corp. 10.250%, 11/01/09 356,685 2,924,000 Georgia-Pacific Corp.(c) 8.125%, 05/15/11 3,311,430 1,282,000 IPSCO, Inc.(c) 8.750%, 06/01/13 1,442,250 946,000 Ispat International(a)(c) 9.750%, 04/01/14 969,650 397,000 Jarden Corp. 9.750%, 05/01/12 448,610 774,000 Pope & Talbot, Inc. 8.375%, 06/01/13 804,960 1,376,000 Sealed Air Corp.(a) 6.875%, 07/15/33 1,427,275 344,000 Shaw Group, Inc.(c) 10.750%, 03/15/10 356,040 Steel Dynamics, Inc. 344,000 9.500%, 03/15/09 (a) 386,140 516,000 9.500%, 03/15/09 (c) 579,210 Union Carbide Corp. 533,000 7.875%, 04/01/23 (c) 517,010 688,000 7.500%, 06/01/25 (c) 646,720 344,000 6.700%, 04/01/09 (c) 349,160 -------------- 17,296,430 -------------- CAPITAL GOODS - INDUSTRIAL (0.8%) 860,000 General Motors Corp.(c) 8.250%, 07/15/23 922,631 1,032,000 Hutchison Whampoa International, Ltd.(a)(c) 6.250%, 01/24/14 1,014,815 413,000 IMCO Recycling Inc. 10.375%, 10/15/10 442,942 516,000 Jacuzzi Brands, Inc. 9.625%, 07/01/10 580,500 JLG Industries, Inc.(c) 172,000 8.375%, 06/15/12 178,880 774,000 8.250%, 05/01/08 843,660 860,000 Navistar International Corp.(c) 8.000%, 02/01/08 887,950 1,548,000 Terex Corp.(a) 7.375%, 01/15/14 1,621,530 -------------- 6,492,908 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- CAPITAL GOODS - TECHNOLOGY (1.8%) $ 2,236,000 Avnet, Inc.(c) 9.750%, 02/15/08 $ 2,582,580 2,150,000 EUR FIMEP, SA 11.000%, 02/15/13 3,086,203 860,000 Flextronics International, Ltd.(c) 6.500%, 05/15/13 875,050 585,000 Monitronics International Inc.(a) 11.750%, 09/01/10 628,875 190,000 Orbital Sciences Corp. 9.000%, 07/15/11 209,000 1,892,000 Rayovac Corp.(c) 8.500%, 10/01/13 2,033,900 1,797,000 Sanmina-SCI Corp. 10.375%, 01/15/10 2,111,475 843,000 Stoneridge, Inc. 11.500%, 05/01/12 1,011,600 344,000 Stratus Technologies, Inc.(a) 10.375%, 12/01/08 344,000 1,204,000 Xerox Corp. 7.625%, 06/15/13 1,234,100 -------------- 14,116,783 -------------- CONSUMER CYCLICAL (4.4%) 860,000 American Airlines, Inc.(a) 7.250%, 02/05/09 839,575 1,582,000 Aztar Corp.(c) 8.875%, 05/15/07 1,641,325 1,371,000 GBP EMI Group PLC 9.750%, 5/20/08 2,623,469 396,000 Fedders Corp.(a) 9.875%, 03/01/14 386,100 344,000 Global Cash Access LLC(a) 8.750%, 3/15/12 359,480 688,000 Imax Corp.(a) 9.625%, 12/01/10 698,320 2,967,000 Intrawest Corp. 10.500%, 02/01/10 3,256,282 2,408,000 Isle of Capri Casinos, Inc. 9.000%, 03/15/12 2,727,060 1,565,000 La Quinta Corp. 8.875%, 03/15/11 1,744,975 3,010,000 Mandalay Resort Group(c) 10.250%, 08/01/07 3,514,175 774,000 Oxford Industries, Inc.(a) 8.875%, 06/01/11 830,115 860,000 Phillips-Van Heusen Corp. 8.125%, 05/01/13 907,300 490,000 RH Donnelley Financial Corp.(a) 10.875%, 12/15/12 585,550 2,253,000 Royal Caribbean Cruises, Ltd.(c) 8.750%, 02/02/11 2,551,523 2,666,000 Russell Corp. 9.250%, 05/01/10 2,812,630 3,388,000 Saks, Inc.(c) 8.250%, 11/15/08 3,752,210 4 See accompanying Notes to Schedule of Investments. CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- $ 499,000 The Gap, Inc.(c) 10.550%, 12/15/08 $ 616,265 860,000 The Interpublic Group of Companies, Inc.(c) 7.250%, 8/15/11 918,348 2,064,000 United Rentals, Inc.(a)(c) 7.000%, 02/15/14 1,929,840 2,184,000 Vail Resorts, Inc.(a) 6.750%, 02/15/14 2,151,240 -------------- 34,845,782 -------------- CONSUMER GROWTH STAPLES (2.3%) 1,376,000 AOL Time Warner 7.625%, 04/15/31 1,510,399 387,000 Alpharma, Inc.(a)(c) 8.625%, 05/01/11 408,285 1,720,000 American Greetings Corp.(c) 11.750%, 07/15/08 2,021,000 705,000 AmeriPath, Inc.(c) 10.500%, 04/01/13 726,150 1,453,000 Bausch & Lomb, Inc. 7.125%, 08/01/28 1,467,229 172,000 CanWest Media, Inc. 7.625%, 04/15/13 184,040 Charter Communications Inc. 430,000 11.125%, 01/15/11 380,550 688,000 9.625%, 11/15/09 588,240 1,290,000 Charter Communications Holdings LLC 10.000%, 04/01/09 1,119,075 860,000 Chattem, Inc.(a) 7.000%, 03/01/14 842,800 516,000 Curative Health Services, Inc.(a) 10.750%, 05/01/11 520,515 860,000 DEX Media, Inc.(a)(c) 8.000%, 11/15/13 838,500 688,000 Hasbro, Inc. 6.600%, 07/15/28 663,920 980,000 Mariner Health Care, Inc.(a)(c) 8.250%, 12/15/13 994,700 963,000 Playtex Products, Inc.(a)(c) 8.000%, 03/01/11 1,015,965 1,118,000 Quintiles Transnational Corp.(a) 10.000%, 10/01/13 1,162,720 860,000 Rite Aid Corp.(c) 9.250%, 06/01/13 915,900 1,720,000 Spanish Broadcasting Systems, Inc. 9.625%, 11/01/09 1,827,500 344,000 The Reader's Digest Association, Inc.(a)(c) 6.500%, 03/01/11 349,160 516,000 Valeant Pharmaceuticals International(a) 7.000%, 12/15/11 526,320 -------------- 18,062,968 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- CONSUMER STAPLES (1.0%) $ 722,000 Del Monte Foods Company 8.625%, 12/15/12 $ 801,420 1,032,000 DIMON, Inc.(c) 7.750%, 06/01/13 1,013,940 Dole Food Company, Inc. 688,000 8.625%, 05/01/09 739,600 1,548,000 7.250%, 06/15/10 (c) 1,567,350 1,032,000 Pinnacle Foods Holding Corp.(a)(c) 8.250%, 12/01/13 1,082,310 1,720,000 Smithfield Foods, Inc. 7.750%, 05/15/13 1,866,200 516,000 United Agri Products(a) 8.250%, 12/15/11 586,950 -------------- 7,657,770 -------------- CREDIT CYCLICAL (1.2%) 2,236,000 Beazer Homes USA, Inc. 8.375%, 04/15/12 2,431,650 1,372,000 Hovnanian Enterprises, Inc.(c) 7.750%, 05/15/13 1,416,590 1,600,000 Standard Pacific Corp.(c) 9.500%, 09/15/10 1,772,000 1,453,000 Texas Industries, Inc.(c) 10.250%, 06/15/11 1,656,420 1,462,000 WCI Communities, Inc.(c) 7.875%, 10/01/13 1,535,100 924,000 EUR Waterford Wedgwood, PLC(a) 9.875%, 12/01/10 1,118,675 -------------- 9,930,435 -------------- ENERGY (2.1%) Chesapeake Energy Corp. 688,000 6.875%, 01/15/16(a)(c) 701,760 774,000 6.875%, 01/15/16(c) 789,480 946,000 Comstock Resources, Inc. 6.875%, 03/01/12 931,810 Forest Oil Corp. 516,000 8.000%, 12/15/11(c) 572,760 344,000 8.000%, 06/15/08 378,400 1,376,000 Giant Industries, Inc. 11.000%, 05/15/12 1,548,000 791,000 KCS Energy, Inc.(a) 7.125%, 04/01/12 794,955 946,000 Newfield Exploration Company(c) 8.375%, 08/15/12 1,050,060 1,032,000 Paramount Resources, Ltd. 7.875%, 11/01/10 1,026,840 1,943,000 Petrobras International Finance Company(c) 8.375%, 12/10/18 1,836,135 860,000 Plains All American Pipeline, LP(c) 7.750%, 10/15/12 986,019 See accompanying Notes to Schedule of Investments. 5 CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- Premcor, Inc.(c) $ 1,101,000 9.500%, 02/01/13 $ 1,266,150 469,000 7.500%, 06/15/15 497,140 344,000 Swift Energy Company 9.375%, 05/01/12 383,560 Tesoro Petroleum Corp. 914,000 9.625%, 04/01/12(c) 1,035,105 344,000 9.000%, 07/01/08(c) 358,620 172,000 8.000%, 04/15/08 186,190 580,000 Tom Brown, Inc. 7.250%, 09/15/13 661,200 1,462,000 Western Gas Resources, Inc. 10.000%, 06/15/09 1,542,410 -------------- 16,546,594 -------------- FINANCIAL (0.7%) 1,600,000 Host Marriott Corp.(c) 9.500%, 01/15/07 1,784,000 1,290,000 Leucadia National Corp.(c) 7.000%, 08/15/13 1,322,250 1,892,000 LNR Property Corp. 7.250%, 10/15/13 1,920,380 292,000 OMEGA Healthcare Investors, Inc.(a) 7.000%, 04/01/14 299,300 671,000 Senior Housing Property Trust 7.875%, 04/15/15 714,615 -------------- 6,040,545 -------------- TELECOMMUNICATIONS (0.6%) 1,027,000 Avaya, Inc. 11.125%, 04/01/09 1,216,995 946,000 DIRECTV, Inc.(c) 8.375%, 03/15/13 1,061,885 1,118,000 General Cable Corp.(a) 9.500%, 11/15/10 1,229,800 344,000 iPCS, Escrow Company(a) 11.500%, 05/01/12 350,880 1,152,000 Primus Telecommunications Group, Inc.(a)(c) 8.000%, 01/15/14 1,065,600 -------------- 4,925,160 -------------- TRANSPORTATION (0.5%) 516,000 GATX Corp.(c) 8.875%, 06/01/09 589,005 2,012,000 General Maritime Corp.(c) 10.000%, 03/15/13 2,273,560 1,101,000 Laidlaw Global Securities, Inc.(a) 10.750%, 06/15/11 1,241,377 -------------- 4,103,942 -------------- PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- UTILITIES (0.4%) $ 516,000 Calpine Canada Energy Finance, ULC(c) 8.500%, 05/01/08 $ 366,360 Calpine Corp.(c) 1,720,000 8.500%, 02/15/11 1,212,600 1,548,000 7.750%, 04/15/09 1,079,730 258,000 Communications & Power Industries, Inc.(a) 8.000%, 02/01/12 264,450 516,000 NRG Energy, Inc.(a)(c) 8.000%, 12/15/13 522,450 -------------- 3,445,590 -------------- TOTAL BONDS 143,464,907 -------------- NUMBER OF CONTRACTS VALUE ----------------------------------------------------------------- OPTIONS (3.2%) BASIC INDUSTRIES (0.1%) 1,600 Freeport-McMoRan Copper & Gold, Inc.(b) Call, 01/21/06, Strike 45.00 416,000 -------------- CAPITAL GOODS - TECHNOLOGY (0.7%) 3,000 Advanced Micro Devices, Inc.(b) Call, 01/21/06, Strike 22.50 540,000 1,400 Broadcom Corp.(b) Call, 01/21/06, Strike 50.00 791,000 Intel Corp.(b) 1,900 Call, 01/21/06, Strike 35.00 342,000 900 Call, 01/21/06, Strike 27.50 369,000 4,200 Motorola, Inc.(b) Call, 01/21/06, Strike 20.00 1,218,000 1,600 National Semiconductor Corp.(b) Call, 01/21/06, Strike 50.00 1,056,000 2,500 Sybase, Inc.(b) Call, 01/21/06, Strike 20.00 562,500 Texas Instruments, Inc.(b) 2,200 Call, 01/21/06, Strike 40.00 308,000 800 Call, 01/21/06, Strike 30.00 288,000 -------------- 5,474,500 -------------- CONSUMER CYCLICAL (0.7%) 650 American Standard Companies, Inc.(b) Call, 01/21/06, Strike 110.00 838,500 2,000 Carnival Corp.(b) Call, 01/21/06, Strike 45.00 1,100,000 2,200 International Game Technology(b) Call, 01/21/06, Strike 45.00 1,034,000 6 See accompanying Notes to Schedule of Investments. CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) NUMBER OF CONTRACTS VALUE ----------------------------------------------------------------- 3,800 Metro-Goldwyn-Mayer, Inc.(b) Call, 01/21/06, Strike 17.50 $ 1,634,000 1,500 Nordstrom, Inc.(b) Call, 01/21/06, Strike 40.00 630,000 1,300 J.C. Penney Company, Inc. Holdings Company(b) Call, 01/21/06, Strike 40.00 481,000 -------------- 5,717,500 -------------- CONSUMER GROWTH STAPLES (0.7%) 1,400 Bausch & Lomb, Inc.(b) Call, 01/21/06, Strike 60.00 1,428,000 1,600 Federated Department Stores, Inc.(b) Call, 01/21/06, Strike 55.00 960,000 1,500 Guidant Corp.(b) Call, 01/21/06, Strike 70.00 1,207,500 2,700 Pfizer, Inc.(b) Call, 01/21/06, Strike 37.50 918,000 2,560 Starbucks Corp.(b) Call, 01/21/06, Strike 45.00 1,126,400 -------------- 5,639,900 -------------- CONSUMER STAPLES (0.3%) 1,700 Altria Group, Inc.(b) Call, 01/21/06, Strike 55.00 969,000 4,000 Tyson Foods, Inc.(b) Call, 01/21/06, Strike 17.50 1,520,000 -------------- 2,489,000 -------------- ENERGY (0.5%) 1,750 Amerada Hess Corp.(b) Call, 01/21/06, Strike 70.00 1,688,750 2,300 Apache Corp.(b) Call, 01/21/06, Strike 45.00 1,276,500 2,400 Transocean, Inc.(b) Call, 01/21/06, Strike 30.00 1,128,000 -------------- 4,093,250 -------------- FINANCIAL (0.1%) 850 Countrywide Financial Corp.(b) Call, 01/21/06, Strike 63.375 1,204,875 -------------- NUMBER OF CONTRACTS VALUE ----------------------------------------------------------------- TELECOMMUNICATIONS (0.1%) 2,000 Nextel Communications, Inc.(b) Call, 01/21/06, Strike 30.00 $ 545,000 -------------- TOTAL OPTIONS 25,580,025 -------------- TOTAL SYNTHETIC CONVERTIBLE SECURITIES (Cost $162,853,503) 169,044,932 ============== NUMBER OF SHARES VALUE ----------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS (17.8%) CAPITAL GOODS - INDUSTRIAL (5.0%) 179,000 Cummins, Inc.(c) 7.000% 12,820,875 486,000 Ford Motor Company Capital Trust II 6.500% 27,424,980 -------------- 40,245,855 -------------- CAPITAL GOODS - TECHNOLOGY (0.9%) 135,300 Agilysys, Inc. 6.750% 6,815,738 -------------- CONSUMER CYCLICAL (1.5%) 210,000 The Interpublic Group of Companies, Inc. 5.375% 12,083,400 -------------- CONSUMER GROWTH STAPLES (2.4%) 377,000 Cendant Corp.(c) 7.750% 18,774,600 -------------- FINANCIAL (2.9%) 650,000 National Australia Bank, Ltd. 7.875% 23,341,500 -------------- INDUSTRIAL (0.7%) 225,000 General Motors Corp. 5.250% 5,683,500 -------------- UTILITIES (4.4%) 410,000 AES Trust III(c) 6.750% 17,220,000 350,000 CenterPoint Energy, Inc. (AOL Time Warner) 2.000% 11,692,800 140,000 TXU Corp.(c) 8.125% 5,878,600 -------------- 34,791,400 -------------- TOTAL CONVERTIBLE PREFERRED STOCK (Cost $115,399,998) 141,735,993 ============== See accompanying Notes to Schedule of Investments. 7 CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS APRIL 30, 2004 (UNAUDITED) PRINCIPAL AMOUNT VALUE ----------------------------------------------------------------- SHORT TERM INVESTMENTS (41.3%) $320,375,130 Bank of New York Institutional Cash Reserve Fund(d) current rate 1.116% $ 320,375,130 8,821,000 Exxon Mobil Corp. Commercial Paper 0.840%, 05/03/04 8,820,588 -------------- TOTAL SHORT TERM INVESTMENTS (Cost $329,195,719) 329,195,718 ============== TOTAL INVESTMENTS (183.1%) (Cost $1,359,765,367) 1,460,118,806 ============== LIABILITIES, LESS OTHER ASSETS (-34.9%) (278,802,777) PREFERRED SHARES AT REDEMPTION VALUE, INCLUDING DIVIDENDS PAYABLE (-48.2%) (384,012,480) -------------- NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS (100.0%) $ 797,303,549 ============== NOTES TO SCHEDULE OF INVESTMENTS Note: Market values for securities denominated in foreign currencies are shown in U.S. dollars. (a) 144A securities are those that are exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities are generally issued to qualified institutional buyers ("QIBs"), such as the Fund. Any resale of these securities must be generally effected through a sale that is exempt from registration (eg. a sale to another QIB), or the security must be registered for public sale. At April 30, 2004, the market value of 144A securities that can not currently be exchanged to the registered form is $171,547,643 or 21.5% of net assets applicable to common shareholders of the Fund. (b) Non-income producing security. (c) Security, or portion of security, is on loan. (d) Security is purchased with the cash collateral from securities loaned. FOREIGN CURRENCY ABBREVIATIONS EUR: European Monetary Unit GBP: Great Britain Pound 8 See accompanying Notes to Schedule of Investments. STATEMENT OF ASSETS AND LIABILITIES APRIL 30, 2004 (UNAUDITED) ------------------------------------------------------------------------------ ASSETS Investments, at value* (cost $1,359,765,367) $1,460,118,806 Cash with custodian (interest bearing) 2,968 Accrued interest and dividends receivable 23,255,353 Receivable for securities sold 15,092,068 Unrealized appreciation on interest rate swaps 7,206,647 Prepaid expenses 85,563 Other assets 17,126 -------------- Total Assets 1,505,778,531 -------------- LIABILITIES Payable upon return of securities loaned 320,375,130 Payable for investments purchased 3,266,777 Payable to investment advisor 536,976 Payable for preferred shares offering 73,456 Payable for deferred compensation to Trustees 17,126 Other accounts payable and accrued liabilities 193,037 -------------- Total Liabilities 324,462,502 -------------- PREFERRED SHARES $25,000 liquidation value per share applicable to 15,360 shares, including dividends payable $ 384,012,480 -------------- NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS $ 797,303,549 ============== COMPOSITION OF NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS Common stock, no par value, unlimited shares authorized, 44,481,278 shares issued and outstanding $ 636,151,963 Undistributed net investment income (loss) 8,682,999 Accumulated net realized gain (loss) on investments, options, foreign currency transactions and interest rate swaps 44,888,613 Net unrealized appreciation (depreciation) on investments, options, foreign currency translations and interest rate swaps 107,579,974 -------------- NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS $ 797,303,549 ============== Net asset value per common share based on 44,481,278 shares issued and outstanding $ 17.92 ============== * Includes $306,954,161 of securities loaned. See accompanying Notes to Financial Statements. 9 STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED APRIL 30, 2004 (UNAUDITED) ---------------------------------------------------------------------------- INVESTMENT INCOME Interest $ 40,517,079 Dividends 5,966,495 Securities lending income 380,972 ------------ Total investment income 46,864,546 ------------ EXPENSES Investment advisory fees 4,661,740 Auction agent fees 454,469 Audit and legal fees 50,020 Printing and mailing fees 73,794 Custodian fees 44,310 Registration fees 22,451 Transfer agent fees 13,264 Trustees' fees 7,451 Other 56,246 ------------ Total expenses 5,383,745 ------------ Less expenses waived (1,456,794) ------------ Net expenses 3,926,951 ------------ NET INVESTMENT INCOME (LOSS) 42,937,595 ------------ REALIZED AND UNREALIZED GAIN (LOSS) FROM INVESTMENTS, OPTIONS, FOREIGN CURRENCY AND INTEREST RATE SWAPS Net realized gain (loss) from: Investments 44,396,827 Foreign currency transactions 3,134,693 Interest rate swaps (2,643,401) Change in net unrealized appreciation/depreciation on: Investments (30,430,983) Foreign currency translations (25,480) Interest rate swaps 2,083,062 ------------ NET REALIZED AND UNREALIZED GAIN (LOSS) FROM INVESTMENTS, OPTIONS, FOREIGN CURRENCY AND INTEREST RATE SWAPS 16,514,718 ------------ NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS 59,452,313 ------------ DIVIDENDS TO PREFERRED SHAREHOLDERS FROM Net investment income (1,947,785) Capital gains (162,833) ------------ (2,110,618) ------------ NET INCREASE (DECREASE) IN NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS RESULTING FROM OPERATIONS $ 57,341,695 ============ 10 See accompanying Notes to Financial Statements. STATEMENT OF CHANGES IN NET ASSETS FOR THE SIX MONTHS ENDED FOR THE APRIL 30, 2004 YEAR ENDED (UNAUDITED) OCTOBER 31, 2003 ---------------------------------------------------------------------------------------------------- OPERATIONS Net investment income (loss) $ 42,937,595 $ 77,268,986* Net realized gain (loss) on investments, options, foreign currency transactions and interest rate swaps 44,888,119 22,646,333* Change in net unrealized appreciation/depreciation on investments, options, foreign currency translations and interest rate swaps (28,373,401) 167,276,243 Dividends to preferred shareholders from Net investment income (1,947,785) (2,763,180) Capital gains (162,833) -- ------------ ------------ Net increase (decrease) in net assets applicable to common shareholders resulting from operations 57,341,695 264,428,382 ------------ ------------ DIVIDENDS TO COMMON SHAREHOLDERS FROM Net investment income (39,774,332) (71,360,002) Capital gains (19,991,745) -- ------------ ------------ Net decrease in net assets from dividends to common shareholders (59,766,077) (71,360,002) ------------ ------------ CAPITAL STOCK TRANSACTIONS Offering costs on preferred shares (2,023,000) (92,968) Reinvestment of dividends resulting in the issuance of common stock 10,987,420 10,895,006 ------------ ------------ Net increase (decrease) in net assets from capital stock transactions 8,964,420 10,802,038 ------------ ------------ TOTAL INCREASE (DECREASE) IN NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS 6,540,038 203,870,418 ------------ ------------ NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS Beginning of period 790,763,511 586,893,093 ------------ ------------ End of period $797,303,549 $790,763,511 ------------ ------------ Undistributed net investment income $ 8,682,999 $ 7,467,521 ============ ============ * Interest rate swap payments reclassed from net investment income to net realized gain (loss). See accompanying Notes to Financial Statements. 11 NOTES TO FINANCIAL STATEMENTS (UNAUDITED) NOTE 1 - ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES ORGANIZATION. CALAMOS Convertible Opportunities and Income Fund (the "Fund") was organized as a Delaware statutory trust on April 17, 2002 and is registered under the Investment Company Act of 1940 as a diversified, closed-end management investment company. The Fund commenced operations on June 28, 2002. The Fund's investment objective is to provide total return, through a combination of capital appreciation and current income. The Fund currently seeks to achieve its investment objective by investing substantially all of its assets in convertible securities and non-convertible income securities. PORTFOLIO VALUATION. In computing the net asset value of the Fund, portfolio securities, including options, that are traded on a national securities exchange are valued at the last reported sales price. Securities quoted on the NASDAQ National Market System are valued at the Nasdaq Official Closing Price ("NOCP"), as determined by Nasdaq, or lacking an NOCP, the last current reported sale price as of the time of valuation. Securities traded in the over-the counter market and listed securities for which no sales were reported are valued at the mean of the most recently quoted bid and asked prices. Short-term securities with maturities of 60 days or less are valued at amortized cost which approximates market value. When market quotations are not readily available or when the valuation methods mentioned above are not reflective of the fair value of the security, the security is valued at a fair value following procedures approved by the Board of Trustees or a committee thereof. These procedures may utilize valuations furnished by pricing services approved by the Board of Trustees or a committee thereof, which may be based on market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, a computerized matrix system, or appraisals derived from information concerning the securities or similar securities received from recognized dealers in those securities. Securities that are principally traded in a foreign market are valued as of the close of the appropriate exchange or other designated time. Trading in securities on European and Far Eastern securities exchanges and over-the-counter markets is normally completed at various times before the close of business on each day on which the New York Stock Exchange ("NYSE") is open. Trading of these securities may not take place on every NYSE business day. In addition, trading may take place in various foreign markets on Saturdays or on other days when the NYSE is not open and on which the Fund's net asset value is not calculated. Therefore, such calculation does not take place contemporaneously with the determination of the prices of many of the portfolio securities used in such calculation and the value of the Fund's portfolio may be significantly affected on days when shares of the Fund may not be purchased or redeemed. As stated above, if the market prices are not readily available or are not reflective of the fair value of the security, the security will be valued at a fair value following procedures approved by the Board of Trustees or a committee thereof. INVESTMENT TRANSACTIONS AND INVESTMENT INCOME. Short term investment transactions are recorded on a trade date basis. Long term investment transactions are recorded on a trade date plus one basis, except for April 30th and October 31st, which are recorded on trade date. Net realized gains and losses from investment transactions are reported on an identified cost basis. Interest income is recognized using the accrual method and includes accretion of original issue and market discount and amortization of premium. Dividend income is recognized on the ex-dividend date, except that certain dividends from foreign securities are recorded as soon as the information becomes available. FOREIGN CURRENCY TRANSLATION. Values of investments denominated in foreign currencies are converted into U.S. dollars using the spot market rate of exchange. Purchases and sales of investments and dividend and interest income are translated into U.S. dollars using the spot market rate of exchange prevailing on the respective dates of such transaction. FEDERAL INCOME TAXES. No provision has been made for Federal income taxes since the Fund is taxed as a "regulated investment company" under Subchapter M of the Internal Revenue Code of 1986. 12 NOTES TO FINANCIAL STATEMENTS (UNAUDITED) DIVIDENDS. Dividends payable to shareholders are recorded by the Fund on the ex-dividend date. Income and capital gain dividends are determined in accordance with income tax regulations, which may differ from accounting principles generally accepted in the United States. These differences are primarily due to differing treatments for foreign currency transactions and contingent payment debt instruments. USE OF ESTIMATES. The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimates. NOTE 2 - INVESTMENT ADVISOR AND TRANSACTIONS WITH AFFILIATES OR CERTAIN OTHER PARTIES Pursuant to an investment advisory agreement with CALAMOS ASSET MANAGEMENT, INC. ("CAM"), the Fund pays an annual fee, payable monthly, equal to 0.80% based on the average weekly managed assets. "Managed Assets" means the total assets of the Fund (including any assets attributable to any leverage that may be outstanding) minus the sum of accrued liabilities (other than debt representing financial leverage). CAM has contractually agreed to waive a portion of its management fee at the annual rate of 0.25% of the average weekly managed assets of the Fund for the first five full years of the Fund's operation (through June 30, 2007) and to waive a declining amount for an additional three years (0.18% of the average weekly managed assets in 2008, 0.11% in 2009, and 0.04% in 2010). Under the terms of the Administration Agreement, CAM pays the Administrator, Princeton Administrators, L.P. a monthly fee at an annual rate of 0.125% of the Fund's average weekly managed assets, subject to a monthly minimum fee of $12,500. Certain portfolio transactions for the Fund may be executed through CALAMOS FINANCIAL SERVICES, INC. ("CFS") as broker, consistent with the Fund's policy of obtaining best price and execution. During the six months ended April 30, 2004, the Fund paid no brokerage commissions to CFS on purchases or sales of Fund securities. Certain officers and trustees of the Fund are also officers and directors of CFS and CAM. All officers and affiliated trustees serve without direct compensation from the Fund. The Fund has adopted a deferred compensation plan (the "Plan"). Under the Plan, a trustee who is not an "interested person" of CAM and has elected to participate in the Plan (a "participating trustee") may defer receipt of all or a portion of his compensation from the Fund. The deferred compensation payable to the participating trustee is credited to the trustee's deferral account as of the business day such compensation would have been paid to the trustee. The value of a trustee's deferred compensation account at any time is equal to what would be the value if the amounts credited to the account had instead been invested in shares of one or more of the Funds of the Calamos Investment Trust as designated by the trustee. Thus, the value of the account increases with contributions to the account or with increases in the value of the measuring shares, and the value of the account decreases with withdrawals from the account or with declines in the value of the measuring shares. If a participating trustee retires, the trustee may elect to receive payments under the plan in a lump sum or in equal installments over a period of five years. If a participating trustee dies, any amount payable under the Plan will be paid to the trustee's beneficiaries. Deferred compensation investments of $17,126 are included in "Other Assets" on the Statement of Assets and Liabilities at April 30, 2004. The Fund's obligation to make payment under the Plan is a general obligation of the Fund. NOTE 3 - INVESTMENTS Purchases and sales of investments other than short-term obligations for the six months ended April 30, 2004 were as follows: Purchases $460,862,052 Proceeds from sales 306,783,135 13 NOTES TO FINANCIAL STATEMENTS (UNAUDITED) The following information is presented on an income tax basis as of April 30, 2004. Differences between amounts for financial statements and Federal income tax purposes are primarily due to timing differences. The cost basis of investments for tax purposes at April 30, 2004 was as follows: Cost basis of investments $1,360,072,218 Gross unrealized appreciation 113,780,424 Gross unrealized depreciation (13,733,836) -------------- Net unrealized appreciation (depreciation) $ 100,046,588 ============== NOTE 4 - FORWARD FOREIGN CURRENCY CONTRACTS The Fund may engage in portfolio hedging with respect to changes in currency exchange rates by entering into forward foreign currency contracts to purchase or sell currencies. A forward foreign currency contract is a commitment to purchase or sell a foreign currency at a future date at a negotiated forward rate. Risks associated with such contracts include movement in the value of the foreign currency relative to the U.S. dollar and the ability of the counterparty to perform. The net unrealized gain, if any, represents the credit risk to the Fund on a forward foreign currency contract. The contracts are valued daily at forward exchange rates and an unrealized gain or loss is recorded. The Fund realizes a gain or loss upon settlement of the contracts. There were no open forward foreign currency contracts at April 30, 2004. NOTE 5 - OPTIONS TRANSACTIONS The Funds may engage in options transactions and in doing so achieve the similar objectives to what they would achieve through the sale or purchase of individual securities. For the six months ended April 30, 2004 net realized gain on option transactions were $3,833,342. NOTE 6 - DISTRIBUTIONS TO SHAREHOLDERS The tax character of distributions paid during the year ended October 31, 2003 was as follows: OCTOBER 31, 2003 -------------------------------------------------------------------------------- Distribution paid from: Ordinary income $ 74,123,182 Net long-term capital gains -- ------------ Total taxable distribution 74,123,182 ============ As of October 31, 2003, the components of accumulated earnings/(losses) on a tax basis were as follows: Undistributed ordinary income -- net 22,302,635 Undistributed long-term capital gains -- net 5,444,071 ------------ Total undistributed earnings -- net 27,746,706 Capital loss carryforward -- ------------ Unrealized gains/(losses) -- net 135,829,262* ------------ Total accumulated earnings/(losses) -- net $163,575,968 ============ * The difference between book-basis and tax-basis unrealized gains/(losses) is attributable to the difference between book and tax amortization methods for premiums and discounts on fixed income securities and other temporary book/tax differences. 14 NOTES TO FINANCIAL STATEMENTS (UNAUDITED) NOTE 7 - COMMON STOCK There are unlimited common shares of beneficial interest authorized and 44,481,278 shares outstanding at April 30, 2004. CAM owned 7,213 of the outstanding shares. Transactions in common shares were as follows: SIX MONTHS ENDED YEAR ENDED APRIL 30, 2004 OCTOBER 31, 2003 ---------------------------------------------------------------------------------------------------- Beginning shares 43,904,538 43,267,593 Shares sold -- -- Shares issued through reinvestment of distributions 576,740 636,945 ---------- ---------- Ending shares 44,481,278 43,904,538 ========== ========== NOTE 8 - PREFERRED SHARES There are unlimited shares of Auction Market Preferred Shares ("Preferred Shares") authorized. The Preferred Shares have rights as determined by the Board of Trustees. The 15,360 shares of Preferred Shares outstanding consist of seven series, 2,040 shares of M, 2,040 shares of TU, 2,040 shares of W7, 2,400 shares of W28, 2,400 shares of TH7, 2,040 shares of TH28, and 2,400 shares of F. The Preferred Shares have a liquidation value of $25,000 per share plus any accumulated but unpaid dividends whether or not declared. Dividends on the Preferred Shares are cumulative at a rate typically reset every seven and twenty-eight days based on the results of an auction. Dividend rates ranged from 1.03% to 1.50% for the six months ended April 30, 2004. Under the Investment Company Act of 1940, the Fund may not declare dividends or make other distribution on shares of common stock or purchases any such shares if, at the time of the declaration, distribution or purchase, asset coverage with respect to the outstanding Preferred Shares would be less than 200%. The Preferred Shares are redeemable at the option of the Fund, in whole or in part, on any dividend payment date at $25,000 per share plus any accumulated but unpaid dividends. The Preferred Shares are also subject to mandatory redemption at $25,000 per share plus any accumulated but unpaid dividends, whether or not declared, if certain requirements relating to the composition of the assets and liabilities of the Fund as set forth in the Statement of Preferences are not satisfied. The holders of Preferred Shares have voting rights equal to the holders of common stock (one vote per share) and will vote together with holders of shares of common stock as a single class except on matters affecting only the holders of Preferred shares or the holders of common shares. NOTE 9 - INTEREST RATE TRANSACTIONS The Fund may enter into interest rate swap or cap transactions to attempt to protect itself from increasing dividend or interest expense on its leverage resulting from increasing short-term interest rates. A decline in interest rates may result in a decline in the value of the swap or cap, which may result in a decline in the net asset value of the Fund. In addition, if the counterparty to an interest rate swap or cap defaults, the Fund would not be able to use the anticipated receipts under the swap or cap to offset the dividend or interest payments on the Fund's leverage. At the time an interest rate swap or cap reaches its scheduled termination, there is a risk that the Fund would not be able to obtain a replacement transaction or that the terms of the replacement would not be as favorable as on the expiring transaction. In addition, if the Fund is required to terminate any swap or cap early due to the Fund failing to maintain a required 200% asset coverage of the liquidation value of the outstanding preferred shares or the Fund loses its credit rating on its preferred shares, then the Fund could be required 15 NOTES TO FINANCIAL STATEMENTS (UNAUDITED) to make a termination payment, in addition to redeeming all or some of the preferred shares. Details of the swap agreements outstanding as of April 30, 2004 were as follows: TERMINATION NOTIONAL UNREALIZED COUNTERPARTY DATE AMOUNT (000) FIXED RATE FLOATING RATE APPRECIATION --------------------------------------------------------------------------------------------------------------------------------- Merrill Lynch July 3, 2006 $65,000 1.9100% 1 month LIBOR $1,107,615 Merrill Lynch July 3, 2007 65,000 2.3250% 1 month LIBOR 1,899,072 Merrill Lynch July 3, 2008 70,000 2.6850% 1 month LIBOR 2,811,935 Merrill Lynch November 28, 2006 60,000 2.8200% 1 month LIBOR 235,913 Merrill Lynch November 28, 2007 60,000 3.2575% 1 month LIBOR 465,612 Merrill Lynch November 28, 2008 60,000 3.5975% 1 month LIBOR 686,500 ------------ $7,206,647 ========== NOTE 10 - SECURITIES LENDING During the six months ended April 30, 2004, the Fund lent certain of its securities to broker-dealers and banks. Any such loan must be continuously secured by collateral in cash or cash equivalents maintained on a current basis in an amount at least equal to the market value of the securities loaned by the Fund. The Fund would continue to receive the equivalent of the interest or dividends paid by the issuer on the securities loaned, and would also receive an additional return that may be in the form of a fixed fee or a percentage of the collateral. The Fund may pay reasonable fees to persons unaffiliated with the Fund for services in arranging these loans. The Fund would have the right to call the loan and obtain the securities loaned at any time on notice of not more than five business days. The Fund would not have the right to vote the securities during the existence of the loan but could call the loan in an attempt to permit voting of the securities. In the event of bankruptcy or other default of the borrower, the Fund could experience both delays in liquidating the loan collateral or recovering the loaned securities and losses, including (a) possible decline in the value of the collateral or in the value of the securities loaned during the period while the Fund seeks to enforce its rights thereto, (b) possible subnormal levels of income and lack of access to income during this period, and (c) expenses of enforcing its rights. In an effort to reduce these risks, the investment manager will monitor the creditworthiness of the firms to which the Fund lends securities. At April 30, 2004, the Fund had securities valued at $306,954,161 on loan to brokers-dealers and, $320,375,130 in cash equivalent collateral. 16 FINANCIAL HIGHLIGHTS SELECTED DATA FOR A COMMON SHARE OUTSTANDING THROUGHOUT THE PERIOD WAS AS FOLLOWS: For the Period Ended For the Six Months October 31, Ended April 30, 2004 ---------------------- (unaudited) 2003 2002* ---------------------------------------------------------------------------------------------------------------- Net asset value, beginning of period $ 18.01 $ 13.56 $ 14.32(a) -------- -------- -------- Income from investment operations: Net investment income (loss) 1.00 1.77(b) 0.39(c) Net realized and unrealized gain (loss) from investments, foreign currency and interest rate swaps 0.30 4.38(b) (0.77) Dividends to preferred shareholders from Net investment income (common stock equivalent basis) (0.04) (0.06) (0.01) Capital gains (common stock equivalent basis) --(g) -- -- -------- -------- -------- Total from investment operations 1.26 6.09 (0.39) ---------------------------------------------------------------------------------------------------------------- Less dividends to common shareholders from Net investment income (0.90) (1.64) (0.29) Capital gains (0.45) -- -- Capital charge resulting from issuance of common and preferred shares -- -- (0.08) -------- -------- -------- ---------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 17.92 $ 18.01 $ 13.56 ======== ======== ======== Market value, end of period $ 19.07 $ 19.60 $ 14.20 ---------------------------------------------------------------------------------------------------------------- Total investment return based on(d): Net asset value 6.79% 46.48% -3.33% Market value 4.42% 52.22% -3.33% ---------------------------------------------------------------------------------------------------------------- Ratios and Supplemental Data: Net assets applicable to common shareholders, end of period (000's omitted) $797,304 $790,764 $586,893 Preferred shares, at redemption value ($25,000 per share liquidation preference) (000's omitted) 384,000 204,000 204,000 Ratios to average net assets: Net expenses 0.99%(e) 0.86% 0.79%(e) Gross expenses prior waiver of expense by the advisor 1.35%(e) 1.18% 1.06%(e) Net investment income 10.77%(e) 10.89%(b) 8.21%(e) Preferred share dividends 0.49%(e) 0.39% 0.23%(e) Net investment income, net of preferred share dividends from net investment income 10.28%(e) 10.50%(b) 7.99%(e) Portfolio turnover rate 28% 42% 2% Asset coverage per preferred share, at end of period(f) $ 76,909 $121,907 $ 96,934 ---------------------------------------------------------------------------------------------------------------- * The Fund commenced operations on June 28, 2002. (a) Net of sales load of $0.68 on initial shares issued. (b) Interest rate swap payments reclassed from net investment income to net realized gain (loss). (c) Based on average shares method. (d) Total investment return is calculated assuming a purchase of common stock on the opening of the first day and a sale on the closing of the last day of the period reported. Dividends and distributions are assumed, for purposes of this calculation, to be reinvested at prices obtained under the Fund's dividend reinvestment plan. Total return is not annualized for periods less than one year. Brokerage commissions are not reflected. (e) Annualized. (f) Calculated by subtracting the Fund's total liabilities (not including preferred shares) from the Fund's total assets and dividing this by the number of preferred shares outstanding. (g) Capital gains distributed to preferred shareholders equated to less than $0.01 per common share. 17 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Board of Trustees and Shareholders of CALAMOS Convertible Opportunities and Income Fund We have reviewed the accompanying statement of assets and liabilities, including the schedule of investments, of CALAMOS Convertible Opportunities and Income Fund (the "Fund") as of April 30, 2004, and the related statements of operations and changes in net assets and the financial highlights for the semi-annual period then ended. These interim financial statements and financial highlights are the responsibility of the Fund's management. We conducted our review in accordance with standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion. Based on our review, we are not aware of any material modifications that should be made to such interim financial statements and financial highlights for them to be in conformity with accounting principles generally accepted in the United States of America. We have previously audited, in accordance with standards of the Public Company Accounting Oversight Board (United States), the statement of assets and liabilities, including the schedule of investments, of the Fund as of October 31, 2003, and the related statements of operations and changes in net assets and the financial highlights for the year then ended; and in our report dated December 17, 2003, we expressed an unqualified opinion on those financial statements and financial highlights. /s/ Deloitte & Touche LLP Chicago, Illinois June 15, 2004 18 FOR 24 HOUR SHAREHOLDER ASSISTANCE 800.432.8224 TO OBTAIN INFORMATION 800.582.6959 VISIT OUR WEB-SITE www.calamos.com INVESTMENT ADVISER CALAMOS ASSET MANAGEMENT, INC. 1111 E. Warrenville Road Naperville, IL 60563-1463 ADMINISTRATOR Princeton Administrators, L.P. P.O. Box 9095 Princeton, NJ 08543-9095 CUSTODIAN AND TRANSFER AGENT The Bank of New York P.O. Box 11258 Church Street Station New York, NY 10286 800.524.4458 INDEPENDENT AUDITORS Deloitte & Touche LLP Chicago, IL LEGAL COUNSEL Bell, Boyd & Lloyd LLC Chicago, IL [RECYCLED LOGO] 1790 04/04 ITEM 2. CODE OF ETHICS. Not applicable. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable ITEM 6. SCHEDULE OF INVESTMENTS. Not applicable ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable ITEM 8. PURCHASES OF EQUITY SECURITIES BY CLOSED-END FUNDS. Not applicable. ITEM 9. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Not applicable. ITEM 10. CONTROLS AND PROCEDURES. a) The registrant's principal executive officer and principal financial officer have evaluated the registrant's disclosure controls and procedures within 90 days of this filing and have concluded that the registrant's disclosure controls and procedures were effective, as of that date, in ensuring that information required to be disclosed by the registrant in this Form N-CSR was recorded, processed, summarized, and reported on a timely basis. b) There were no changes in the registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the registrant's last fiscal half-year (the registrant's second fiscal half-year in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 11. EXHIBITS. (a)(1) Code of Ethics -- Not applicable. (a)(2)(i) Certification of Principal Executive Officer. (a)(2)(ii) Certification of Principal Financial Officer. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Calamos Convertible Opportunities and Income Fund By: /s/ John P. Calamos, Sr. ----------------------------------------------------------------------------- Name: John P. Calamos, Sr. Title: Principal Executive Officer Date: July 6, 2004 By: /s/ Patrick H. Dudasik ----------------------------------------------------------------------------- Name: Patrick H. Dudasik Title: Principal Financial Officer Date: July 6, 2004 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. Calamos Convertible Opportunities and Income Fund By: /s/ John P. Calamos, Sr. ----------------------------------------------------------------------------- Name: John P. Calamos, Sr. Title: Principal Executive Officer Date: July 6, 2004 By: /s/ Patrick H. Dudasik ----------------------------------------------------------------------------- Name: Patrick H. Dudasik Title: Principal Financial Officer Date: July 6, 2004