JPMorgan says buy that S&P 500 dip, but you might want to look at this chart first By: MarketWatch September 21, 2021 at 06:59 AM EDT Markets are rebounding after Monday's selloff, and one big Wall Street bank says it's a green flag to buy. Read More >> Related Stocks: Activision Blizzard, Inc - Common Stock Johnson & Johnson Mitsubishi UFJ Financial Group, Inc. Common Stock SPX U.S. Bancorp Universal Media Group Inc