So you think 6% mortgage rates are too high? Here’s how bad it could get if the U.S. defaults on its debt. By: MarketWatch May 11, 2023 at 14:24 PM EDT Zillow say a U.S. debt default would put the housing market in a ‘deep freeze.’ Read More >> Related Stocks: DJIA Freddie Mac Moody's Corp Zillow Group Cl C