Stocks are falling today after Moody�s downgraded the U.S. government�s credit rating Friday, citing repeated failures to rein in rising debt. The rating was cut from Aaa to Aa1, though Moody�s noted the U.S. still has �exceptional credit strengths� like a strong economy and the dollar�s global role. It�s the last of the three major agencies to issue a downgrade � following S&P in 2011 and Fitch in 2023.