Stocks closed largely unchanged on Monday despite a downgrade of U.S. credit, which triggered a spike in debt yields and threatened to raise borrowing costs throughout the nation's economy. The Dow Jones Industrial Average closed up 137 points,

All three major U.S. stock market indexes rose Monday afternoon, following an earlier selloff sparked by long-dated Treasury yields surpassing the 5% mark after the financial ratings agency Moody’s downgraded the U.S. government’s credit rating late last week, citing rising debt and interest payment ratios.