U.S. stocks are drifting lower and U.S. bonds are falling more sharply following the latest reminder that the U.S. government seems to be hurtling toward an unsustainable mountain of debt.

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.

The stock market opened with losses Monday as trading began for the first time since the U.S. government suffered a significant hit to its creditworthiness. The Dow Jones Industrial Average, Nasdaq composite and S&P 500 all fell after the opening bell Monday,