U.S. Treasury prices soared on Monday after the first credit downgrade of U.S. debt caused investors to flee risky assets in favor of bonds on concern over the ripple effects of the ratings cut.
Treasuries benefited at the expense of risky assets including stocks, as investors maintained confidence that U.S. government debt may still be among the world's safest assets, if no longer risk free.
http://www.reuters.com/article...dUSTRE7773SI20110808