NEW YORK (Reuters) - A downgrade of United States' top-tier credit rating has Wall Street scrambling to figure out the knock-on effects for the financial system, from mortgages to banks to markets that rely on U.S. Treasuries for collateral. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=adioFnsIjKI:SA5GgCWYIzE:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=adioFnsIjKI:SA5GgCWYIzE:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/adioFnsIjKI)
Reuters