By | August 08 2011 11:40 AM

The appeal of safe haven German bunds wore thin after the ECB said it would buy bonds of Italy and Spain following an emergency weekend meeting of its governing council. Global tensions mounted after Friday's close when Standard & Poor's served up a unwelcome medicine for the United States as it took back one-of-three A-letters from the sovereign rating of the world's largest economy. Despite the fears of many gloomsters, yields on U.S. government debts fell at the opening of the week with investors more concerned on the impact of S&P's fiscal take on global growth. As a result the differential between U.S. and German costs of borrowing widened in favor of the U.S.