U.S. Stocks Tumble as Prosecutors Scrutinize Goldman

April 30 (Bloomberg) -- Bloomberg's Deborah Kostroun reports on the performance of the U.S. equity market today. U.S. stocks tumbled, capping the biggest weekly drop since January, as criminal investigators scrutinized Goldman Sachs Group Inc. Transocean Ltd. tumbled 7.9 percent as the White House banned new offshore drilling until the Gulf of Mexico oil spill is investigated. (Source: Bloomberg)