Sept. 22, 2011, 12:12 p.m. EDT Dow off 400 on Europe, growth worries Federated’s Orlando watches 1,100 level on the S&P 500 By MarketWatch NEW YORK (MarketWatch) — U.S. stocks slid sharply on Thursday, extending losses for the Standard & Poor’s 500 Index into a fourth day, as Wall Street’s worry about Europe’s debt trouble and the global economy intensified. The negative sentiment taking hold among investors is “driven by the bank runs in Europe, and some of the European banks are rumored to be looking in the Middle East for capital, it’s like a replay of 2008 for some...