In this Tuesday, April 16, 2013, photo, Trader John Yaccarine, left, and specialists Mark Otto, center, and Christopher Malloy, work on the floor of the New York Stock Exchange Tuesday, April 16, 2013. Disappointing earnings results weighed on the stock market in early trading on Thursday, April 18, 2013, following two steep drops this week. (AP Photo/Richard Drew)

Associated Press
In this Tuesday, April 16, 2013, photo, Trader John Yaccarine, left, and specialists Mark Otto, center, and Christopher Malloy, work on the floor of the New York Stock Exchange Tuesday, April 16, 2013. Disappointing earnings results weighed on the stock market in early trading on Thursday, April 18, 2013, following two steep drops this week. (AP Photo/Richard Drew)
In this Tuesday, April 16, 2013, photo, Trader John Yaccarine, left, and specialists Mark Otto, center, and Christopher Malloy, work on the floor of the New York Stock Exchange Tuesday, April 16, 2013. Disappointing earnings results weighed on the stock market in early trading on Thursday, April 18, 2013, following two steep drops this week. (AP Photo/Richard Drew)
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