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In this photo made Wednesday, Nov. 4, 2009, ...

Copyright © 2009 AP

In this photo made Wednesday, Nov. 4, 2009, ...

AP - il y a 1 heure 22 min

In this photo made Wednesday, Nov. 4, 2009, specialists Scott Wetzel, Michael Bonnano and Peter Gaicchi, left to right, and Gennaro Saporito, foreground right, work at a post on the floor of the New York Stock Exchange. Stock market volatility is back, a signal to some experts that the powerful rally that started in early March may be coming to an end. (AP Photo/Richard Drew)