In this Feb. 21, 2012 photo, traders work on the floor at the New York Stock Exchange. Markets were subdued Thursday, Feb. 23, 2012, as Greece pressed ahead with reforms demanded by its

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In this Feb. 21, 2012 photo, traders work on the floor at the New York Stock Exchange. Markets were subdued Thursday, Feb. 23, 2012, as Greece pressed ahead with reforms demanded by its creditors in exchange for crucial bailout cash and as tensions rose in the Persian Gulf over Iran's nuclear program. (AP Photo/Seth Wenig) less