Specialist John Parisi, right, works at his post on the floor of the New York Stock Exchange Tuesday, April 30, 2013. Stock prices are opening mostly lower on Wall Street as weak earnings from Pfizer ... more 
Specialist John Parisi, right, works at his post on the floor of the New York Stock Exchange Tuesday, April 30, 2013. Stock prices are opening mostly lower on Wall Street as weak earnings from Pfizer and other companies drag down major market averages. (AP Photo/Richard Drew) less 
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Associated Press | Photo By Richard Drew
Tue, Apr 30, 2013 12:10 PM EDT