Specialist Edward Zelles, right, works on the floor of the New York Stock Exchange Thursday, Oct. 18, 2012. The U.S. stock market headed slightly lower on Thursday, following a leap in

 

              Specialist Edward Zelles, right, works on the floor of the New York Stock Exchange Thursday, Oct. 18, 2012.  The U.S. stock market headed slightly lower on Thursday, following a leap in
Specialist Edward Zelles, right, works on the floor of the New York Stock Exchange Thursday, Oct. 18, 2012. The U.S. stock market headed slightly lower on Thursday, following a leap in claims for unemployment benefits and weak results from American Express. (AP Photo/Richard Drew)