Trader Luke Scanlon, left, and specialist Patrick King work on the floor of the New York Stock Exchange, Tuesday, May 19, 2015. U.S. stocks are edging mostly lower in early trading as the market comes off its latest record high. (AP Photo/Richard Drew)
Mark Muller, right, works with fellow traders on the floor of the New York Stock Exchange, Tuesday, May 19, 2015. U.S. stocks are edging mostly lower in early trading as the market comes off its latest record high. (AP Photo/Richard Drew)
Specialist Jason Hardzewicz, left, and trader Gregory Rowe work on the floor of the New York Stock Exchange, Tuesday, May 19, 2015. U.S. stocks are edging mostly lower in early trading as the market comes off its latest record high. (AP Photo/Richard Drew)