Several retailers were also falling Friday, led by a big drop in Nordstrom after the department store operator released a weak forecast.
Technology stocks bucked the trend and moved higher. Facebook rose 1 percent and Applied Materials soared 9 percent.
The Dow Jones Industrial Average was down 34 points, or 0.2 percent, to 16,376 as of 11:45 a.m. Eastern time.
The Standard & Poor’s 500 index slipped a point to 1,916. The Nasdaq composite, which is heavily weighted with technology stocks, gained 18 points, or 0.4 percent, to 4,504.
The price of U.S. crude oil fell 4 percent to just under $30 a barrel in New York.