A look at New York Stock Exchange 10 most-active stocks at 1 p.m.: AK Steel Holding Corp. fell 9.2 percent to $5.92 with 16,070,600 shares traded.
A decision by OPEC not to cut oil production is hammering major energy companies in the U.S. and abroad.
A renewed plunge in oil prices is a worrying sign of weakness in the global economy that could shake governments dependent on oil revenues.
Crude oil and Asian energy shares tumbled Friday as OPEC's decision to keep production steady rippled across the globe.
Asian shares meandered Thursday as data showed a drop in Chinese industrial profits, but expectations for further stimulus moves from China and Europe helped to limit losses.
Grain futures were mostly lower Wednesday in early trading on the Chicago Board of Trade.