Take a look at some of Wednesday's midday movers:
Knight Capital - Knight Capital moved to a seven-year low after a rush of high volume ripped through a handful of stocks in early trading. Several traders attributed the problem to computer generated trades through Knight Capital. CNBC reported a spokesperson for the firm was looking into the trading activity.
Energizer Holdings - The company's shares fell after the consumer products company said its revenues for the third quarter came in weaker than expected.
Forest Labs - Forest Labs moved lower after Institutional Shareholder Services said it would back two of Carl Icahn’s nominees to the company’s board. Icahn is waging a proxy fight to elect four directors to Forest’s 10-member board.
Con-way - Its shares plummeted as the trucking company posted weaker-than-expected earnings on lighter-than-expected freight volume.
BMC Software - BMC Software lost ground after its first-quarter earnings fell 43 percent, in part on soft demand.
Devon Energy - Its shares slid after the energy producer posted weak earnings on low natural gas prices.
MasterCard - MasterCard slipped despite reporting a 15 percent in quarterly profits, however its revenue came in below expectations.
Allergan - Allergan shares moved higher after the maker of Botox reported better-than-expected second-quarter earnings as revenue rose 4.8 percent.
Hyatt - Hyatt rose after the company reported better-than-expected earnings on increased demand. Revenue rose 8 percent to $1 billion.
Overseas Shipholding - Its shares lost ground after the world’s number two independent tanker operator by fleet posted its 13th straight quarterly loss. Rival Nordic American Tanker shares fell as well.
General Motors - GM shares rose despite reporting that U.S. sales for July fell 6.4 percent.
Ford Motor - Its shares fell a bit after it said its July sales fell 4 percent.
Amyris - Amyris shares fell after the company reported a wider-than-expected second-quarter loss, dragged down by its winding down of its ethanol and gasoline trading business. Revenue fell 40 percent.
Digital River - Digital River shares plummeted to a nine-year low after the company cuts its 2012 outlook.
Questions? Comments? Email us at firstname.lastname@example.org