Take a look at some of Thursday's midday movers:
Nu Skin Enterprises The seller of anti-aging products said in a statement Thursday afternoon that it had initiated its own province-by-province business review in China, where regulators were investigating the company's practices. It acknowledged there would like be "a negative impact on China revenue," but said it was too soon to say whether its prior guidance would be impacted. Its shares, which were halted three times during Thursday's session, were lately down more than 33 percent.
Sarepta Therapeutics rose after the drug maker reported positive results from its Duchenne muscular dystrophy study.
Ralph Lauren lost ground following a Morgan Stanley downgrade to equal weight from overweight. The firm sees less clarity ahead.
J.C. Penney fell after both Goldman (to $6) and UBS (to $5) dropped their price targets in the wake of the company's announced store closings and job cuts.
Charles Schwab gained ground after reporting a 57 percent rise in quarterly profit on increased trading commissions and fees for managing client assets.
Tyson Foods climbed after Reuters reported the chicken processor was exploring a bid for Michael Foods, a distributor of egg and dairy products for more than $2 billion.
YRC Worldwide moved higher on news it was in talks to revise a labor contract with the Teamsters after an earlier proposal was rejected.
VMware rose after Citi upgraded the stock to buy from neutral.
Twitter gained ground after Telsey began coverage with a price target of $70 a share.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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