Take a look at some of Friday's midday movers:
Hertz Global Holdings moved higher after CNBC reported that Carl Icahn had bought between 30 million and 40 million Hertz shares. Rival Avis Budget Group rose as well.
Herbalife, Nu Skin Enterprises and USANA Health Sciences all fell after the FTC said it would hold a news conference next Tuesday to announce an initiative against deceptive advertising of weight-loss products.
General Motors, Ford Motor and Toyota Motor all fell after reporting lighter-than-expected U.S. auto sales for December.
Sprint fell after S&P Capital IQ and Stifel Nicolaus downgraded the stock to sell from hold, saying that a potential merger with T-Mobile would have a hard time receiving regulatory approval.
Rite Aid gained after December same-store sales rose nearly 3 percent.
Delta Air Lines climbed after it reported increased load factors for December.
Exelon fell after Citi Investment Research cut its rating on the utility to sell from neutral.
T-Mobile US fell on news AT&T was offering T-Mobile users up to $450 to switch service providers.
Finisar rose after Raymond James upgraded the stock to strong buy from outperform.
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s—By CNBC's Rich Fisherman.
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