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.
(Read More: See CNBC's Market Insider Blog)
s—By CNBC's Rich Fisherman.
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