Midday Movers: SHLD, M, SKS & More

Market Insider | What's Shaking | Stocks to Watch

Take a look at some of Tuesday's midday movers:

Retailers trading lower at mid-session include Sears Holding, Macy's and Saks.

Pharmaceutical stocks traded up to an 11 1/2 year high helped by gains in Pfizer, Allergan and Eli Lilly.

Best Buy fell following Monday's rally on news that founder Richard Schultze will rejoin the retailer as Chairman Emeritus.

Sonic hit a 52-week high after the restaurant chain's fiscal second-quarter earnings surged, helped by a drop in expenses including packaging costs and benefits.

Seagate Technology and Western Digital were higher after channel checks at Brean Capital indicated that the hard disk drive environment remains stable.

RF Micro Devices traded higher after an upgrade to "outperform" from "perform" by Oppenheimer.

Warren Buffett could become one of Goldman Sachs' ten largest shareholders after the two parties amended terms of warrants used in the 2008 deal that helped rescue the bank. Berkshire Hathaway shares were slightly higher, while Goldman Sachs dipped.

—By CNBC's Lori Spechler

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