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JC Penney and OmniVision are big market movers

NEW YORK (AP) -- Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and the Nasdaq Stock Market:


J.C. Penney Co. Inc., down 45 cents to $9.66

The retailer reported a jump in a key sales metric for November but analysts note the numbers are still far below levels of two years ago.

Marathon Petroleum Corp., down $3.73 to $83.26

The refiner outlined aggressive spending plans for its retail wing, trying to offset its always volatile refining segment.

Deere & Co., up $2.67 to $85.38

The heavy-equipment manufacturer's board of directors approved an $8 billion expansion of its share buyback program.

Teradata Corp., down $2.82 to $42.53

Morgan Stanley downgraded the data-storage and hardware company, citing competition from upstart Hadoop.

Express Inc., down $5.67 to $19

The clothing company cut its outlook for the year after falling short of expectations for the third quarter.


ChemoCentryx Inc., up 14 cents to $5.16

The drugmaker said it's encouraged by initial results from a mid-stage study of a potential autoimmune disease treatment.

OmniVision Technologies Inc., down 47 cents to $15.52

A disappointing yearly outlook overshadowed a strong second quarter in which the image sensor company's profits doubled.

Western Digital Corp., up $2.04 to $77.57

The hard drive maker announced a new technology partnership with Baidu, which is China's biggest search engine operator.