Take a look at some of Monday's midday movers:
Chesapeake Energy traded lower following declines in natural gas prices tied to warm weather forecasts for December.
Retailers including Coach, Macy's, Nordstrom, Target and Costco were among some of the worst performers. (Read More: )
Retail Stocks
Chart 1: Midday Movers: COH, M, CHK & More
Ceradyne declined following a report that its body armor plates were being recalled due to potential failure. Streetaccount.com notes that the company has identified the cause of the problem and is taking action.
Medical device maker Boston Scientific rallied after Citi upgraded the stock to "buy" from "neutral."
McDonald's slid after a downgrade from Lazard to "neutral" from "buy" citing increased competition.
McMoran Exploration traded lower on higher than average volume.
Yahoo hit its highest price in over two years after Goldman Sachs added the Internet company to its "Conviction Buy List."
Other stocks on 52-week highs include Home Depot, Whirlpool, Cooper Tire and Avery Dennison.
Stocks at 52-Week High
Chart 2: Midday Movers: COH, M, CHK & More
And on the mergers and acquisitions front:
Zhongpin rose after the China-based company agrees to be taken private in a deal that values the company at over $500 million or, $13.50 per share.
CHN Global and Fiat Industrial approved a merger effective in the second quarter of 2013. Shares of CHN fell following the news.
(Read More: )
—By CNBC's Lori Spechler.
Questions? Comments? Email us at marketinsider@cnbc.com