Take a look at some of Monday's midday movers:
Wells Fargo fell after Stifel Nicolaus downgraded the stock to "hold" from "buy" based on valuation.
Tesla moved higher after Morgan Stanley upgraded the car maker to "overweight" from "underweight."
Netflix lost ground after Macquarie began coverage with an "underperform" rating, adding that the firm noted the company will have trouble trying to raise prices.
Chipotle gained ground after ITG research said third-quarter sales were tracking above consensus figures.
Office Depot rose after Starboard increased its stake in the company to 13.3 percent.
Major steel companies, including US Steel, AK Steel, Metals USA and Reliance Steel & Aluminum fell after JPMorgan cut its ratings to "neutral," based on valuation.
OpenTable fell after Piper Jaffray downgraded the stocks to "neutral" from "overweight," based on valuation.
Retailers, including Gap, Ann, Macys and New York & Co. were lower after an earnings warning by Sweden based Hennes & Mauritz.
Waste Connections moved higher after it agreed to buy R360 Environmental Solutions for $1.3 billion in cash.
Iris International soared after Danaher agreed to buy the diagnostics company for $355 million in cash, or about $19.50 a share, a 45 percent premium from its Friday close.
AMN Healthcare Services fell after UBS downgraded the stocks to "sell" from "neutral," based on valuation.
Deckers Outdoor moved lower as Sterne Agee said UGG sales were off to a slow start to the season.
Hasbro fell after Stifel Nicolaus lowered its rating on the toy company to "hold" from "buy," based on valuation. Mattel fell in sympathy.
Threshold Pharmaceuticals plunged after it announced its cancer drug didn’t improve survival rates among pancreatic cancer patients.
—By CNBC's Rich Fisherman.
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