Take a look at some of Monday's midday movers:
Yahoo rose on news that Alibaba, in which it holds a 24 percent stake, did more than $5.7 billion in payments volume on China's Single's Day, akin to a Valentine's Day for the unattached, setting a record.
Apple came off its lows after Carl Icahn told CNBC's Scott Wapner that he had another good conversation with Apple CEO Tim Cook about the company's buyback situation.
Icahn Enterprises fell after Barron's said it appears to be overpriced considering the stock has risen 169% this year.
Tesla climbed as concerns over recent fires involving its electric cars dies down. Over the weekend the owner of the latest Model S to erupt in flames said he would buy another one in a heartbeat.
Twitter wavered between gains and losses as it began its first full week of trading and Sterne, Agee & Leach initiated coverage with a neutral rating.
Gogo surged after the provider of in-flight internet services hiked its year-end revenue estimate.
Tata Motors declined after Nomura Securities downgraded the Indian car maker to hold from buy, citing valuation.
Rocket Fuel climbed after BMO Capitol upgraded the provider of artificial-intelligence digital advertising technology to outperform from market perform.
Express rose after Goldman Sachs initiated coverage a buy rating and $28 price target, saying the apparel and accessory retailer is poised for outsized earnings growth.
RDA Microelectronics gained after the chip manufacturer said it had agreed to be acquired by China's Tsinghua Unigroup for $18.50 a share, or roughly $910 million.
Zalicus plummeted after the biopharmaceutical company said it would stop developing its most advanced experimental drug after it failed two mid-stage trials.
Arkansas Best rose after the trucking company's third-quarter earnings more than doubled on an uptick in revenues.
Cirrus Logic fell after Barclay's said the chip manufacturer isn't supplying an amplifier component to the new iPad air.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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