LDK Solar Co., Ltd. (NYSE:LDK) is up 19.02% in the last hour of trading at $5.57. LDK is up on heavy volume today with 6 million shares traded, three times its average volume. LDK has followed the rest of the solar sector up today on stabilizing panel prices and increased demand. The company has a market cap of 716.57 million.

Human Genome Sciences Inc. (NASDAQ:HGSI) is up 17.56% in afternoon trading at $9.43. HGSI has traded nearly 18 million shares today, well above its daily average of 1.86 billion. HGSI shares are jumping today after the CEO of GlaxoSmithKline described the relationship between the two companies as ‘very happy’. The company has a market cap of 1.86 billion.

A123 Systems, Inc. (NASDAQ:AONE) is up 12.68% today at $2.40. AONE is up today on double its average volume with 4 million shares traded. A123 Systems congratulated BMW on the launch of ActiveHybrid 5 and 3. The company provides the lithium ion battery for both vehicles. The company has a market cap of 305.11 million.

DexCom, Inc. (NASDAQ:DXCM) is up 14.45% in late day trading at $10.14. DXCM has traded 1.3 million shares so far today, close to double its daily average volume. DXCM shares are up today despite the stock being downgraded by MLV & Co. The company has a market cap of 681.18 million.

UniTek Global Services, Inc. (NASDAQ:UNTK) is down 25.60% with about 30 minutes left till the close. UNTK is trading at $3.3850 and has traded 1.6 million shares so far today. That is way above its daily average of just 46 thousand shares. UNTK shares fell today after the CEO of the company resigned. The company has a market cap of 55.40 million.

Questcor Pharmaceuticals, Inc. (NASDAQ:QCOR) is down 13.91% today at $35.80. QCOR has had heavy selling volume today with 12.5 million shares traded, it usually trades 1.1 million shares daily. The company has a market cap of 2.25 billion.

Cabot Oil & Gas Corporation (NYSE:COG) is down 11.04% this afternoon at $69.92. COG has traded 5.2 million shares so far today and trades 2.1 million shares a day on average. COG’s decline comes as natural gas hit a 28 month low today. The company ha a market cap of 7.31 billion.

JetBlue Airways Corporation (NASDAQ:JBLU) is down 4.39% at $5.66. JBLU is down on large volume with 20.1 million shares traded today, four times its normal volume. JBLU announced preliminary traffic results for December earlier today. Traffic increased 14.3% year over year with capacity increasing by 17.1%. The company has a market cap of 1.67 billion.