Top Percentage Gainers and Losers as of 3:30pm 4/13/11 (ZOOM, GRM, SLGN, DCTH, QTM, IRBT, SIFY, DGW, INVE, YUII, CSR, TRGL, CIGX, MSB, KNDI, CNIT)

Best 1) Zoom Technologies ZOOM: Trading up 39.4% from yesterday's close to $4.32. The company acquired new patent licenses from Qualcomm QCOM, which will allow the company to develop new mobile phones for the global market. Shares had been up as much as 54% earlier in the session. 2) Graham Packaging Company GRM: Trading up 30.7% from yesterday's close to $21.84. Silgan Holdings SLGN announced that it will purchase the company for the equivalent of $19.65 per share in cash and stock. 3) Delcath Systems DCTH: Trading up 20% from yesterday's close to $8.71. The company reported that it has received approval to market and sell its Hepatic Chemosat system in Europe. 4) Silgan Holdings SLGN: Trading up 15.8% from yesterday's close to $42.67. Silgan announced that it will be purchasing Graham Packaging Company GRM for the equivalent of $19.65 in cash and stock. 5) Quantum Corporation QTM: Trading up 16.42% from yesterday's close to $3.09. The company reached an agreement with NetApp NTAP, which will Quantum to use NetApp's worldwide sales network to sell its software. Other notable movers iRobot IRBT: Up 13.79% from yesterday's close to $35.81. Sify Technologies SIFY: Up 12.47% from yesterday's close to $5.14. Duoyuan Global Water DGW: Up 9.17% from yesterday's close to $3.62. Worst 1) Identive Group INVE: Trading down 34.5% from yesterday's close to $3.73. A negative article at Seeking Alpha has the stock down. Shares reached a 52-week high in yesterday's session. 2) Yuhe International YUII: Trading down 19.8% from yesterday's close to $5.34. Shares had started out the day in positive territory. 3) China Security & Surveillance Technology CSR: Trading down 11.69% from yesterday's close to $4.08. A negative article from The Motley Fool highlighting potential problems regarding the company's cash flow is taking its toll. 4) Toreador Resources TRGL: Trading down 9.9% from yesterday's close to $7.79. Stock has broken to a new six month low in today's session. 5) Star Scientific CIGX: Trading down 8.7% from yesterday's close to $3.13. The stock has lost nearly 34% over the past seven trading sessions. Other notable movers Mesabi Trust MSB: Down 8.15% from yesterday's close to $35.50. Kandi Technologies KNDI: Down 6.56% from yesterday's close to $2.28. China Information Technology CNIT: Down 6.61% from yesterday's close to $2.41.