Top Percentage Gainers and Losers as of 2pm 6/28/11

Best

1) Youku.com (NYSE: YOKU): Shares of Youku.com are currently trading up 31.1% from yesterday's close to $35.81. The company announced that it has launched its Youku Premium paid content platform. Youku.com entered into a distribution agreement with CAV Warner Home Entertainment, Warner Bros, which will allow Youku.com to add 400-500 Warner Brothers New Releases and Catalog titles to the Youku Premium library over the next three years.

2) First Bancorp (NYSE: FBP): Shares of First Bancorp are currently trading up 25.7% from yesterday's close to $4.54. The company announced that it has reached an agreement with Oaktree Management regarding a share purchase program. According to the agreement, Oaktree will purchase $175.5 million worth of common stock at $3.50 per share, which amounts to 24.9% of First Bancorp's outstanding shares.

3) Toreador Resources (NASDAQ: TRGL): Shares of Toreador Resources are currently trading up 21.8% from yesterday's close to $3.85. The stock hit a 52-week low of $3.14 in yesterday's trading session. The stock has lost 76% year-to-date.

4) Achillion Pharmaceuticals (NASDAQ: ACHN): Shares of Achillion Pharmaceuticals are currently trading up 19.6% from yesterday's close to $8.65. Shares have been surging over the past ten minutes.

5) Gevo (NASDAQ: GEVO): Shares of Gevo are currently trading up 14.2% from yesterday's close to $16.34. The stock recently hit a 52-week low of $13.47 on June 20th. The stock has lost 37.6% since hitting a 52-week high of $26.36 on April 7th.

Other Notable Gainers

E-Commerce China Dangdang (NYSE: DANG): Shares of E-Commerce China Dangdang are currently trading up 12.3% from yesterday's close to $11.67. An article highlighting the company was published by Seeking Alpha today, which can be found here.

Companhia Brasileira de Distribuicau (NYSE: CBD): Shares of Companhia Brasileira are currently trading up 12.5% from yesterday's close to $46.60. The company announced a possible merge with the Brazillian unit of Carrefour SA. The combined entity would control 27% of the Brazilian grocery market. The stock hit a 52-week high of $46.45 in today's action.

Westport Innovations (NASDAQ: WPRT): Shares of Westport Innovations are currently trading up 11.3% from yesterday's close to $23.94. The company entered into an agreement with General Motors (NYSE: GM) to pursue advanced natural gas engine technology for light duty vehicles. The stock broke above its 50-day simple moving average (one year daily chart) in today's action.

iSoftStone Holdings (NYSE: ISS): Shares of iSoftStone are currently trading up 10.9% from yesterday's close to $15.05. The company was initiated with a Buy at Jefferies. The stock has gained 34.8% since hitting a 52-week low of $9.80 on June 13th.

Worst

1) China Transinfo Technology (NASDAQ: CTFO): Shares of China Transinfo Technology are currently trading down 9.2% from yesterday's close to $3.46. The stock started the day in positive territory, but heavy buying volume began pummeling shares at 12:25pm. The stock has gained 65.7% since hitting a 52-week low of $2.07 on June 20th.

2) Zhongpin (NASDAQ: HOGS): Shares of Zhongpin are currently trading down 7.6% from yesterday's close to $9.89. The stock hit a 52-week low of $9.03 in yesterday's trading session. The year-to-date performance of Zhongpin has been a loss of 51.6%.

3) Clean Diesel Technologies (NASDAQ: CDTI): Shares of Clean Diesel Technologies are currently trading down 7.5% from yesterday's close to $4.06. The stock has lost 53% since the beginning of June.

4) AbitibiBowater (NYSE: ABH): Shares of AbitibiBowater are currently trading down 7% from yesterday's close to $20.36. TD Newcrest downgraded the company from Buy to Hold. The stock hit a 52-week low of $20.25 in today's action. The year-to-date performance of AbitibiBowater has been a loss of 14.1%.

5) AirMedia Group (NASDAQ: AMCN): Shares of AirMedia Group are currently trading down 6.9% from yesterday's close to $3.25.

Other Notable Losers

XOMA (NASDAQ: XOMA): Shares of XOMA are currently trading down 6.5% from yesterday's close to $2.42. The stock has already traded nearly three times its average daily volume.

Dice Holdings (NYSE: DHX): Shares of Dice Holdings are currently trading down 5.7% from yesterday's close to $12.79. The stock broke below its 200-day simple moving average (one year daily chart) in today's session.

MannKind (NASDAQ: MNKD): Shares of MannKind are currently trading down 5.5% from yesterday's close to $3.92. The stock broke below its 50-day simple moving average (one year daily chart) in today's session.

SemiLEDS (NASDAQ: LEDS): Shares of SemiLEDS are currently trading down 6% from yesterday's close to $6.55. The stock hit a 52-week low of $6.33 in today's session.