Stocks Rising On Strong Volume Might Be Worth A Look (SINA, PPO, EC)

Shares of Sina Corporation SINA, Polypore International Inc PPO, and Ecopetrol S.A. American Deposit EC are all rising on strong volume and might be worth a look for different reasons. Sina is rising today, up strong after the Chinese internet company reported blowout earnings as the World Cup boosted its advertising revenue. Shares of Sina are up $2.63 to $45.45 on almost three times normal volume. Polypore International is up more than 12% today after the battery maker blew out quarterly earnings. The stock is up on $3.00 to $27.19 on more than two times daily volume. Ecopetrol S.A., the Colombian exploration & production company is rising today on double its daily volume on news that BP BP was selling assets to it. Ecopetrol is up 3% in mid-day trading.