Mercer Insurance Group Inc. (NasdaqGM: MIGP) jumped in price 47.93 percent to open trading Wednesday at $27.88. Volume of 340,855 squashed its normal daily voume of 4,312. Kendall Law Group announced Wednesday it is investigating Mercer Insurance Group, Inc. for shareholders in connection with the proposed acquisition by United Fire & Casualty Company. The national securities firm’s investigation seeks to determine whether Mercer Insurance Group and its Board breached their fi

Citigroup Inc. (NYSE: C) was the volume leader in early trading Wednesday, exchanging 154,660,124 shares, rapidly catching closing in on its daily average volume of 465,835,000. Citigroup shares were 2.02 percent more expensive at $4.28.

APower Energy Generation Systems Ltd. (NasdaqGS: APWR) saw its share prices fall Wednesday morning by 27.99 percent to $4.58. Early share volume of 3,099,954 shares more than tripled the stock’s full-day average. The Chinese-based power company reported Wednesday revenues decreased 40.7% to $57.3 million from $96.6 million in the third quarter 2009. Gross profit decreased 2.5% to $12.3 million in the third quarter from $12.6 million in the third quarter 2009.