Hypercom Corporation (NYSE: HYC) increased 14.85 percent in price soon after the opening at $7.04. Volume was a whopping 10,009,714 shares, compared to a daily average of 753,455. VeriFone Systems Inc. said Wednesday that it has agreed to buy Hypercom Corp. in an all-stock deal valued at about $485 million.

Citigroup Inc. (NYSE: C) traded widely Wednesday, dealing in 139,571,329 shares, compared to its three-month daily average of 473,962,000. The stock’s price slipped 0.95 percent to $4.18. The banking giant said Wednesday it has raised a $600-million collateralized loan obligation for Guggenheim Investment Management LLC, according to people familiar with the deal.

Information Services Group Inc. (NasdaqGM: IIIIU) fell in price in early trading Wednesday by 20.04 percent to $4.15. Volume was 72,715 shares, its three-month daily average not available at press time.