Hauppage Digital Inc. (Nasdaq: HAUP) rushed ahead 34.2 percent in price Thurday to $3.18. Volume of 3,586,458 shares overwhelmed its daily average of 256,305. The world’s leading developer and manufacturer of TV tuner products for personal computers launched its new Colossus internal PCI Express board capable of recording component video and unencrypted HDMI video at up to 1080i from sources such as the Xbox360 and digital SLR cameras.

Citigroup Inc. (NYSE: C) was busy Thursday, trading in 343,135,504 shares, catching up on a full-day average of 541,733,000. Prices for the stock gained 0.3 percent to $4.99.

Pacific Sunwear of California, Inc. (Nasdaq: PSUN) faltered 15 percent to $4.65 on volume of 752,638 shares, catching up on its daily average of 986,812. Pacific announced that its quarter-to-date same-store sales through January 1, 2011 declined 7%. The Company’s fourth quarter and fiscal year ends on January 29, 2011.