Nautilus Inc. (NYSE: NLS) galloped ahead 23.4 percent in price Wednesday to $2.32. Volume of 594,877 shares nearly tripled its daily average. Headquartered in Vancouver, Wash., NLS is a fitness products company providing innovative, quality solutions to help people achieve a healthy lifestyle.

Pfizer Inc. (NYSE: PFE) was busy Wednesday, trading in 62,394,395 shares, beating by half its daily average. Prices for the stock gained 0.7 percent to $18.11.

China Gengsheng Minerals Inc. (AMEX: CHGS) dropped 14.9 percent Wednesday to $3.72, on volume of 6,463,930 shares, 4 1/2 times its daily average. CHGS, a leading China-based high-tech industrial materials manufacturer, today announced that it has entered into definitive agreements with several institutional investors for a registered direct placement of 2,500,000 shares of common stock at a price of $4.00 per share for gross proceeds of $10 million.