Stocks On The Move - January 31

Stocks Rise on Heavy Volumn:

• SiRF Technology Holdings Inc. (SIRF): shares of San Jose, CA based global positioning system(GPS) chips maker soared 22.95% to $29.36 per share on strong fourth quarter earning and bullish first quarter outlook. The stock was the leading gainer on Nasdaq today with 15.94 million shares exchanged hands.
• CH Robinson Worldwide Inc. (CHRW): shares of freight transportation services provider surged 21.57% to $53.2 per share as the company's fourth quarter earnings tops Wall Street expectations. The stock was the third leading gainer on Nasdaq today with 15.36 million shares traded.

Stocks Drop on Heavy Volumn:

• NutriSystem Inc. (NTRI): shares of Horsham, PA based weight loss program provider continue the slide after yesterday's announcement of negative guidance for the first quarter of 2007. Shares tumbled another 15.37% to $44.05 per share. The stock was the fourth decliner on Nasdaq today with 16.63 million shares traded.
• Celestica Inc. (CLS): shares of Toronto, Canada based electronic manufacturing service provider plunged 22.9% to new 52 weeks low of $5.96 per share after the company issued disappointing first quarter guidance. The stock was the leading decliner on NYSE today with 13.36 million shares traded.