Stocks on the Move: CareFusion, ICx, OSI Systems

Shares of the following companies are having unusual moves in U.S. trading. Stock symbols are in parentheses and prices are as of 10 a.m. in New York.

Makers of security devices and biometric technologies gained after the Netherlands said it will start using full-body scanners for all U.S.-bound flights following a foiled bombing attempt on a Northwest Airlines plane to Detroit. ICx Technologies Inc. (ICXT) surged 13% to 7.14. OSI Systems Inc. (OSIS) advanced 9.7% to 27.50.

CareFusion Corp. (CFN) fell the most in the Standard & Poor's 500 Index, sliding 2.5% to 25.24. The provider of health-care products and services said parent company Cardinal Health Inc. (CAH) may sell as many as 35.9 million shares in the unit.

China BAK Battery Inc. (CBAK) dropped 14% to 3.12 for the biggest retreat in Russell 2000 Index. Chief Financial Officer Tony Shen said in an interview that the unprofitable Chinese company hasn't won any orders from Google Inc. (GOOG), denying speculation that drove the stock up 63% yesterday.

Kforce Inc. (KFRC) rose the most in Russell 2000 Index, adding 15% to 13.13. The recruitment firm said it was cleared to start working with the U.S. government again following a suspension.

Tessera Technologies Inc. (TSRA declined 10% to 21.41 for the biggest intraday loss since Oct. 30. The company lost a U.S. trade ruling in its efforts to get new licensing revenue from makers of computer-memory chips including Acer Inc. and Nanya Technology Corp.

Trico Marine Services Inc. (TRMA) sank 15% to 4.51 after dropping as much as 20%, the most intraday since May 11. The oilfield service provider said fourth-quarter earnings were hurt by weaker demand in the North Sea and low utilization of vessels.