U.S. Equity Markets Preview (ARO, CF, LDK, NSM, PLL)

Shares of the following companies should see some unusual movements in trading on Friday, according to Bloomberg.

Aeropostale, Inc. (NYSE: ARO), the specialty retailer of casual apparel and accessories, reported strong fourth-quarter results on Thursday. The retailer said profit in its first quarter will be $0.39-$0.40 per share. The average EPS estimate by analysts polled in a Bloomberg survey is $0.36.

CF Industries Holdings Inc. (NYSE: CF) shares dropped 4.58% to $96 in after-hours trading on Thursday in New York after Agrium, Inc. (NYSE: AGU)announced that it will terminate its $5.4 billion offer for the company later this month. Agrium shares increased 4.82% to $70 in after-hours trading on Thursday.

LDK Solar Co. (NYSE: LDK) rose 2.16% to $7.1 in after-hours trading on Thursday in New York. The company, which manufactures wafers used in solar-power cells, expects fourth-quarter revenue of $300-$310 million. The average revenue estimate by analysts surveyed in a poll by Bloomberg was $302.1 million.

National Semiconductor Corp. (NYSE: NSM) increased 2.37% to $14.68 in after-hours trading on Thursday in New York. The company, which makes chips that control power in electronic devices, expects fourth-quarter sales of at least $375 million. Average analyst estimate surveyed by Bloomberg was of $359.9 million.

Pall Corp. (NYSE: PLL) fell 4.16% to $39.14 in after-hours trading on Thursday in New York. The company, which produces filters for drug makers and refiners, expects 2010 earnings excluding some items of $2.05 per share at most. Average EPS estimate by analysts in a Bloomberg survey is of $2.07 per share.