Shares of the following companies had unusual moves in U.S. trading. Stock symbols are in parentheses and prices are as of 4 p.m. in New York.
Advanced Analogic Technologies Inc. (AATI US) surged 55 percent, the most since at least August 2005, to $6.03. The maker of power-management chips for mobile phones and computers agreed to be bought by Skyworks Solutions Inc. (SWKS US) for $6.13 a share. Skyworks declined 5.7 percent to $25.50.
Aflac Inc. (AFL US) fell 3.2 percent to $48, the lowest price since Aug. 31. The world’s largest seller of supplemental health insurance was cut to “equal weight” from “overweight” at Morgan Stanley, which said the company may see a limit to its capital management opportunities.
America’s Car Mart Inc. (CRMT US) advanced 11 percent, the most since September 2009, to $27.10. The seller of used cars and trucks reported fourth-quarter profit of 78 cents a share, higher than the 68-cent average analyst estimate in a Bloomberg survey.
Babcock & Wilcox Co. (BWC US) climbed 4.6 percent, the most since March 17, to $28.02. The maker of nuclear components to support U.S. defense programs was raised to “buy” from “hold” at Keybanc Capital Markets Inc., which said it expects a return to “normalized quarterly” earnings.
Broadcom Corp. (BRCM US) had the second-biggest gain in the Standard & Poor’s 500 Index, climbing 5.4 percent to $36.52. The maker of semiconductors for wireless headsets and television set-top boxes was added to FBR Capital Markets’ Top Picks list. The stock presented “an attractive and rare value opportunity” for investors, given the company’s growth potential, analyst Craig Berger wrote in a note.
Dresser-Rand Group Inc. (DRC US) gained 5.4 percent, the most since Feb. 25, to $51.67. The maker of equipment for oil and natural gas industries will replace AMB Property Corp. (AMB US) in the Standard & Poor’s MidCap 400 index, S&P said.
Gordmans Stores Inc. (GMAN US) dropped 21 percent, the most since its initial public offering in August, to $17.21. The owner of discount retail department stores said second-quarter revenue will be $116 million to $117 million, falling short of the $122.3 million average projection of analysts surveyed by Bloomberg.
Graham Corp. (GHM US) climbed 12 percent to $23.75, the highest price since April 28. The maker of vacuum and heat transfer equipment posted fourth-quarter earnings of 27 cents a share, beating analysts’ estimates.
Itron Inc. (ITRI US) dropped 5 percent, the most since Feb. 17, to $50.74. The provider of data collection software and hardware for utilities was cut to “underperform” from “neutral” at Robert W. Baird & Co., which said the company won’t be able to get enough new contracts to counter its sales shortfall in 2012.
KV Pharmaceutical Co. (KV/A US) surged 42 percent, the most since Feb. 14, to $3.38. Orbimed Advisors LLC boosted its stake in the drug company to 10.53 percent from 7.23 percent in March.
Marvell Technology Group Ltd. (MRVL US) rose 11 percent, the most since June 2009, to $16.17. The maker of the processor that runs BlackBerry smartphones forecast second-quarter profit of 35 cents to 39 cents a share, excluding some items. Analysts projected 33 cents, according to the average of estimates compiled by Bloomberg.
McClatchy Co. (MNI US) rose 6.9 percent, the most since March 21, to $2.95. The publisher of the Miami Herald sold a 14-acre parcel of Miami land for $236 million to Genting Malaysia BHD, a sale begun six years ago by then-independent Knight Ridder Inc.
Medco Health Solutions Inc. (MHS US) fell 9 percent, the most since October 2008, to $58.66. The largest U.S. pharmacy benefits manager by sales will lose a $3 billion Blue Cross Blue Shield Association contract to CVS Caremark Corp. (CVS US) in 2012, taking almost 5 percent of its revenue. CVS Caremark rose 2.4 percent to $39.05.
Mentor Graphics Corp. (MENT US) fell 8.1 percent, the most since May 2009, to $13.46. The software maker forecast second-quarter earnings of about 5 cents a share, excluding some items, missing the average analyst projection of 17 cents.
Nasdaq OMX Group Inc. (NDAQ US) rose 4.1 percent, the most since May 1, to $25.37. The owner of the second-largest U.S. stock exchange had its “buy” rating reinstated at Goldman Sachs Group Inc., which said the stock is the “most attractive” in the industry. Goldman Sachs had suspended coverage since April 1, as it was among the advisers to NYSE Euronext (NYX US) during IntercontinentalExchange Inc. (ICE US) and Nasdaq’s unsuccessful hostile takeover bid.
OmniVision Technology Inc. (OVTI US) lost 8.9 percent, the most since Feb. 23, to $33.18. The maker of image sensors for camera phones said first-quarter earnings may be as low as 64 cents a share, compared with the average analyst projection of 69 cents a share. Revenue also may fall short of estimates.
Rue21 Inc. (RUE US) surged 15 percent, the most since November 2009, to $32.96. The teen specialty retailer boosted its fiscal year earnings estimate to $1.50 to $1.54 a share. Analysts projected earnings of $1.44, on average, according to data compiled by Bloomberg.
SeaChange International Inc. (SEAC US) gained 12 percent to $11.06, the highest price since April 2005. The provider of digital video systems said an independent advisory committee is evaluating “a range of strategic options.”
Solazyme Inc. (SZYM US) jumped 15 percent to $20.71 on the first day of trading. The developer of oil products from genetically modified algae sold 10.98 million shares at $18 each, raising $197.55 million in an initial public offering.
VirnetX Holding Corp. (VHC US) rose for a fourth day, advancing 4.2 percent to $24.12. The developer of instant-messaging and Internet-calling software was rated “outperform” in new coverage by Cowen & Co., which expects the stock to beat the market by more than 40 percent over the next year because of increased licensing revenue from the company’s patents that enable secure real-time communication.
Weyerhaeuser Co. (WY US) fell 5.4 percent to $20.87, the lowest price since Jan. 10. The second-largest owner of U.S. timberland was cut to “sell” from “hold” by Deutsche Bank AG, which said the outlook is “deteriorating” in most of the company’s businesses.