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.
Amedisys Inc. (AMED US) dropped 16 percent to $24.02 for the biggest retreat in the Russell 2000 Index. The largest U.S. home-nursing provider was asked by federal prosecutors for information related to Medicare reimbursements and billing claims by its 31 Alabama home-health operations.
American Capital Agency Corp. (AGNC US) fell 3.9 percent, the most since June 28, to $26.89. The real estate investment trust said it plans to offer 10 million shares. Additional stock can dilute the value of existing shares.
Arctic Cat Inc. (ACAT US) rallied 18 percent, the most since March 2009, to $10.57. The maker of all-terrain recreation vehicles was raised to “strong buy” from “market perform” at Raymond James Financial Inc.
Broadwind Energy Inc. (BWEN US) soared 27 percent to $1.87, after rising as much as 31 percent, the biggest gain in the Russell 2000. Raymond James & Associates analyst Pavel Molchanov said there was unconfirmed speculation of a General Electric Co. takeover of the maker of wind towers, and such a deal would make “some strategic sense.”
Carmike Cinemas Inc. (CKEC US) advanced 11 percent to $7.96, the highest price since July 27. The operator of digital and 3D movie theaters in 35 states amended an agreement in which Carmike will become a minority shareholder in its advertising partner Screenvision.
Cognex Corp. (CGNX US) rose 16 percent, the most since February 2008, to $26.50. The maker of mechanical vision systems that monitor manufacturing raised its forecast for third quarter revenue to as much as $76 million. Analysts on average estimated $66.7 million, according to a Bloomberg survey.
Corrections Corporation of America (CXW US) climbed 7.4 percent, the most since August 2009, to $24.24. The prison operator increased its third-quarter forecast, projecting earnings of at least 37 cents a share. That topped the average analyst estimate of 32 cents, according to a Bloomberg survey.
Country Style Cooking Restaurant Chain Co. (CCSC US) surged 47 percent to $24.30 on its first day of trading. The operator of fast-food outlets in China raised more than initially sought in an initial public offering. Country Style Cooking sold $82.5 million in American depositary receipts at $16.50 apiece yesterday after originally asking for as much as $14 each, the Chongqing, China-based chain’s Securities and Exchange Commission filings showed.
Endo Pharmaceuticals Holdings Inc. (ENDP US) rallied 8.1 percent to $33.10, the highest price since August 2007. The drugmaker agreed to buy Qualitest Pharmaceuticals, a closely held U.S. generic-drug maker, for about $1.2 billion in cash from private-equity firm Apax Partners LLP.
Flir Systems Inc. (FLIR US) fell 3.7 percent to $25.99 for the second-biggest loss in the Standard & Poor’s 500 Index. The maker of night-vision cameras used by U.S. combat forces was cut to “hold” from “buy” at Benchmark & Co.
InterOil Corp. (IOC US) gained 3.7 percent to $69.77, the highest price since April 26. The Canadian natural-gas explorer and oil refiner said Antelope-2 Horizontal 2A well in Papua New Guinea had shown a 60 percent increase in natural gas flow compared to a test in October 2009.
Monsanto Co. (MON US) fell the most in the Standard & Poor’s 500 Index, sinking 8.1 percent to $48.75. The world’s largest seed company slipped amid concerns that its new SmartStax corn seeds aren’t performing as well as predicted.
Newpark Resources Inc. (NR US) dropped 7 percent, the most since June 1, to $8.09. The drilling-services company said it plans to sell $150 million of notes convertible to stock.
Sterling Financial Corp. (STSA US) advanced 14 percent, the most since June 28, to 68 cents. The bank holding company said regulators terminated a cease and desist order put in place in October 2009.
Super Micro Computer Inc. (SMCI US) climbed 6.7 percent, the most since May 27, to $10.49. The maker of computer servers and accessories will replace Watsco Inc. (WSO US) in the Standard & Poor’s SmallCap 600 index, S&P said.
Versar Inc. (VSR US) rallied 16 percent, the most since June 1, to $3.10. The provider of environmental-testing and remediation services said it won a $5 million, three-year contract from the U.S. Department of Commerce, National Oceanic & Atmospheric Administration.
Walgreen Co. (WAG US) jumped 11 percent to $33.81 for the biggest increase in the S&P 500. The largest U.S. drugstore chain had fourth-quarter adjusted earnings excluding costs related to the Duane Reade acquisition of 53 cents a share. The average analyst estimate in a Bloomberg survey was 44 cents.
CVS Caremark Corp. (CVS US) rose 2.7 percent to $31.45.