Shares of the following companies had unusual moves in U.S. trading. Stock symbols are in parentheses, and times are as of 4 p.m. in New York.
Aluminum producers gained after China stopped selling electricity at discounts to high-consumption companies, including makers of aluminum and ferroalloy.
Allied Nevada Gold Corp. (ANV US) declined 6.9 percent, the most since Feb. 4, to $20.25. The gold producer announced it will sell 13 million shares priced at $21 apiece. Additional stock can dilute the value of existing shares.
Amedisys Inc. (AMED US) fell 8 percent, the most since Sept. 3, to $51.73. The Senate Finance Committee launched an investigation into the practices of Amedisys Inc., one of the nation’s largest home health-care companies, the Wall Street Journal reported. The committee is investigating whether Amedisys, along with LHC Group Inc. (LHCG US), Gentiva Health Services Inc. (GTIV US) and Almost Family Inc. (AFAM US), which also provide in-home therapy visits reimbursed by Medicare, deliberately boosted the number of home therapy visits to trigger higher Medicare reimbursements, the newspaper said.
LHC fell 2.3 percent to $35.28. Gentiva dropped 7.4 percent to $27.55. Almost Family lost 7.6 percent to $39.37.
American Superconductor Corp. (AMSC US) rose 5.2 percent to $30.77, the highest price since April 26. The manufacturer of high-voltage transmission lines forecast full-year earnings per share of as much as $1.20, topping the $1.09 average analyst estimate compiled by Bloomberg. The company also reported fourth-quarter profit and revenue that beat analysts’ estimates.
Cisco Systems Inc. (CSCO US) declined 4.5 percent, the most since March 2009, to $25.53. The world’s biggest maker of networking equipment forecast fiscal fourth-quarter revenue of at least $10.7 billion. While that beat the $10.6 billion average prediction of analysts surveyed by Bloomberg, estimates ranged as high as $11 billion.
Consolidated Graphics Inc. (CGX US) rallied 19 percent, the most since January 2001, to $45.40. Chairman Joe R. Davis bought $7.6 million shares of the commercial printing company earlier this week, boosting his stake by 19 percent, according to the Washington Service.
Con-way Inc. (CNW US) fell 7.7 percent, the most since Dec. 31, to $35.23. The second-largest U.S. trucking company was downgraded to “neutral” from “buy” at Bank of America Corp.
Emergency Medical Services Corp. (EMS US) rose 4.6 percent, the most since March 22, to $57.44. The biggest U.S. operator of ambulance services was raised to “outperform” from “neutral” at Credit Suisse Group AG.
KB Home (KBH US) dropped 6.8 percent, the most since Oct. 28, to $16.53. The Los Angeles-based homebuilder that sells to first-time buyers was cut to “neutral” from “outperform” at Macquarie Group Ltd. RealtyTrac Inc. reported today that U.S. home foreclosures climbed to a record in April.
Kohl’s Corp. (KSS US) fell 5.8 percent to $53.81 for the third-biggest retreat in the Standard & Poor’s 500 Index. The fourth-largest U.S. department-store company said full-year profit will be no more than $3.75 a share, less than the $3.77 average of estimates compiled by Bloomberg.
O’Charley’s Inc. (CHUX US) fell 16 percent, the most since Aug. 6, to $7.80. The operator of restaurants in the U.S. Southeast and Midwest reported a loss of 21 cents a share in the first quarter and said it doesn’t have “sufficient visibility” to provide a projection for the full year.
Prestige Brands Holdings Inc. (PBH US) dropped 19 percent, the most since July 2005, to $7.98. The maker of Clear Eyes drops and Prell shampoo posted fourth-quarter profit excluding some items of 15 cents a share, trailing the average analyst estimate by 28 percent.
RAIT Financial Trust (RAS US) declined 22 percent, the most since March 5, to $2.87. The Philadelphia-based real estate investment company was cut to “underperform” from “market perform” by FBR Capital Markets.
Sprint Nextel Corp. (S US) gained 7.5 percent to $4.46, the highest price since July 28. The third-largest U.S. mobile-phone carrier said it will offer a new brand called Common Cents Mobile at Wal-Mart Stores Inc. (WNT US), seeking to capitalize on the growing consumer appetite for contract-free plans.
Steel Dynamics Inc. (STLD US) advanced 3.5 percent to $15.88, the highest price since April 29. The third-largest U.S.-based steelmaker was raised to “buy” from “neutral” at Longbow Research.
Sybase Inc. (SY US) jumped 14 percent to $64.22, the highest price since it went public in 1991. SAP AG (SAP GY), the world’s biggest maker of business-management software, agreed to buy the company in a deal valued at $5.8 billion to help it fend off competition from Oracle Corp. (ORCL US).
Teradata Corp. (TDC US) gained 4.3 percent to $32.88, the highest price since at least September 2007. The data-storage software company was raised to “outperform” from “market perform” at Oppenheimer & Co.
Wendy’s/Arby’s Group Inc. (WEN US) fell 3 percent to $4.94 for the biggest decline since May 7. The third-largest U.S. fast-food chain reported first-quarter revenue of $837.4 million, trailing the average analyst estimate of 838 million. The company said North American systemwide same-store sales fell 11.5 percent.
Whole Foods Market Inc. (WFMI US) had the second-biggest gain in the S&P 500, rising 5.6 percent to $42.50. The organic- foods grocer boosted its forecast for profit this fiscal year to at least $1.33 a share, compared with the average analyst estimate of $1.25, according to data compiled by Bloomberg.