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 Energy Industries Inc. (AEIS US) gained 9.9 percent, the most since July 22, to $14.85. The maker of power conversion systems forecast second-quarter earnings of as much as 44 cents a share, above the average analyst estimate of 38 cents a share in a Bloomberg survey.
Alcoa Inc. (AA US) rose 2.6 percent, the most since April 5, to $17.67, on speculation that Rio Tinto Group (RIO LN) will make a takeover offer for the largest U.S. aluminum producer. Tony Shaffer, a London-based spokesman for Rio, and Michael Belwood, a spokesman for New York-based Alcoa, said separately their companies don’t comment on market speculation.
Avon Products Inc. (AVP US) increased 4.5 percent, the most since June 8, to $30.91. The world’s largest door-to-door cosmetics merchant reported first-quarter sales of $2.63 billion. On average, the analysts surveyed by Bloomberg projected revenue of $2.59 billion.
BioScrip Inc. (BIOS US) surged 32 percent, the most since July 2008, to $5.95. The Elmsford, New York-based pharmacy-benefits manager reported first-quarter adjusted earnings of 5 cents, beating the average analyst estimate of 1 cent.
Bridgepoint Education Inc. (BPI US) rose 8.1 percent, the most since Nov. 2, to $19.87. The for-profit provider of college classes forecast earnings in 2011 of at least $2.47 a share, topping the $2.26 average estimate by analysts.
Chesapeake Energy Corp. (CHK US) fell 5.7 percent, the most since Feb. 4, to $31.33. The most-active U.S. natural-gas driller reported a first-quarter loss after losing $725 million on energy hedging contracts.
Computer Sciences Corp. (CSC US) fell 13 percent, the most in the S&P 500, to $44.03. The provider of computer services to companies and U.S. government agencies said full-year sales and profit probably missed its forecasts.
DineEquity Inc. (DIN US) rose 5.7 percent, the most since Nov. 2, to $52.65. The owner of Applebee’s and International House of Pancakes restaurants reported first-quarter earnings excluding some items of $1.42 a share, beating the average analyst estimate by 22 percent, according to Bloomberg data.
FirstEnergy Corp. (FE US) climbed 6.1 percent, the second-most in the Standard & Poor’s 500 Index, to $42.02. The owner of utilities in Ohio, Pennsylvania and New Jersey said that, excluding some items, it expects to earn $3.20 to $3.50 a share this year. That topped the average analyst estimate of $3.17 in a Bloomberg survey.
Forest Oil Corp. (FST US) slumped 9.2 percent to $32.47, the lowest price since Nov. 3. The Denver-based oil and gas company reported first-quarter adjusted earnings of 19 cents a share, missing the 34-cent average estimate by analysts.
Herbalife Ltd. (HLF US) rallied 13 percent, the most in the Russell 1000 Index, to $102.22. The seller of nutritional and weight-loss supplements forecast second-quarter profit of as much as $1.48 a share, exceeding the average analyst estimate of $1.44 in a Bloomberg survey.
Kulicke & Soffa Industries Inc. (KLIC US) jumped 13 percent, the most since Jan.7, to $10.20. The maker of semiconductor assembly equipment forecast sales in the third quarter of at least $255 million, beating the average analyst estimate of $199 million.
Local.com Corp. (LOCM US) declined 18 percent, the most in the Russell 2000 Index, to $3.67. The operator of an Internet search engine that helps users find local businesses forecast a second-quarter loss of 12 cents a share. Analysts in a Bloomberg survey estimated a profit of 7 cents a share on average.
MetroPCS Communications Inc. (PCS US) rose 10 percent, the most in the S&P 500, to $18.15. The pay-as-you-go mobile-phone carrier reported first-quarter revenue of $1.2 billion, beating the average analyst estimate in a Bloomberg survey by 6 percent.
NetLogic Microsystems Inc. (NETL US) dropped 8.3 percent, the most since Aug. 12, to $39.68. The developer of semiconductors reported first-quarter revenue of $98.7 million, missing the average analyst estimate by 1.8 percent.
Parexel International Corp. (PRXL US) fell 15 percent, the most since August 2011, to $22.96. The tester of experimental medicines for drug-makers forecast 2011 earnings of no more than 94 cents a share excluding some items, missing the average analyst estimate of $1.21 a share, according to a Bloomberg survey.
Pfizer Inc. (PFE US) slid 2.8 percent, the most in the Dow Jones Industrial Average, to $20.44. Lipitor, the world’s biggest drugmaker’s cholesterol pill, had sales of $2.39 billion in the first quarter, falling short of the $2.55 billion average estimate of five analysts surveyed by Bloomberg. Sales will decline by more than half next year after generic-drug makers flood the U.S. market with cheaper copies, according to eight analysts surveyed.
Sears Holdings Corp. (SHLD US) lost 9.9 percent, the most since May 2010, to $75.88. The largest U.S. department-store chain said domestic first-quarter comparable-store sales fell 3.6 percent, led by declines in appliances, apparel and consumer electronics.
Sykes Enterprises Inc. (SYKE US) climbed 6.5 percent, the most since Oct. 25, to $21.20. The operator of call centers forecast revenue in the second quarter of at least $305 million, exceeding the average analyst estimate of $304.4 million.
Vishay Precision Group Inc. (VPG US) rallied 12 percent, the most since Aug. 3, to $18.51. The designer of foil technology products forecast second-quarter revenue of at least $58 million, topping the average analyst estimate of $55.8 million.