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.
Homebuilders declined after the number of contracts to purchase previously owned houses unexpectedly fell in June. Pulte Group Inc. (PHM US) decreased 6.1 percent to $8.43. D.R. Horton Inc. (DHI US) dropped 5.8 percent to $10.60. Lennar Corp. (LEN US) slipped 3.7 percent to $14.62.
Acorda Therapeutics Inc. (ACOR US) gained 6.4 percent to $35.29, the highest level since June 3. The biotechnology company reported a second-quarter adjusted loss of 18 cents a share. On average, the analysts surveyed by Bloomberg estimated a loss of 45 cents.
Atlas Air Worldwide Holdings Inc. (AAWW US) slumped 15 percent, the most since Oct. 26, to $50.24. The biggest U.S. carrier of freight for airlines said yields from its commercial charter business will fall in the fourth quarter from a year earlier while demand and block-hour rates at its AMC unit will “moderate’ for the rest of this year.
Baker Hughes Inc. (BHI US) dropped the most in the Standard & Poor’s 500 Index, sinking 13 percent to $43.66. The world’s third-largest oilfield-services provider reported lower second-quarter earnings than analysts predicted.
Boyd Gaming Corp. (BYD US) lost 8.8 percent, the most since June 7, to $8.22. The casino company reported second-quarter profit excluding some items of 5 cents a share, missing the average analyst estimate in a Bloomberg survey by 50 percent.
Bridgepoint Education Inc. (BPI US) fell 7.5 percent, the most since June 22, to $17.53. Recruiters at U.S. for-profit colleges lied to entice students and encouraged them to commit fraud to qualify for aid, according to a report by the Government Accountability Office.
Calgon Carbon Corp. (CCC US) slumped 8.6 percent, the most since May 2009, to $12.64. The Pittsburgh-based water-purification company posted second-quarter profit of 5 cents a share excluding some items, compared with the average analyst estimate of 21 cents in a Bloomberg survey.
Cognizant Technology Solutions Corp. (CTSH US) jumped 9.4 percent, the most in the S&P 500, to $60.62. The provider of information-technology services forecast third-quarter earnings excluding some items of 63 cents. That compares with the average analyst estimate in a Bloomberg survey of 56 cents.
Corporate Executive Board Co. (EXBD US) rallied 13 percent, the most since February 2006, to $32.01. The Arlington, Virginia-based consulting group increased its full-year forecast after second-quarter profit topped analysts’ estimates.
DaVita Inc. (DVA US) climbed 5.5 percent to $61.10 for the third-biggest gain in the S&P 500. The second-largest U.S. operator of kidney dialysis centers boosted the low end of its full-year forecast, saying it expects to earn at least $970 million in operating income.
Dean Foods Co. (DF US) fell 8.9 percent, the most since May 10, to $10.70. The biggest U.S. maker of dairy products reported second-quarter sales of $2.95 billion, missing the average analyst estimate in a Bloomberg survey of $3 billion.
Dow Chemical Co. (DOW US) lost 10 percent, the most since March 2009, to $25.50. The largest U.S. chemical maker reported second-quarter profit that trailed analysts’ estimates after adverse weather cut demand for seeds and crop chemicals in North America and Europe. Profit excluding some items was 54 cents, less than the 57-cent average estimate of 11 analysts in a Bloomberg survey.
General Cable Corp. (BGC US) slipped 8.4 percent, the most since Feb. 12, to $25.74. The biggest U.S. maker of cable for energy and communications companies posted second-quarter profit excluding some items of 54 cents a share, 1 cent short of the average analyst estimate in a Bloomberg survey.
Helix Energy Solutions Group Inc. (HLX US) rose 8 percent, the most since June 14, to $10.38. The company helping corral oil from BP Plc’s spill posted second-quarter profit of 18 cents a share excluding some items, compared with 12 cents that analysts estimated on average, according to Bloomberg data.
Herbalife Ltd. (HLF US) surged 12 percent to $54.93, the highest intraday price since it went public in December 2004. The seller of nutritional and weight-loss supplements increased its full-year forecast after second-quarter profit exceeded analysts’ estimates.
Hologic Inc. (HOLX US) gained 5.9 percent to $15.44, the highest price since May 19. The maker of mammography equipment reported third-quarter profit excluding some items of 30 cents a share, beating the average analyst estimate in a Bloomberg survey by 1 cent.
IPG Photonics Corp. (IPGP US) jumped 20 percent, the most since December 2006, to $19.97. The producer of high-power fiber lasers and amplifiers forecast third-quarter profit of 19 to 25 cents a share, compared with the 16-cent average estimate of analysts surveyed by Bloomberg.
J.C. Penney Co. (JCP US) fell 8.2 percent, the most since January 2009, to $23.38. The department store operator may say later this week that sales at its stores open at least one year missed its forecast, according to JPMorgan Chase & Co.
Kinross Gold Corp. (KGC US) fell 5.5 percent to $15.45, the lowest price since April 2009. The Canadian gold producer agreed to acquire all the shares of Red Back Mining Inc. (RBIFF US) it doesn’t already own in a transaction with a value of about $7.1 billion.
Red Back jumped 5.7 percent to $26.94.
OfficeMax Inc. (OMX US) dropped 13 percent, the most since April 2009, to $12.96. The office-supply chain said sales this quarter will be “slightly lower” than $1.83 billion a year ago. Analysts on average project $1.86 billion, according to a Bloomberg survey.
Rival Office Depot Inc. (ODP US) lost 2.1 percent to $4.67.
Oplink Communications Inc. (OPLK US) surged 14 percent, the most since April 2009, to $18.81. The maker of fiber-optic equipment forecast first-quarter earnings excluding some items of at least 36 cents a share, beating the 25-cent average analyst estimate in a Bloomberg survey.
Pfizer Inc. (PFE US) rose the most in the Dow Jones Industrial Average, adding 5.6 percent to $16.34. Second-quarter earnings beat analyst estimates after the drugmaker lowered costs and sales were boosted by products from its acquisition of Wyeth. Profit excluding certain items was 62 cents a share, beating the 52-cent average estimate of 15 analysts surveyed by Bloomberg.
Procter & Gamble Co. (PG US) dropped 3.4 percent to $59.94 for the biggest retreat in the Dow average. The world’s largest household-products maker forecast first-quarter profit that fell short of analysts’ projections as some consumers limit spending on name brands. Profit, excluding some items, will be as much as $1.01 a share. That compared with the $1.05-average of estimates compiled by Bloomberg.
Radian Group Inc. (RDN US) slid 20 percent, the most since March 2009, to $7.26. The second-largest U.S. mortgage insurer posted its fourth straight quarterly loss on a charge tied to derivatives. Excluding results from the derivatives, the loss was $1.22 a share, wider than the 78-cent loss that was the average estimate of seven analysts surveyed by Bloomberg.
Sykes Enterprises Inc. (SYKE US) fell the most in Russell 2000 Index, tumbling 22 percent to $11.93. The operator of call centers projected third-quarter profit excluding some items of 26 cents a share at most, short of the average estimate of 43 cents from analysts in a Bloomberg survey.
TNS Inc. (TNS US) slumped 20 percent, the most since November 2008, to $16.04. The provider of data communications to credit-card-payment processors reduced its full-year sales forecast after second-quarter profit excluding some items missed analysts’ estimates.
Vulcan Materials Co. (VMC US) slipped 9.2 percent, the most since November 2008, to $42.56. The maker of construction aggregates, asphalt mix and concrete reported second-quarter sales of $736.2 million, missing the average analyst estimate of $759.5 million in a Bloomberg survey.