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.
Meat processors declined as corn climbed above $5 a bushel for the first time in almost two years. Morgan Stanley said rising grain prices are likely to weigh on companies such as Sanderson Farms Inc. (SAFM US).
Tyson Foods Inc. (TSN US), the largest, sank 6.9 percent to $15.85, second-largest decline in the Standard & Poor’s 500. Smithfield Foods Inc. (SFD US) fell 2.5 percent to $16.64. Sanderson Farms, the fourth-largest U.S. chicken processor, slipped 1.9 percent to $42.40.
Alkermes Inc. (ALKS US) rose 4.6 percent to $14.87, the highest price since August 2008. The company’s alcoholism drug Vivitrol should be cleared as a treatment for opiate addition, outside advisers to the U.S. Food and Drug Administration said.
Arena Pharmaceuticals Inc. (ARNA US) tumbled 47 percent to $1.99 for the biggest decline in the Russell 2000 Index. The San Diego-based company failed to win a U.S. panel’s backing to sell lorcaserin, the experimental diet pill that would be the company’s first drug.
Other diet-pill developers also retreated. Orexigen Therapeutic Inc. (OREX US) slipped 11 percent to $6.05. Vivus Inc. (VVUS US) lost 3.2 percent to $6.06.
Brinker International Inc. (EAT US) slid 6.2 percent, the most since June 7, to $17.65. The operator of Chili’s and Maggiano’s restaurants said Chief Financial Officer Charles M. Sonsteby will resign, effective Oct. 1. Sonsteby will be leaving the company to assume an executive position with a private retail company.
BYD Co. (BYDDF US) climbed 10 percent, the most since Nov. 2, to $6.83. The Chinese automaker backed by Warren Buffett said it will buy an 18 percent stake in Tibet Shigatse Zhabuye Lithium High-Tech Co. for 201.2 million yuan ($30 million).
Caterpillar Inc. (CAT US) rose the most in the Dow Jones Industrial Average, climbing 1.6 percent to $73.15. The world’s largest construction equipment maker said its worldwide retail sales of machines rose 37 percent in the three months ending in August.
Crucell NV (CRXL US) surged 56 percent to $32.02, the highest intraday price ever. Johnson & Johnson is in advanced talks to gain full control of the maker of the Quinvaxem children’s vaccine for about 1.75 billion euros ($2.3 billion) in cash. J&J now holds about 18 percent of Crucell.
Hewlett-Packard Co. (HPQ US) fell the most in the Dow Jones Industrial Average, sinking 3 percent to $39.14. The board of the world’s largest computer maker is nearing a decision on a successor to Mark Hurd as chief executive officer, and is leaning toward picking an internal candidate, according to a person familiar with the matter.
Massey Energy Co. (MEE US) fell 7.5 percent to $29.94 for the biggest retreat in the Standard & Poor’s 500 Index. The coal producer forecast an operating loss for the third quarter and said it expects 2010 operating results at the low end of its projections.
Oracle Corp. (ORCL US) rose the most in the S&P 500, advancing 8.4 percent to $27.48. The world’s second-largest software maker reported first-quarter profit that beat analysts’ estimates as sales of database software and Sun Microsystems server computers helped it capitalize on a recovery in information technology spending.
Student Loan Corp. (STU US) surged 41 percent to $29.87 for the biggest gain in the Russell 2000 Index. The unit of Citigroup Inc. agreed to be bought by Discover Financial Services (DFS US) for $30 a share.
SLM Corp. (SLM US), known as Sallie Mae, will separately purchase $28 billion of securitized federal student loans and related assets from Student Loan Corp., according to a statement. The stock increased 4.5 percent to $11.72.
SouFun Holdings Ltd. (SFUN US) surged 73 percent to $73.50 on the first day of trading. The operator of China’s biggest real-estate website raised $125 million in this month’s first U.S. initial public offering after selling 2.93 million American depositary receipts at $42.50 each.
Thor Industries Inc. (THO US) rose the most in the Russell 1000 Index, advancing 9.9 percent to $27.95. The recreational vehicle maker whose brands include Airstream and Four Winds said it bought privately held Heartland Recreational Vehicles LLC for $100 million of cash and 4.3 million of its stock.
Travelzoo Inc. (TZOO US) climbed 5.9 percent to $24.91, the highest price since July 2007. The Internet travel marketer had its share-price estimate increased to $32 from $22 at Wedbush Securities.