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.
Alpha Natural Resources Inc. (ANR US) fell 4.1 percent, the most since March 5, to $15.76. The coal producer said production was halted at its Kingston No. 2 coal mine in Fayette County, West Virginia, after a miner suffered fatal injuries in a March 10 accident.
Anthera Pharmaceuticals Inc. (ANTH US) slumped 45 percent, the most in the Russell 2000 Index, to $3.56. The Hayward, California-based company said it stopped a late-stage trial evaluating its experimental treatment for heart disease because it didn’t work.
Carbo Ceramics Inc. (CRR US) rallied 4.3 percent to $102.23, the highest price since Feb. 2. The maker of ceramic granules was raised to equal-weight from underweight at Morgan Stanley, which said demand concerns are overblown. The Equal-weight rating means Morgan Stanley expects the stock’s risk-adjusted total return in the next 12 to 18 months to be in line with the average for industry companies covered by the analyst.
Dynegy Inc. (DYN US) fell 35 percent to 50 cents, extending a record low. The third-largest independent U.S. power producer’s bankruptcy should be taken over by a court-approved trustee who will better protect creditors, the U.S. Trustee monitoring the case for the federal government said in court papers.
Equifax Inc. (EFX US) had the biggest gain in the Standard & Poor’s 500 Index, climbing 3.4 percent to $44.09. The provider of consumer-credit information was increased to buy from neutral at SunTrust Robinson Humphrey Inc., which said the company is poised to deliver “sustainable above-average” growth in sales and earnings.
Fuelcell Energy Inc. (FCEL US) rose 7.3 percent, the most since Feb. 22, to $1.61. The maker of fuel-cell power plants jumped after Posco, the world’s third-largest steelmaker, agreed to increase its stake in the company.
Harley-Davidson Inc. (HOG US) added 2.6 percent to $48.19, the highest price since December 2007. The biggest U.S. motorcycle maker had its share-price estimate boosted to $50 from $46 by Citigroup Inc., which said the company’s retail sales have increased 16 percent to 18 percent so far in the first quarter.
Orexigen Therapeutics Inc. (OREX US) increased 19 percent, the most since Sept. 21, to $4.39. The drugmaker, which is developing obesity treatments, was raised to buy from neutral at Bank of America Corp.
Pacific Capital Bancorp (PCBC US) rose the most in the Russell 2000 Index, surging 57 percent to $45.03. The Santa Barbara, California-based bank holding company agreed to be bought by UnionBanCal Corp. (UB US), a San Francisco-based bank with $89.7 billion in assets, for $1.5 billion, or $46 a share.
Velti Plc (VELT US) increased 27 percent, the most since January 2011, to $12.49. The mobile phone marketing company reported fourth-quarter revenue of $87.1 million, beating the average analyst estimate of $81.7 million.
Zoll Medical Corp. (ZOLL US) rallied 24 percent to $92.94, the highest intraday price since it went public in July 1992. The Chelmsford, Massachusetts-based maker of devices to help revive patients agreed to be acquired by Asahi Kasei Corp. (3407 JP), a Japanese maker of synthetic fibers and industrial chemicals, for $93 a share, or $2.2 billion.