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.
Ambac Financial Group Inc. (ABK US) dropped the most in the Russell 2000 Index, slumping 40 percent to 64.61 cents. The bond insurer said yesterday that a bankruptcy is among its alternatives given that the holding company won’t be receiving dividends from the operating companies that insure bonds.
Anadarko Petroleum Corp. (APC US) tumbled 19%, the most in the Standard & Poor’s 500 Index, to $34.83. Oil continues to gush from BP Plc’s Gulf of Mexico well for a seventh week, after an April 20 explosion aboard the Deepwater Horizon rig owned by Vernier, Switzerland-based Transocean and leased to BP. Anadarko has a 25 percent stake in the well.
BP Plc (BP US) dropped 16 percent, the most since at least 1980, to $29.20. Societe Generale said there is a 50 percent chance the largest oil and natural-gas producer in the Gulf of Mexico won’t make its next quarterly dividend payment.
Discovery Laboratories Inc. (DSCO US) dropped the fourth-most in Russell 2000 Index, slumping 17 percent to 33.3 cents. The biopharmaceutical company said part of the preliminary results from a phase 2 clinical trial of its Surfaxin drug, which treats children with acute respiratory failure, wasn’t statistically significant.
Evergreen Energy Inc. (EEE US) jumped 23 percent, the most since April 14, to 14.8 cents. The green energy technology solutions company got a positive ruling in a case related to its sale of assets in Buckeye Industrial Mining Co., Evergreen said.
FelCor Lodging Trust Inc. (FCH US) gained 11 percent, the most since April 6, to $6.17. The Irving, Texas-based company said its earnings before interest, taxes, depreciation and amortization and its net loss for April and May were “significantly better than the high end of expectations and are trending above current analysts’ expectations for the quarter.”
Oxford Industries Inc. (OXM US) rose 21 percent, the most since March 2009, to $21.93. The maker of Tommy Bahama clothing forecast full-year profit of $1.70 to $1.80 a share, exceeding the $1.50 average estimate of three analysts.
Pall Corp. (PLL US) rose 9 percent to $35.14 for the biggest advance in the S&P 500. The maker of fluid filtration systems reported fiscal third-quarter profit that exceeded analyst estimates. Earnings excluding some items amounted to 58 cents a share, compared with an average estimate of 50 cents in a Bloomberg survey.
Rewards Network Inc. (DINE US) soared 38 percent to $13.67 for the biggest gain in the Russell 2000 Index. Billionaire Sam Zell’s Equity Group Investments LLC, which owns 26.4 percent of the Chicago-based operator of discount dining programs, said in a filing it is interested in acquiring the company for $13.50 a share.