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.
U.S. airlines slumped as jet fuel rose to the highest price since May. US Airways Group Inc. (LCC US) tumbled 11 percent to $7.89. United Continental Holdings Inc. (UAL US) sank 9.1 percent to $21.24. JetBlue Airways Corp. (JBLU US) declined 8.8 percent to $5.30. Delta Air Lines Inc. (DAL US) fell 7.2 percent to $10.05.
Chelsea Therapeutics International Inc. (CHTP US) fell 21 percent to $2.64, the lowest price since February 2010. The company’s drug to treat a condition that can cause dizziness in people with nervous system disorders may be unsafe and shouldn’t be approved, U.S. regulators said.
CH Energy Group Inc. (CHG US) rose 13 percent to $66.22, the highest price since at least 1980. Fortis Inc. (FRTSF US) said it agreed to buy the parent of New York’s Central Hudson Gas & Electric utility for $65 a share to enter the U.S. market.
Choice Hotels International Inc. (CHH US) advanced 3.6 percent, the most since Nov. 28, to $36.88. The manager of Comfort and MainStay hotels forecast first-quarter earnings of 30 cents a share at least, higher than the average analyst estimate of 28 cents in a Bloomberg survey.
Ciena Corp. (CIEN US) dropped 8.4 percent, the most since Oct. 25, to $15.58. The maker of network gear said first-quarter revenue was about $415 million, below the average analyst estimate of $447.7 million.
Cobalt International Energy Inc. (CIE US) declined 6.1 percent, the most since Dec. 19, to $31.97. The Houston-based deep-water oil explorer reported a fourth-quarter loss of 14 cents a share and said it and its stock holders will offer 47 million shares.
Codexis Inc. (CDXS US) slumped 19 percent to $3.70, the lowest price since it went public in April 2010. Alan Shaw resigned as president and chief executive officer of the company, which makes enzymes used in producing drugs. He will continue to serve as an adviser to the board. The board appointed Peter Strumph, business head of pharmaceuticals, as interim CEO.
Corcept Therapeutics Inc. (CORT US) surged 47 percent to $4.45 for the biggest increase in the Russell 2000 Index. The specialty drug company that hasn’t generated revenue since 2009 won approval for its leading product candidate, a treatment that uses the active ingredient of the abortion pill RU-486 to treat Cushing’s Syndrome.
Ctrip.com International Ltd. (CTRP US) dropped 7 percent, the most since Dec. 8, to $22.96. China’s biggest online travel agency reported fourth-quarter sales that missed analysts’ estimates. Brean Murray Carret & Co. cut the stock to sell from hold.
Frontier Communications Corp. (FTR US) slipped 3.1 percent, the first decline in four days, to $4.63. The phone company serving rural U.S. markets had its share-price estimate cut to $4 from $6 by Bank of America Corp.
GTx Inc. (GTXI US) fell the most in the Russell 2000 Index, plunging 36 percent to $3.69. The developer of a prostate-cancer drug said the Food and Drug Administration has put a hold on clinical trials evaluating Capesaris for primary androgen deprivation therapy for advanced prostate cancer and secondary hormonal treatment.
Hecla Mining Co. (HL US) advanced 9.2 percent, the most since Jan. 3, to $5.48. The largest silver producer in the U.S. had quarterly sales that exceeded the average analyst projection, according to data compiled by Bloomberg.
Mosaic Co. (MOS US) rose 2.3 percent, the most since Jan. 10, to $56.91. The largest U.S. producer of potash is worth more if it’s broken up, Goldman Sachs Group Inc. said, estimating the parts of its business are valued at almost a 40 percent discount to the combined company.
CF Industries Holdings Inc. (CF US), a fertilizer producer rated buy at Goldman, added 3.1 percent to $184.30.
Prestige Brands Holdings Inc. (PBH US) rallied 22 percent, the most since its February 2005 initial public offering, to $16.41. Genomma Lab Internacional (LABB MM Equity) said it would acquire the maker of Comet cleaner and Murine eye and ear solutions for $16.60 per share, valuing the company at $834 million.
RadioShack Corp. (RSH US) fell 7.9 percent to $7.26 for the third-biggest decline in the Russell 1000 Index. The consumer-electronics retailer said it expects a “higher mix of lower margin smartphones” to continue to affect earnings this year.
URS Corp. (URS US) rose 4.5 percent to $44.85, the highest price since July 8. The San Francisco-based construction company agreed to buy Flint Energy Services Ltd. (FES CN) for C$1.25 billion ($1.26 billion) in cash to add projects servicing oil and natural gas producers in Western Canada.
Wal-Mart Stores Inc. (WMT US) fell the most in the Dow Jones Industrial Average, erasing 3.9 percent to $60.07. The world’s largest retailer reported fourth-quarter profit that trailed analysts’ estimates as an emphasis on low prices hurt margins.
Weatherford International Ltd. (WFT US) slid 14 percent, the most since December 2008, to $15.36. The oilfield-services and equipment provider said it hasn’t repaired material weakness in internal controls related to taxes and may restate results for 2008 through 2011.
Wynn Resorts Ltd. (WYNN US) rose the most in the S&P 500, gaining 6 percent to $119.40. The casino operator bought out its largest shareholder stake at a 31 percent discount and asked him to quit the board after a probe by Wynn uncovered allegedly improper payments to Philippine gambling officials.