Oct. 31 (Bloomberg) -- The following companies are having unusual price changes in U.S. trading. Stock symbols are in parentheses, and share prices are as of 3 p.m. in New York.

Airlines climbed as crude oil slid, heading for its biggest monthly slump since New York trading began in 1983.

Delta Air Lines Inc. (DAL US) advanced 15 percent to $11.02. Continental Airlines Inc. (CAL US) added 14 percent to $19.30. AMR Corp. (AMR US), which owns American Airlines, gained 14 percent to $10.52. UAL Corp. (UAUA US) increased 13 percent to $14.85. US Airways Group Inc. (LCC US) rose 9.9 percent to $10.25.

Akamai Technologies Inc. (AKAM US) gained 5.7 percent to $14.59 and earlier rose 12 percent in the biggest intraday rise since Oct. 13. The largest supplier of software and services to speed the delivery of Web sites reported third-quarter profit rose 37 percent on increased sales.

Aon Corp. (AOC US) added 10 percent to $41.96 and earlier rose 12 percent in the biggest intraday gain since Oct. 8. The world's biggest insurance broker reported third-quarter profit, excluding some items, of 69 cents a share, beating the average analyst estimate by 5 cents, according to Bloomberg data.

B&G Foods Inc. (BGS US) rallied 26 percent to $3.58 and earlier added 32 percent for the biggest intraday climb since May 2007. The maker of Ortega taco shells and Cream of Wheat cereal was raised to ``neutral'' at Credit Suisse Group AG. The company also said it may buy back as much as $10 million in shares.

Bare Escentuals Inc. (BARE US) declined 30 percent to $4.84 and earlier slid 46 percent for the biggest intraday plunge since shares went public two years ago. The maker of mineral-based cosmetics forecast full-year sales growth of 10 percent, less than a July projection of 15 percent to 20 percent.

Carnival Corp. (CCL US) lost 13 percent to $25.11 and earlier fell 24 percent for the biggest intraday plunge since September 2001. The world's biggest cruise-line company said it will suspend its quarterly dividend. Carnival also said profit may decline in 2009 as bookings slow.

CommScope Inc. (CTV US) declined 25 percent to $15.17 in the biggest intraday retreat since November 2000. The Hickory, North Carolina-based maker of communications equipment for AT&T Inc. (T US) forecast 2008 sales of $4.03 billion to $4.08 billion, less than the $4.13 billion average estimate of analysts surveyed by Bloomberg. The stock was cut to ``neutral'' from ``overweight'' at JPMorgan Chase & Co.

Cummins Inc. (CMI US) retreated 14 percent to $27.29 and earlier fell 18 percent in the biggest intraday loss in a year. The maker of more than a third of North America's heavy-duty truck engines cut its full-year sales forecast because of falling demand in some markets.

Delta Petroleum Corp. (DPTR US) added 6.3 percent to $9.68 and earlier climbed 18 percent for the biggest intraday rise since Oct. 13. Kirk Kerkorian's Tracinda Corp. said it plans to expand its stake in the Colorado oil and natural-gas producer. Tracinda, already the company's largest investor, made a tender offer for up to 14 million shares at $11 each.

Electronic Arts Inc. (ERTS US) lost 17 percent to $23.03 and earlier fell 21 percent for the steepest intraday slide since December 1999. The world's second-largest video-game maker lowered its fiscal-year earnings forecast after reporting a wider second-quarter loss. The company also said it plans to cut 6 percent of its jobs.

Express Scripts Inc. (ESRX US) climbed 9.4 percent to $63 and earlier rose to $63.20, the highest intraday price in two weeks. The third-largest U.S. manager of drug benefits raised its 2008 forecast and predicted higher earnings in 2009, noting the increased use of cheap generic drugs, which leads to higher profits for benefit managers.

Medco Health Solutions Inc. (MHS US), the largest U.S. drug benefits manager, added 4.5 percent to $38.39. CVS Caremark Corp. (CVS US), the second-biggest, advanced 5.7 percent to $30.99.

Huntsman Corp. (HUN US) lost 27 percent to $10.01, the biggest intraday slide since June 19. Hexion Specialty Chemicals Inc. lost a bid in New York court to force Credit Suisse Group AG and Deutsche Bank AG to reconsider financing the takeover of Huntsman, the biggest maker of epoxy adhesives.

J.M. Smucker Co. (SJM US) increased 3.3 percent to $44.93 and earlier gained 6 percent in the biggest intraday rise since Oct. 13. The maker of jams, Crisco shortening and Jif peanut butter will replace Terex Corp. (TEX US) on the Standard & Poor's 500 Index. Terex fell 1.8 percent to $17.25.

JPMorgan Chase & Co. (JPM US) rose the most in the Dow Jones Industrial Average, adding 6.1 percent to $39.93. The largest U.S. bank by market value said it issued $25 billion of preferred stock and warrants to the U.S. Treasury as part of the government's plan to shore up lenders and thaw credit markets.

KLA-Tencor Corp. (KLAC US) rallied 9.1 percent to $23.28 and surged 11 percent earlier in the biggest intraday climb since 2002. Bookings at the second-largest U.S. maker of semiconductor equipment may rebound, FBR Capital Markets Corp. analysts said. KLA-Tencor also beat FBR's estimates for revenue in the fiscal first quarter.

Massey Energy Co. (MEE US) was the third-biggest gainer on the S&P 500, adding 16 percent to $23.70. The fourth-largest U.S. coal-producer reported third-quarter profit excluding some costs that beat the average analyst estimate by 17 percent on greater sales of the power-plant and steelmaking fuel at higher prices.

McAfee Inc. (MFE US) added 15 percent to $31.90 and earlier gained 17 percent for the biggest intraday advance since February 2006. The second-biggest maker of security software reported profit and revenue that beat analysts' estimates on an increase in orders for programs that protect computers and information.

Monster Worldwide Inc. (MNST US) gained 14 percent to $14.69 and earlier rose 17 percent in the biggest intraday advance since February 2006. The operator of the world's biggest online job- search Web site reported third-quarter profit, excluding some items, that topped analysts' average estimate by 19 percent as the company cut costs and squeezed more revenue from the slumping employment market.

Morningstar Inc. (MORN US) slumped 8.4 percent to $36.46 and earlier retreated 23 percent in the biggest drop since its May 2005 initial public offering. The company best known for its five-star mutual-fund ratings reported third-quarter sales growth at the slowest rate since it went public as the customers delayed purchases of financial data and investment-advisory services.

Powerwave Technologies Inc. (PWAV US) slid the most on the Russell 2000 Index, dropping 50 percent to 89 cents. The maker of wireless communications products for Alcatel-Lucent (ALU US) cut its 2008 sales forecast, saying customers have canceled or delayed orders for equipment because of the global credit crisis.

Principal Financial Group Inc. (PFG US) declined 7 percent to $18.66 and earlier fell 23 percent for the largest intraday loss in three weeks. The Des Moines, Iowa-based seller of retirement savings plans was cut to ``sell'' from ``neutral'' at UBS AG, which said the company has ``limited excess capital.''

Protective Life Corp. (PL US) slid 21 percent to $7.90 and earlier fell to $7.33, the lowest intraday price since February 1993. The Alabama-based insurer was lowered to ``sell'' from ``buy'' at UBS AG on losses in its investment portfolio. Analyst Andrew Kligerman also cut the insurer's price target by 74 percent to $6.50 a share.

Sun Microsystems Inc. (JAVA US) slumped 12 percent to $4.65 and earlier fell 15 percent in the biggest intraday loss since Oct. 21. The world's fourth-largest maker of server computers posted its second loss in three quarters as corporate customers cut back spending amid the global credit crunch.

Sunrise Senior Living Inc. (SRZ US) lost 31 percent to $3.05 and dropped 41 percent earlier for the biggest intraday fall in nine years. Health Care REIT Inc. terminated an agreement to buy a 90 percent stake in 29 senior housing properties managed by the Mclean, Virginia-based company because of ``uncertainty in the capital markets.'' Sunrise manages more than 450 retirement communities.

Town Sports International Holdings Inc. (CLUB US) fell 30 percent to $2.42, the biggest intraday drop since the shares began trading in June 2006. The owner of New York Sports Clubs lowered its fourth quarter and 2008 earnings forecast because of the ``worsening consumer spending environment.''

Wynn Resorts Ltd. (WYNN US) added 31 percent to $60.72 and earlier rose to $62.89, the highest intraday price since Oct. 14. The biggest U.S. casino company by market value said third- quarter profit rose 14 percent as increased gambling in Macau made up for declines in Las Vegas. Earnings before certain costs beat the average analyst estimate by 4.4 percent, according to Bloomberg data.

Other casino operators also advanced. Las Vegas Sands Corp. (LVS US) increased 45 percent to $15.06. MGM Mirage (MGM US) climbed 9.9 percent to $16.89. Boyd Gaming Corp. (BYD US) rose 20 percent to $6.90.

International Game Technology (IGT US), the world's largest maker of slot machines, added 15 percent to $13.87.

To contact the reporters on this story: Elizabeth Campbell in New York at ecampbell11@bloomberg.net; Whitney Kisling in New York at wkisling@bloomberg.net.

Last Updated: October 31, 2008 15:34 EDT