Shares of the following companies are having unusual moves in U.S. trading this morning.

AMR Corp. (AMR US) jumped 21 percent to $8.88 for the biggest gain in the Russell 1000 Index. The company's American Airlines unit, the world's second-largest carrier, said it raised $2.9 billion in cash and aircraft financing and will increase flying at four U.S. hubs to focus on the most profitable parts of its network.

UAL Corp. (UAUA US) added 2.3 percent to $9.30. The company's United Airlines, the third-largest U.S. carrier, expects a smaller drop in passenger unit revenue this quarter.

Other carriers also gained as the International Air Transport Association said global airlines are reporting initial signs of a recovery in first- and business-class travel. US Airways Group Inc. (LCC US) climbed 16 percent to $5.08. Mesa Air Group Inc. (MESA US) advanced 11 percent to 35 cents.

ArcelorMittal (MT US) fell 2 percent to $41.17 after dropping as much as 3.5 percent, the most intraday since Sept. 1. The world's largest steelmaker was cut to "hold" from "buy" at Societe Generale.

Discover Financial Services (DFS US) climbed 4.4 percent to $16 after jumping earlier to $16.37, the highest intraday price since Sept. 22. The credit-card lender that took $1.2 billion from the U.S. bank rescue fund said third-quarter profit more than tripled as the company curbed overdue loans and expenses.

Eastman Kodak Co. (EK US) fell the most in the Standard &

Poor's 500 Index, sliding 11 percent to $5.97. The photography company reshaping itself in the digital age said it expects to raise as much as $700 million by selling senior secured notes due in 2017, with KKR & Co. committing to buy more than half of the notes.

First Solar Inc. (FSLR US) increased 4.9 percent to $154.18 after rising earlier to $157.10, the highest intraday price since Aug. 3. The world's largest maker of thin-film solar power modules won a contract to supply Juwi Solar Inc. 27 megawatts of solar panels for two projects in Florida and Ohio.

Headwaters Inc. (HW US) slumped 9.7 percent to $4.01 and fell 12 percent earlier for the biggest intraday decline since July 31. The provider of services to the coal mining industry said it's offering to sell as much as $25 million of shares, raising money to repay debt.

Herman Miller Inc. (MLHR US) dropped 9.1 percent to $17.41 after sinking as much as 13 percent, the most intraday since Nov. 11. The maker of ergonomically designed furniture said profit in the fiscal first quarter decreased to 14 cents a share from 60 cents a year earlier as sales fell.

Hospira Inc. (HSP US) added 3.1 percent to $43.50 after rising as much as 6 percent, the most intraday since June 19. The maker of generic injectable drugs for hospitals boosted its 2009 earnings forecast, predicting earnings excluding some items of at least $2.80 a share. That exceeded the average analyst estimate of $2.76.

Ivanhoe Energy Inc. (IVAN US) rose 16 percent to $2.52 and surged 29 percent earlier, the most intraday since January 2006. The oil and gas exploration and development company said yesterday that consultants found its Pungarayacu heavy-oil field in Ecuador contains as much as 12.1 billion barrels of "oil-in- place."

Nucor Corp. (NUE US) jumped 4.8 percent to $50.40 and advanced as much as 6.2 percent, the most intraday since Aug. 3. The second-largest U.S.-based steel producer was upgraded to "buy" from "hold" at Citigroup Inc. on expectation the company may return to profit in the fourth quarter.

Oracle Corp. (ORCL US) fell 3.3 percent to $21.42 and decreased 3.7 percent earlier, the most intraday since July 2. The world's second-largest software maker reported first-quarter sales that missed analysts' projections after orders remained slow overseas.

Seaspan Corp. (SSW US) advanced 9.6 percent to $10.47 after jumping as much as 14 percent, the most intraday since March 4. The Hong-Kong-based shipper was upgraded to "buy" from "underperform" by Bank of America Corp., which cited price increases by peers and a second consecutive monthly increase in shipping volume at the port of Los Angeles.

Solarfun Power Holdings Co. (SOLF US) rallied 9 percent to $6.76 and climbed earlier to $7, the highest intraday price since Aug. 14. The Chinese maker of solar power components and panels said it expects third-quarter revenue to increase to at least 918 million yuan ($134.5 million) from 854.6 million yuan in the second quarter.

Spirit AeroSystems Holdings Inc. (SPR US) added 7.4 percent to $18.10 after climbing as much as 11 percent, the most intraday since Aug. 27. The maker of airplane wings and bodies was added to Goldman Sachs Group Inc.'s "conviction buy list."

Synovus Financial Corp. (SNV US) fell 10 percent to $3.99 and tumbled 12 percent earlier, the most intraday since July 24. The Georgia-based lender said it's offering to sell 150 million shares at $4 each, raising money to finance daily operations.

XenoPort Inc. (XNPT US) surged 26 percent to $24.90 and rallied 29 percent earlier, the most intraday since April 2007. The developer of a technique to promote drug absorption said that people taking its medicine for pain that follows shingles showed "statistically significant improvements" in a trial.