By Lu Wang

BLOOMBERG NEWS

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

Alkermes Inc. (ALKS US) advanced 8.6 percent to $8.88 after rising as much as 11 percent, the most intraday since May 5. The developer of an inhaled insulin was raised to "outperform" from "market perform" at Leerink Swan.

Assured Guaranty Ltd. (AGO US) soared 19 percent to $25.18 and climbed earlier to $28.14, the highest intraday price since October 2007. The municipal-bond insurer backed by Wilbur Ross reported third-quarter operating earnings of 44 cents a share, 16 percent better than the average analyst estimate in a Bloomberg survey.

MBIA Inc. (MBI US), the world's largest bond insurer, also gained, rising 5.5 percent to $3.45 for the biggest advance in the Standard & Poor's 500 Index.

Canadian Solar Inc. (CSIQ US) rose 4 percent to $20.48 and increased earlier to $21.05, the highest intraday price since October 2008. The Chinese manufacturer of solar power cells and modules said third-quarter profit more than doubled, beating analyst estimates, on increased shipments to Germany.

CapitalSource Inc (CSE US) climbed 3.2 percent to $3.83 after jumping earlier to $4.10, the highest intraday price since Oct. 14. Omega Healthcare Investors Inc. said it will buy 80 long-term-care facilities for about $565 million in cash and stock from CapitalSource. The purchase price includes an option to acquire

Dillard's Inc. (DDS US) added 8 percent to $14.40 and rose 11 percent earlier, the most intraday since July 23. The department-store chain reported a third-quarter loss of 3 cents a share, 94 percent narrower than the average analyst estimate in a Bloomberg survey

Home Depot Inc. (HD US) fell the most in the Dow Jones Industrial Average, slumping 4.5 percent to $26.40. The largest U.S. home-improvement retailer forecast full-year profit of $1.55 a share. That implies earnings of 15 cents for the fourth quarter, Deutsche Bank AG said in a report. Analysts, on average, expected the company to earn 16 cents in the quarter, according to Bloomberg survey.

InterMune Inc. (ITMN US) dropped 16 percent to $11.72 and slumped 18 percent earlier, the most intraday since March 2007. The developer of a hepatitis-C treatment said it modified an on- going Phase 2b study of ITMN-191 in patients with chromic HCV infection.

Jacobs Engineering Group Inc. (JEC US) fell the most in the S&P 500, losing 12 percent to $39.98. The second-largest publicly traded U.S. engineering company reported fourth-quarter earnings of 63 cents a share, 3.2 percent less than the average analyst estimate of 65 cents in a Bloomberg survey.

Pacific Sunwear of California Inc. (PSUN US) plunged 30 percent to $3.52 for the steepest drop in Russell 2000 Index. The athletic apparel retailer posted a loss excluding some items of 17 cents a share in the third quarter, 21 percent wider than the average analyst estimate, according to Bloomberg data.

Playboy Enterprises Inc. (PLA US) fell 18 percent to $3.94 and dropped as much as 19 percent, the most intraday since November 2008. The magazine publisher said Linda G. Havard decided to step down as executive vice president and chief financial officer, effective Dec. 31. Separately, Golden Gate Capital said it isn't involved with a potential acquisition of the company.

Palm Inc (PALM US) added 5.2 percent to $12.47. The maker of the Pre touch-screen phone was raised to "buy" from "hold" at Kaufman Bros.

Saks Inc. (SKS US) gained 6.4 percent to $6.82 and advanced 10 percent earlier, the most intraday since Aug. 7. The luxury retailer had a third-quarter profit of 1 cent a share, compared with the average analyst estimate of a loss of 11 cents a share in a Bloomberg survey.

Semitool Inc. (SMTL US) rose the most in the Russell 2000 Index, rallying 30 percent to $10.94. Applied Materials Inc. (AMAT US), the world's largest maker of semiconductor equipment, agreed to buy Semitool for about $364 million, or $11 a share, to upgrade its technology used in the preparation of silicon wafers.

Sina Corp. (SINA US) climbed 9.3 percent to $46.89 and jumped earlier to $47.95, the highest intraday price since June 2008. China's biggest Internet portal reported third-quarter earnings that topped some analysts estimates and said it expects profit margins to improve next year as the country's rising online demand helps lift advertising revenue.

Smith International Inc. (SII US) lost 9.2 percent to $27.93 and slumped 11 percent earlier, the most intraday since March 20. The oilfield contractor said it's offering 28 million shares, raising money to pay back debt and fund potential acquisitions or investments. The creation of additional shares may dilute earnings for existing shareholders.

Sprint Nextel Corp. (S US) added 4.9 percent to $3.67 and increased earlier to $3.73, the highest intraday price since Oct. 9. The third-largest U.S. mobile-phone carrier added to a 13 percent gain yesterday, when it said it paid off $1 billion of debt, cleaning up its balance sheet as revenue declines.

SunPower Corp. (SPWRA US) had the biggest decline in the Russell 1000 Index, dropping 19 percent to $22.18. The second- biggest U.S. supplier of solar modules reported that a review of some accounting entries appeared to contain errors.

SVB Financial Group (SIVB US) fell 4 percent to $41.14 and erased 5.6 percent earlier, the most intraday since Aug. 11. The owner of California's Silicon Valley Bank said it's offering $300 million of stock and plans to use the proceeds to buy back preferred shares and the warrant to purchase common stock.

Tween Brands Inc. (TWB US) gained 9 percent to $9.91 and rallied earlier to $10.16, the highest intraday price since September 2008. The retailer of clothing for girls aged 7 to 14 posted profit excluding some items of 58 cents a share in the third quarter, more than double the average analyst estimate, according to Bloomberg data.

Zoom Technologies Inc. (ZOOM US) surged 22 percent to $9.70 and surged 41 percent earlier, the most intraday since Sept. 14. The maker of equipment for connecting to the Internet boosted its 2009 sales forecast, saying it expects revenue of at least $185 million.