Nov. 10 (Bloomberg) -- The following companies are having unusual price changes in U.S. trading. Stock symbols are in parentheses, and prices are as of 11:40 a.m. in New York.

Commodity shares gained after China, the biggest contributor to world growth, announced a 4 trillion yuan ($586 billion) plan to sustain its economy.

Alcoa Inc. (AA US) climbed 6.2 percent to $11.88 for the biggest advance in the Dow Jones Industrial Average. Consol Energy Inc. (CNX US) rose 7.1 percent to $29.72. Freeport-McMoRan Copper & Gold Inc. (FCX US) added 5.3 percent to $28.51. Massey Energy Co. (MEE US) advanced 6.1 percent to $20.37. Peabody Energy Corp. (BTU US) jumped 8.5 percent to $31.75.

Allied Capital Corp. (ALD US) dropped 29 percent to $5.16 and tumbled 33 percent earlier for the biggest intraday decline since Sept. 30. The buyout and lending company reported third- quarter profit that missed analysts' average estimate and said it plans to cut dividends for 2009.

American Capital Ltd. (ACAS US) slid 30 percent to $9.67 and earlier plunged 34 percent for the biggest intraday loss since its 1997 initial public offering. The asset manager that invests in management buyouts said it will spend $158 million in stock to buy European Capital Ltd., a fund it spun off in October 2005. American Capital also said it would suspend its dividend for 2008.

American International Group Inc. (AIG US) rallied 17 percent to $2.46 for the biggest gain in the Standard & Poor's 500 Index. The insurer bailed out by the U.S. got an expanded government rescue package valued at more than $150 billion after recording a fourth straight quarterly loss.

Centennial Communications Corp. (CYCL US) more than doubled to $7.82, the biggest advance since its shares began trading in December 1991. AT&T Inc. (T US), fighting Verizon Wireless for control of the U.S. wireless market, agreed to buy Centennial for $944 million to add mobile-phone subscribers.

Clear Channel Outdoor Holdings Inc. (CCO US) fell 17 percent to $4.81 for the biggest intraday loss since Oct. 10. The world's largest billboard owner reported third-quarter earnings and revenue that missed analysts' average estimates.

Dish Network Corp. (DISH US) dropped 12 percent to $13.59 and earlier slid to $13.42, the lowest level in a month. The nation's second-largest satellite-television provider posted third-quarter profit of 20 cents a share, missing the average analyst estimate by 65 percent, according to data compiled by Bloomberg. The company cited subscriber losses and securities impairment charges.

Ecolab Inc. (ECL US) fell 7.3 percent to $33.90 and dropped earlier to $32.72, the lowest level since November 2005. Henkel AG (HEN3 GY), the German maker of Persil detergent, plans to sell a stake of almost a third in the U.S. cleaning-chemicals company valued at $2.66 billion. Ecolab will spend at least $300 million to buy back shares from Henkel and will help to market an underwritten public sale of the remaining stock.

Force Protection Inc. (FRPT US) added 5.5 percent to $2.90 and earlier rose to $3.19, the highest price in a month. The maker of blast-resistant trucks reported third-quarter profit of 29 cents a share, beating the average analyst estimate of 11 cents, according to Bloomberg data. The company said it has developed a new flatbed cargo-transport truck and anticipates an order for as many as 100 of the new vehicles.

General Motors Corp. (GM US) fell the most in the Dow Jones Industrial Average, losing 22 percent to $3.40. The largest U.S. automaker was cut to ``underweight'' from ``equal weight'' at Barclays Plc, which said in any of the potential scenarios it has examined ``current GM equity has little value.'' GM also was lowered to ``sell'' from ``hold'' at Deutsche Bank AG, which set a share-price estimate of zero.

Some auto-parts makers dropped. TRW Automotive Holdings Corp. (TRW US), the world's biggest maker of vehicle-safety parts, fell 19 percent to $4.17. Lear Corp. (LEA US), the No. 2 supplier of car seats, lost 13 percent to $1.73.

MBIA Inc. (MBI US) fell 9.2 percent to $7.25 and earlier slumped to $7.04, the lowest since Oct. 29. The company's bond insurance rating was cut two levels by Moody's Investors Service because of disruptions in the industry and the potential for more mortgage-related losses.

McDonald's Corp. (MCD US) added 2.8 percent to $57.02 for the second-biggest gain in the Dow average. The world's largest restaurant company posted October sales that beat some analysts' estimates after U.S. consumers pinched by rising food bills and unemployment bought double cheeseburgers and other $1 items.

People's United Financial Inc. (PBCT US) added 6.6 percent to $17.74 and advanced earlier to $18.20, the highest level since Oct. 9. The bank holding company was picked to replace Unisys Corp. (UIS US) in the Standard & Poor's 500 Index. Unisys tumbled 22 percent to 71 cents.

Pike Electric Corp. (PEC US) rose 16 percent to $10.19 and earlier added 27 percent in the biggest intraday gain since its July 2005 initial public offering. The powerline contractor in the eastern U.S. reported first-quarter profit, excluding some items, of 54 cents a share, more than the average analyst estimate of 15 cents a share, according to Bloomberg data.

Sterling Construction Co. (STRL US) gained 12 percent to $12.40 and earlier added 17 percent in the biggest intraday rise since Oct. 16. The company specializing in highway paving, bridge and sewer projects posted third-quarter profit, excluding some items, of 44 cents a share, beating the average analyst estimate of 36 cents, according to Bloomberg data.

TriMas Corp. (TRS US) dropped 23 percent to $2.30. The maker of trailer hitches and bicycle racks forecast full-year profit of 71 cents to 75 cents a share, less than its previous estimate of 85 cents to 95 cents.

Tyson Foods Inc. (TSN US) fell 7.1 percent to $6.93 and dropped 19 percent earlier for the biggest intraday loss since Oct. 28. The largest U.S.-based meat producer said fourth-quarter profit excluding some items was 14 cents a share. That missed the average analyst estimate by 24 percent, according Bloomberg data.

To contact the reporters on this story: Lu Wang in New York at lwang8@bloomberg.net

Last Updated: November 10, 2008 11:53 EST