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.
Akamai Technologies Inc. (AKAM US) had the second-biggest decline in the Standard & Poor’s 500 Index, sinking 5.1 percent to $47.21. The maker of technology that speeds Internet traffic was cut to “market perform” from “outperform” by Oppenheimer & Co.
The brokerage also reduced Limelight Networks Inc. (LLNW US) to “underperform” from “market perform.” Shares of Limelight dropped 11 percent to $6.78.
Amtech Systems Inc. (ASYS US) surged 7 percent to $18.49, the highest price since Nov. 4. The maker of products for manufacturing computer chips and solar cells reported fourth-quarter earnings of 58 cents a share, beating the 33-cent estimate of Merriman Curhan Ford & Co.
Bally Technologies Inc. (BYI US) climbed 6.8 percent, the most since July 2009, to $38.28. The gaming-technology company said it was picked as a preferred vendor by Ontario Lottery and Gaming Corp. and British Columbia Lottery Corp., two of Canada’s largest gambling entertainment providers.
Bucyrus International Inc. (BUCY US) rallied 29 percent to $89.80 for the biggest advance in the Russell 1000 Index. Caterpillar Inc. (CAT US) agreed to buy the mining equipment maker for about $8.6 billion, including net debt. Bucyrus shareholders will receive $92 per share.
Caterpillar had the second-biggest gain in the Dow Jones Industrial Average, adding 1 percent to $81.82. Joy Global Inc. (JOYG US), the maker of P&H and Joy mining equipment, rose 7.5 percent to $77.77.
Ford Motor Co. (F US) rose 4.3 percent to $17, the highest price since January 2004. The automaker gained as General Motors Co. prepared to price its initial public offering on Nov. 17. GM may sell shares above the forecast price range and exercise an option to increase the size of the IPO amid signs of brisk demand, two people familiar with the deal said.
HeartWare International Inc. (HTWR US) jumped 19 percent the most since February 2009, to $86.18. The Framingham, Massachusetts-based company’s implantable pump extended the lives of heart-failure patients in a study.
Thoratec Corp. (THOR US), whose implantable heart device Heartmate II weighs twice as much HeartWare’s pump, had the biggest retreat in the Russell 1000 Index, plunging 20 percent to $24.74.
Isilon Systems Inc. (ISLN US) rose the most in the Russell 2000 Index, surging 28 percent to $33.77. EMC Corp. (EMC US), the biggest maker of storage computers, agreed to purchase Isilon for $2.25 billion to gain video-storage equipment.
Compellent Technologies Inc. (CML US), a storage area network producer, rose 5.9 percent to $24.58.
Makemytrip Ltd. (MMYT US) fell 27 percent to $28.02, the biggest decline since it went public in August. India’s biggest online travel company said it expects sales minus service costs to reach $61 million at most in fiscal 2011. Analysts, on average, estimated revenue of $70.8 million, according to a Bloomberg survey.
Mediacom Communications Corp. (MCCC US) surged 22 percent to $8.37, the highest price since August 2008. The cable television provider, which operates in 1,500 U.S. cities and towns, said it agreed to be bought by founder and Chief Executive Officer Rocco B. Commisso for $8.75 a share in cash, two and a half months after he withdrew his previous bid.
Mela Sciences Inc. (MELA US) advanced 14 percent, the most since June 21, to $6.37. The maker of medical instruments may double its share price from $5.47 should the Food and Drug Administration vote in favor of its MelaFind device this week, Barron’s reported.
Rino International Corp. (RINO US) slid 31 percent, the most since October 2008, to $7.55. The provider of water treatment systems for steelmakers lowered its full-year sales forecast to less than the average analyst estimate. The company also reported third-quarter earnings that missed estimates.
Southern Connecticut Bancorp (SSE US) fell 35 percent, the most since at least January 1992, to $4.06. The bank agreed to terminate its merger agreement with Naugatuck Valley Financial Corp. (NVSL US), according to a joint statement. The companies said they were unable to obtain regulatory approval.
Telestone Technologies Corp. (TSTC US) jumped 23 percent, the most since October 2009, to $14.80. The Chinese maker of wireless gear reported third-quarter revenue that beat Roth Capital Partners LLC’s estimate.
Vanda Pharmaceuticals Inc. (VNDA US) advanced 12 percent, the most since September 2009, to $8.66. The biopharmaceutical company said it received a “positive” ruling from the Internal Revenue Service that will allow the company to offset a portion of its 2010 taxable income with net operating loss carryforwards.