By Lu Wang

BLOOMBERG NEWS

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

ADC Telecommunications Inc. (ADCT US) had the steepest decline in Russell 2000 Index, losing 15 percent to $5.64. The maker of equipment for telephone companies forecast first- quarter revenue of $250 million to $275 million, saying spending from clients will drop "considerably." Analysts surveyed by Bloomberg estimated average revenue of $270.4 million.

Aflac Inc. (AFL US) added 1.7 percent to $44.58. The world's largest seller of supplemental health insurance was raised to "overweight" from "equal weight" at Morgan Stanley, which said investment in the industry will focus on "top-line growth" and return-on-equity expansion.

Aruba Networks Inc. (ARUN US) fell 6.3 percent to $8.98 after sinking as much as 8.1 percent, the most intraday since Oct. 28. The builder of wireless networks reported a first- quarter loss of 28 cents a share. The average analyst estimate in a Bloomberg survey was a loss of 4 cents.

Cloud Peak Energy Inc. (CLD US) dropped 3.1 percent to $14.54 on the first day of trading. Rio Tinto Group's coal unit cut the price for its $459 million initial public offering and sold 30.6 million shares at $15 each.

Other coal stocks also slipped. Arch Coal Inc. (ACI US) lost 4.4 percent to $21.92. Consol Energy Inc. (CNX US) declined 5.1 percent to $45.13. Massey Energy Co. (MEE US) erased 2.5

Dell Inc. (DELL US) slipped 9 percent to $14.44 for the second-steepest drop in the Standard & Poor's 500 Index. The world's third-largest maker of personal computers reported third-quarter earnings that missed analysts' estimates after it lost market share and higher PC component costs cut into profit.

Dillard's Inc. (DDS US) added 7 percent to $15.28 and climbed earlier to $15.50, the highest intraday price since Oct. 23. The department-store chain was raised to "buy" from "hold" and its share price estimate increased to $28 from $13.50 at Deutsche Bank AG, which said the company is positioned better than almost all investors estimate to increase earnings based on merchandising and cost control initiatives.

D.R. Horton Inc. (DHI US) dropped the most in the S&P 500, slumping 11 percent to $10.96. The second-largest U.S. homebuilder by revenue reported a fourth-quarter loss of 73 cents per share, three times wider than the average estimate of analysts surveyed by Bloomberg.

Other homebuilders also retreated. Pulte Homes Inc. (PHM US) declined 5 percent to $9.33. Lennar Corp. (LEN US) lost 4.2 percent to $13.57. KB Home (KBH US) slid 3.9 percent to $14.05.

Dress Barn Inc. (DBRN US) surged 7.5 percent to $22.05 and increased earlier to $22.42, the highest intraday price since June 2007. The Suffern, New York-based retailer of women's clothing reported first-quarter earnings of 37 cents a share, 11 percent more than the average analyst estimate in a Bloomberg survey.

DryShips Inc. (DRYS US) fell 4.9 percent to $6.21 and slipped earlier to $6.15, the lowest intraday price since Nov. 10. The Greek owner of deep-water drilling rigs and ships that haul commodities increased the size of its convertible senior notes offering to $400 million from $300 million. The initial conversion price will be $7.19 a share, and the sale is expected to close on November 25.

Hibbett Sports Inc. (HIBB US) climbed 5.1 percent to $19.94 and rose 7.1 percent earlier, the most intraday since Oct. 13. The owner of sporting-goods stores increased its forecast for fiscal 2010, saying it expects to earn at least 95 cents a share. That topped the 92-cent average estimate from analysts.

J. M. Smucker Co. (SJM US) had the second-biggest gain in the S&P 500, adding 5.1 percent to $56.20. The maker of Smucker's jams and Jif peanut butter reported second-quarter earnings excluding some items of $1.22 a share, 18 percent higher than the average analyst estimate.

Kirkland's Inc. (KIRK US) climbed 15 percent to $15.23 for the biggest gain in Russell 2000 Index. The home accessories and gifts retailer said it expects earnings before taxes in fiscal 2009 to be "significantly" higher than the previous year's $10.1 million.

Leap Wireless International Inc. (LEAP US) rose 8.4 percent to $13.82 and rallied 8.8 percent earlier, the most intraday since Oct. 22. MetroPCS Communications Inc. (PCS US), the pay- as-you-go mobile-phone carrier, should purchase smaller rival Leap to "unlock" $2 billion of value, according to analysts at Pali Capital Inc.

MetroPCS rose the most in the S&P 500, adding 5.9 percent to $6.48.

LogMeIn Inc. (LOGM US) declined 8.5 percent to $17.83 after slumping earlier to $17.65, the lowest intraday price since Sept. 25. The provider of Internet connectivity services that let companies do work on remote computers and other devices said it priced 3.13 million shares at $18.50 in a stock offering.

Merck & Co. (MRK US) had the biggest gain in the Dow Jones Industrial Average, adding 2.5 percent to $36.20. The drugmaker said the Committee for Medicinal Products for Human Use of the European Medicines Agency recommended approval of Elonva as a treatment in controlled ovarian stimulation in combination with a GnRH antagonist for the development of multiple follicles in women participating in an assisted reproductive technology program.

Novavax Inc. (NVAX US) fell 11 percent to $3.37 and sank as much as 12 percent, the most intraday since June 5. The vaccine maker said it's offering 6.8 million shares at $3.30 each, raising money to fund research and development.

Taleo Corp. (TLEO US) lost 3.2 percent to $20.33 and slipped earlier to $20.21, the lowest intraday price since Sept. 15. The maker of software used to hire and evaluate employees priced its sale of 6.5 million shares at $20.25 each.

Verigy Ltd. (VRGY US) jumped 8.3 percent to $9.75 and advanced 10 percent earlier, the most intraday since May 22. The maker of semiconductor-testing equipment forecast a first- quarter loss of 9 cents a share at most, narrower than the average estimate of 14 cents by analysts surveyed by Bloomberg.

Wet Seal Inc. (WTSLA US) slid 7 percent to $3.07 after sliding as much as 10 percent, the most intraday since May 29. The apparel chain for teenage girls projected profit of 7 cents a share at most in the fourth quarter, trailing the 8-cent average per-share estimate of analysts surveyed by Bloomberg.

Zumiez Inc. (ZUMZ US) climbed 10 percent to $12.28, and rose 15 percent earlier, the biggest intraday gain since Sept. 3. The specialty sports-apparel retailer reported third-quarter profit of 17 cents a share, beating the average analyst estimate by 21 percent, according to Bloomberg data.