(Corrects direction of earlier move in Teradata item.)

Nov. 4 (Bloomberg) -- The following companies are having unusual price changes in U.S. trading today. Stock symbols are in parentheses, and share prices are as of 12:15 p.m. in New York.

Amylin Pharmaceuticals Inc. (AMLN US) retreated 21 percent to $8.49 and earlier slid 36 percent in the biggest intraday loss since January 1999. The drugmaker got notice that tests of a once-weekly diabetes treatment ``have not met FDA requirements to demonstrate comparability,'' according to a filing by Alkermes Inc. (AKLS US), a partner with San Diego-based Amylin in developing the drug. Alkermes lost 9.9 percent to $9.10.

Archer-Daniels-Midland Co. (ADM US) gained 17 percent to $24.61 and earlier rose 22 percent in the biggest intraday rise since at least July 1980. The world's largest grain processor reported first-quarter profit, excluding some items, of $1.62 a share, beating the average analyst estimate of 72 cents a share, according to Bloomberg data.

Automatic Data Processing Inc. (ADP US) rose 8 percent to $35.93 and earlier advanced to $36, the highest intraday price since Oct. 14. The world's biggest payroll manager posted fiscal first-quarter profit of 54 cents a share, exceeding the average analyst estimate from a Bloomberg survey. The company also reaffirmed its 2009 earnings forecast.

CIT Group Inc. (CIT US) gained the most on the Standard & Poor's 500 Index, adding 33 percent to $6.03. The U.S. Treasury may broaden the scope of its $700 billion rescue package and take equity stakes in bond insurers and specialty finance firms such as CIT, a century-old commercial lender, the Wall Street Journal reported.

General Electric Co.'s GE Capital also may be included, the Journal said. GE (GE US) gained the most on the Dow Jones Industrial Average, climbing 8.2 percent to $20.88.

Coldwater Creek Inc. (CWTR US) slid 19 percent to $2.75 and earlier fell 26 percent, biggest intraday fall since Oct. 24. The clothing retailer for women 35 and older cut its forecast for the third quarter and withdrew its fourth-quarter forecasts, citing the ``unprecedented consumer environment.'' The company also lowered the number of stores it plans to open in 2009 to 15 from 40.

Dean Foods Co. (DF US) slumped 22 percent to $17.19, and earlier fell to $16.25, the lowest intraday price since July 2002. The biggest U.S. dairy processor reported third-quarter profit, excluding some items, of 28 cents a share, missing the average analyst estimate by 9.1 percent, according to Bloomberg data.

Emerson Electric Co. (EMR US) added 8 percent to $35.16 and earlier rose 12 percent, the biggest intraday advance since Oct. 13. The world's largest maker of power equipment for oil companies posted fourth-quarter profit of 88 cents a share, beating the average analyst estimate by 2.2 percent. Emerson said fourth-quarter profit increased 10 percent as it won contracts to provide software that helps manage plants in China and Thailand.

Expeditors International of Washington Inc. (EXPD US) gained 22 percent to $39.07 in the biggest intraday advance since its initial public offering in September 1984. The cargo shipments manager reported third-quarter profit of 39 cents a share, topping the 37-cent average estimate of analysts surveyed by Bloomberg.

FirstEnergy Corp. (FE US) added 5.9 percent to $56.36 and earlier jumped to $58.15, the highest intraday price since Oct. 14. The owner of electric utilities in Ohio, Pennsylvania and New Jersey reported third-quarter profit, excluding some items, of $1.54 a share, beating the average analyst estimate by 7.5 percent according to Bloomberg data. Profit increased on higher prices, the company said.

Fluor Corp. (FLR US) gained 13 percent to $42.40 and earlier advanced 16 percent for the biggest intraday rise since Oct. 13. The largest publicly traded U.S. engineering firm was added to the focus list at JPMorgan Chase & Co., which said the short-term and long-term fundaments of its oil, gas and power business ``remain strong.''

Herbalife Ltd. (HLF US) fell 20 percent to $20.46 and earlier slid 32 percent, the steepest intraday decline since its initial public offering in December 2004. The seller of nutritional and weight-loss supplements lowered its forecast for the year to below analyst estimates, citing foreign exchange rates. The company also forecast 2009 earnings below estimates.

Graftech International Ltd. (GTI US) added 5.7 percent to $8.78 and earlier advanced to $9.48, the highest intraday price since Oct. 14. The maker of products used in steel and aluminum production reported third-quarter profit, excluding some items, of 55 cents a share, beating the average analyst estimate of 43 cents, according to Bloomberg data.

Kenexa Corp. (KNXA US) fell 20 percent to $7.12 and earlier dropped 33 percent in the biggest intraday slide in a year. The employee recruiter was cut to ``hold'' from ``buy'' at Jefferies Group Inc., which cited falling margins and disappointing third- quarter earnings, excluding some items. Jefferies also cut its price target and earnings estimates.

Mastercard Inc. (MA US) rallied 14 percent to $164.20, and gained 15 percent earlier, the biggest advance since Oct. 13. The world's second-biggest credit-card network posted third-quarter profit excluding some items of $2.47 a share, exceeding the average analyst estimate by 11 percent. A settlement with Discover Financial Services allows Mastercard to focus on expanding credit and debit-card revenue amid the economic slowdown.

Orient-Express Hotels Ltd. (OEH US) lost 15 percent to $9.99 and earlier slid 18 percent in the biggest intraday drop since September 2001. The owner of more than 40 hotels posted third- quarter earnings excluding some items that missed the average analyst estimate. The company also said it will suspend its quarterly dividend and defer $30 million in capital spending for 12 months.

Osiris Therapeutics Inc. (OSIR US) gained 15 percent to $17.75 and earlier rose 27 percent in the biggest intraday climb since March 2007. The company will receive as much as $1.38 billion from Genzyme Corp. (GENZ US) to develop two experimental drugs using adult stem cells, the companies said in a statement.

Genzyme added 1.4 percent to $74.55.

Otter Tail Corp. (OTTR US) slumped 3.8 percent to $23.05 and fell 7.4 percent earlier, its steepest intraday decline since Oct. 22. The provider of electricity and energy services in the upper Midwest cut its 2008 earnings estimates, citing economic conditions. The company had lowered the forecast twice before, once in August because of ``growing pains'' from its wind tower unit and an adverse energy rate ruling and once in September because of cooler weather and increased startup costs.

PPL Corp. (PPL US) retreated 12 percent to $28.42 and earlier slid 15 percent in the biggest intraday fall since October 1987. The owner of Pennsylvania's second-biggest utility reported third-quarter profit, excluding some items, of 46 cents a share, missing the average analyst estimate of 61 cents a share, according to Bloomberg data. PPL cut its full-year forecast, partly on lower energy margins.

Principal Financial Group Inc. (PFG US) rose 21 percent to $27.11, and traded at $28.83 earlier, the highest intraday price since Oct. 7. The life insurer that cut its dividend in half last month is eligible to participate in ``certain government programs'' as its holding company is regulated as a savings and loan, Chief Executive Officer Larry Zimpleman said.

Royal Bank of Scotland Group Plc American depositary receipts (RBS US) slid 8.8 percent to $1.04, and earlier declined 16 percent, the steepest intraday drop since Oct. 24. The Edinburgh-based bank waiting to take up the U.K.'s biggest bank bailout abandoned a full-year profit forecast as credit-market losses worsened and bad loans rose. Chief Executive Officer Stephen Hester said the company may have a full-year loss.

Sun Hydraulics Inc. (SNHY US) declined 18 percent to $16.46 and earlier dropped 24 percent in the biggest intraday fall in three years. The maker of screw-in hydraulic cartridge valves and manifolds forecast 2008 earnings below the average analyst estimate.

Talisman Energy Inc. (TLM US) advanced 12 percent to $11.07 and earlier rose to $11.16, the highest intraday price since Oct. 14. The oil and natural-gas producer with about two-thirds of its reserves in North America or the North Sea said third-quarter profit more than quadrupled on record crude-oil prices and a gain on commodities contracts.

Tenet HealthCare Corp. (THC US) slid 25 percent to $3.07 and earlier plunged to $3.01, the lowest intraday price since at least July 1980. The owner or operator of general acute care and specialty hospitals in a dozen states posted a third-quarter loss excluding some items that missed the average analyst estimate, and said its lowered 2008 earnings forecast reflects a ``weakening economic environment.''

Teradata Corp. (TDC US) rose 9.1 percent to $16.71 and earlier advanced 14 percent in the biggest intraday gain since at least September 2007. The data-storage software business reported third-quarter profit of 36 cents a share, beating the average analyst estimate by 5 percent, according to Bloomberg data.

TNS Inc. (TNS US) retreated 25 percent to $10.16 and earlier fell 41 percent, the biggest intraday slide since the shares began trading in March 2004. The credit-card payment processor cut its 2008 earnings forecast to below the average analyst estimate, citing foreign currency changes.

Viacom Inc. (VIA/B US) climbed 7.3 percent to $21.44 and earlier rose to $22.09, the highest intraday price in three weeks. The media company controlled by Sumner Redstone posted third-quarter profit excluding some items of 55 cents a share, beating the average analyst estimate. The company also reiterated its forecast for full-year adjusted earnings.

To contact the reporters on this story: Elizabeth Campbell in New York at ecampbell11@bloomberg.net; Whitney Kisling in New York at wkisling@bloomberg.net

Last Updated: November 4, 2008 15:33 EST