Jan. 31 (Bloomberg) -- Shares of the following companies may have unusual moves in U.S. trading. Stock symbols are in parentheses, and prices are as of 7:45 a.m. in New York.
Post Holdings Inc. (POST-W US) will replace Comstock Resources Inc. (CRK US) in the S&P MidCap 400 Index, and Comstock will take THQ Inc.’s (THQI US) place in the S&P SmallCap 600 Index, after trading closes on Feb. 3, S&P said.
The change is being made because Ralcorp Holdings Inc. (RAH US) is spinning off Post in a transaction expected to be completed on or about Feb. 3, S&P said in a statement.
Align Technology Inc. (ALGN US): The maker of a teeth- straightening product forecast first-quarter profit excluding some items of no more 21 cents a share, below the average analyst estimate of 22 cents in a Bloomberg survey.
Archer-Daniels-Midland Co. (ADM US) fell 3.1 percent to $28.80. The world’s largest grain processor posted a second- quarter profit that missed analysts’ estimates after oilseed earnings fell and corn costs rose.
Biogen Idec Inc. (BIIB US) retreated 3.1 percent to $113. The world’s largest maker of multiple sclerosis medicines said it sees earnings in 2012 of no more than $6.20 a share, excluding some items, missing the average analyst estimate of $6.31.
Eli Lilly & Co. (LLY US) advanced 1.2 percent to $39.70. The pharmaceutical company whose schizophrenia drug Zyprexa lost patent protection in October said fourth-quarter profit excluding some items was 87 cents a share, beating the 81-cent average of 17 analyst estimates compiled by Bloomberg.
Hologic Inc. (HOLX US): The Bedford, Massachusetts-based maker of X-ray systems raised its 2012 profit forecast to as much as $1.38 a share, more than the average analyst estimate of $1.36 a share.
Mattel Inc. (MAT US) gained 1.2 percent to $29.87. The maker of Barbie dolls reported fourth-quarter profit of $1.07 a share, excluding some items, beating the $1 average analyst estimate.
Parexel International Corp. (PRXL US): The tester of experimental medicines for drugmakers forecast third-quarter earnings of as much as 32 cents a share excluding some items, above the average analyst estimate of 30 cents a share, according to a Bloomberg survey.
Pfizer Inc. (PFE US) increased 1.3 percent to $21.85. The world’s largest drugmaker beat analysts’ earnings estimates as the company’s non-pharmaceutical divisions helped make up for sales losses from generic competition to its best-seller Lipitor. The company lowered its 2012 forecast.
RadioShack Corp. (RSH US) plunged 25 percent to $7.70. The consumer-electronics retailer suspended share repurchases and reported preliminary fourth-quarter earnings that trailed analysts’ estimates. Earnings fell to 11 cents to 13 cents a share last quarter. Analysts projected 37 cents, the average of 19 estimates compiled by Bloomberg. RadioShack cited “underperformance” in the Sprint Nextel Corp. (S US) postpaid wireless business.
Rex Energy Corp. (REXX US): The oil and gas company with operations in the Illinois and Appalachian basin announced plans for a public offering of 7 million ordinary shares. Additional stock may dilute the value of existing shares.
--With assistance from Nikolaj Gammeltoft in New York. Editors: Jeff Sutherland, Joanna Ossinger
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