Albany Molecular, STEC, Zoltek: U.S. Small-Cap Equity Movers

The Russell 2000 Index fell for a second day, losing 0.2 percent to 724.35. The Standard & Poor's 500 Index, whose companies have a median market value 22 times larger than the Russell 2000, slipped 0.5 percent. The stock indexes have declined 5.4 percent and 4.2 percent, respectively, this year. Share prices are as of the last close.

Albany Molecular Research Inc. (AMRI US) jumped 15 percent, the most since Aug. 10, to $13.21. The medical research contractor said profit for the year may be as high as 42 cents a share, exceeding the average analyst estimate of 33 cents a share.

Alpha Natural Resources Inc. (ANR US) had the steepest gain since Jan. 25, rising 12 percent to $56.34. The coal producer reported first-quarter profit tripled to 39 cents a share, topping the 16-cent average estimate of analysts surveyed by Bloomberg.

INX Inc. (INXI US) had the steepest gain in three years, adding 19 percent to $9.31. The reseller of Cisco Systems Inc. data-networking products reported first-quarter sales that exceeded analysts' estimates.

Marvel Entertainment Inc. (MVL US) rose 9.4 percent, the most since Nov. 5, to $33.10. The movie and comic book producer increased its forecast for 2008 adjusted earnings to $1.35 to $1.55 a share on sales of $370 million to $400 million. Previously, it predicted profit of $1.30 to $1.50 on revenue of $360 million to $400 million.

PeopleSupport Inc. (PSPT US) fell the most since March 7, losing 7.7 percent to $9.64. JMP Group Inc. analysts cut their rating on the provider of business outsourcing services to ``market perform'' from ``market outperform'' on concern the company may lose its contract with JPMorgan Chase & Co.

STEC Inc. (STEC US) gained 15 percent, the most since Jan. 14, to $10.73. The maker of flash-memory devices said second-quarter profit may be as high as 8 cents a share, exceeding the average analyst estimate of 5 cents a share. The company also reported first-quarter earnings that topped estimates.

Zoltek Companies Inc. (ZOLT US) fell the most since April 15, tumbling 8.6 percent to $25.20. Kevin J. Schott resigned as chief financial officer of the carbon fiber manufacturer. The company said some of its financial statements shouldn't be relied upon because of improper payments.

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