Diodes, East West Bancorp, GLG: U.S. Small-Cap Equity Movers

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The Russell 2000 Index had the steepest gain in two weeks, adding 3.1 percent to 713.39. The Standard & Poor's 500 Index, whose companies have a median market value 22 times larger than the Russell 2000, increased 2.3 percent. The stock indexes have lost 6.9 percent and 7.1 percent, respectively, this year.

Badger Meter Inc. (BMI US) climbed 20 percent to $50, the highest since at least July 1980. The maker of water meters and fluid-control devices reported first-quarter profit from continuing operations was 41 cents a share. The company was expected to earn 33 cents, according to a Bloomberg survey of analysts.

BOK Financial Corp. (BOKF US) rose 12 percent to $57.34, the highest since July 1992. The Tulsa, Oklahoma-based bank was upgraded to ``buy'' from ``neutral'' by SunTrust Robinson Humphrey analyst Jennifer Demba.

CV Therapeutics Inc. (CVTX US) jumped the most since March 2007, climbing 18 percent to $8.76. The drugmaker agreed to sell the rights to half its royalty on North American sales of Lexiscan for as much as $185 million to TPG-Axon Capital.

Diodes Inc. (DIOD US) climbed the most since Dec. 12, gaining

9.2 percent to $25.64. The maker of electronic components used in computers and DVD players was raised to ``outperform'' from ``market perform'' by analyst Harsh Kumar at Morgan Keegan.

East West Bancorp Inc. (EWBC US) fell the most since March 2000, sliding 11 percent to $14.16. The biggest bank serving the Chinese community in the U.S. named Thomas Tolda to replace Julia Gouw as chief financial officer and said first-quarter profit fell 88 percent because of loan losses.

GLG Partners Inc. (GLG US) had the biggest retreat since January 2007, losing 9 percent to $9.10. The hedge-fund firm run by Noam Gottesman and Emmanuel Roman said it was trying to keep a top manager from leaving.

Healthcare Services Group Inc. (HCSG US) dropped 24 percent to $15.57, its biggest decline since July 1986. The housekeeping and laundry services company said it earned 16 cents a share in the first quarter. That trailed the 19-cent average estimate from analysts in a Bloomberg survey.

Kenneth Cole Productions Inc. (KCP US) gained the most since March 24, advancing 4.4 percent to $17.28. The maker of footwear and handbags said Liz Claiborne Inc.'s Jill Granoff will take over as chief executive officer, replacing Kenneth Cole. Granoff was in charge of the Juicy Couture and Kate Spade labels for Liz Claiborne (LIZ US), which dropped 4.9 percent to $16.39.

Knight Capital Group Inc. (NITE US) jumped the most since Jan. 16, adding 12 percent to $16.76. The brokerage that makes markets in 17,000 equities in the U.S. said first-quarter profit increased to 35 cents a share as trading gains outweighed investment losses at its hedge fund unit. The average estimate from analysts in a Bloomberg survey was 30 cents.

Lufkin Industries Inc. (LUFK US) gained 13 percent to $77.19, the highest since November 1990. The seller of pumps used on oil fields said it expects to earn at least $1.30 a share in the second quarter. That exceeded the average estimate of $1.20 from analysts in a Bloomberg survey.

Pinnacle Financial Partners Inc. (PNFP US) gained the most since Jan. 23, adding 12 percent to $26.62. The bank holding company was raised to ``buy'' from ``hold'' by analyst P Carter Bundy at Stifel Nicolaus & Co.

Pozen Inc. (POZN US) soared 28 percent, the most since August 2006, to $13.50. The company and partner GlaxoSmithKline Plc, Europe's largest drugmaker, won U.S. approval to sell their migraine pill Treximet, the companies said.

Talbots Inc. (TLB US) had the biggest decline since its November 1993 initial public offering, falling 29 percent to $9.16. The women's clothing-store chain said HSBC Holdings Plc (HSBA LN) and Bank of America Corp. (BAC US) are canceling their letters of credit to the company.

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