In a week where the Dow Jones industrial average dropped 3.7 percent, the Los Angeles Business Journal's index of the 200 largest public companies dipped less than one percent, with 127 of the companies either losing ground or staying flat.

Regional banks and lenders were hit hard this week, with Los Angeles-based First Regional Bancorp dropping 24 percent for the week to $6.40 and hitting a 52-week low of $6.35 on Friday.

Also getting hit was Los Angeles-based bank First California Financial Group Inc., which shed 20 percent to $5.65.

Lastly, shares in Pasadena-based East West Bancorp Inc. dropped 17 percent as well, closing the week at $8.06, while hitting a 52-week low of $7.94 on Thursday.

Gaining the most was Chatsworth-based clean technology manufacturer Capstone Turbine Corp. Shares gained 22 percent to $4.17 after the company said it won a contract to supply parts to a Mexican oil company.

Also moving up was Lancaster-based software developer Simulations Plus Inc., which announced a contract with the Environmental Protection Agency. Shares closed the week up 18 percent to $2.04.

Finally, shares in Los Angeles biotech firm Hythiam Inc. gained 12 percent to $2.73 after the company said a study found its Prometa drug and alcohol treatment program reduced cravings for methamphetamine.

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