Leading the way was Camarillo-based electronic payment processor Electronic Clearing House Inc., which saw shares surge 82 percent after the company agreed to be bought by financial software developer Intuit Inc. Shares closed the week at $16.53.

The stock of lender Fremont General also got a boost after regulators approved its new management team. Shares in the Santa Monica company gained 47 percent for the week, closing at $4.05.

Last, shares in financial services firm PFF Bancorp Inc. gained 29 percent after FBOP Corp. sought to buy an interest up to 25 percent. Shares in the Rancho Cucamonga bank company closed the week at $13.12.

The stock of Lancaster-based software company Simulations Plus Inc. dipped 15 percent as well after the company announced it was switching stock exchanges and reported tepid preliminary first quarter earnings. Shares closed the week at $4.02.

Finally, shares in Los Angeles-based casual dinning chain owner Ihop Corp. lost 11 percent after investors soured on the entire casual dinning sector. Shares closed the week at $37.59.