Thanks to merger rumors that continue to circulate, ValueClick Inc. surged 14 percent this week after talk show host Jim Cramer mentioned the company on his TV show, saying the Westlake Village-based Web ad broker was ripe for an acquisition. Shares closed the week at $28.46.

The stock of Oxnard-based telecom company CalAmp Corp. gained 13 percent after the company was upgraded by analysts. However, the ride may be short the company announced Friday that it expects to post a loss for its fiscal second quarter. Shares closed at $3.87.

Shares in tiny Los Angeles-based computer-aided diagnostic provider Compumed Inc. gained 8 percent after it was awarded a contract by the California Department of Corrections to provide electrocardiogram services at the state’s correctional facilities. Shares closed at a new 52-week high of 54 cents per share.

On the down slide was IndyMac Bancorp., which saw shares slide 14 percent as a weak housing market continued to weigh heavily on the lending industry. Shares closed at $19.61.

The stock of Diodes Inc. lost 4 percent after an analyst said that the credit crunch coupled with declining home equity values could dampen enthusiasm for consumer spending this Christmas. The Westlake Village company makes semiconductor products, many of which go in consumer goods.

Despite saying Friday that it expects to report solid third-quarter earnings on Monday, shares in Mattel Inc. dipped 4 percent for the week after an institutional shareholder accused the El Segundo-based toymaker’s directors of knowingly delaying the announcement of defective toys. Shares closed the week at $22.45, very close to its 52-week low of $20.38 hit one year ago to the day.