The Los Angeles Business Journal’s index of largest local public companies closed up for the week.

The weighted LABJ Stock Index closed up 1 percent to 186.79 for the trading week ended May 2. Decliners outnumbered gainers 96 to 54, with 10 companies unchanged.

The biggest decliner was Rubicon Project Inc., falling 32 percent to $14.76. Analysts initiated coverage with mixed recommendations on shares of the Playa Vista Internet advertising company

Among the biggest gainers were CBRE Group Inc. and Rentech Inc., both up 7 percent.

CBRE, the Los Angeles real estate services giant, ended the week at $28.50 after reporting a better-than-expected first quarter.

Rentech, the Los Angeles maker of processed wood products, closed at $2.28 announcing a large acquisition it said would significantly expand its market share.