The Los Angeles Business Journal’s index of the 200 largest local public companies eked out a slight gain for the week ended Aug. 28, boosted by a series of positive economic indicators, including a rise in consumer spending.

The weighted LABJ index closed up more than 2 percent to 104.71, with gainers outpacing decliners 100 to 75.

Capstone Turbine Corp. jumped 30 percent to $1.33 after the Chatsworth manufacturer announced several new orders for its microturbine energy systems.

Los Angeles real estate developer Thomas Properties Group Inc. gained 23 percent to $2.24 after its board declared a quarterly cash dividend of 1.25 cents per share.

Los Angeles apparel maker Guess Inc. rose 17.6 percent to $35.46 on a strong third quarter earnings report and outlook.

Among the largest decliners for the week was Hawthorne security and health care scanner maker OSI Systems Inc., which dropped 16 percent to $16.97 on a worse-than-expected fourth quarter financial report.

Burbank online horse betting company Youbet.com Inc. dropped 13.5 percent to $2.11 after a Brean Murray analyst downgraded shares from “buy” to “hold”.