The Los Angeles Business Journal’s index of the largest local public companies closed up slightly at the end of a short trading week ended April 1. Investors are anticipating an upcoming U.S. employment report to show modest job growth in March.

The weighted LABJ index closed up 0.25 percent 116.94, with decliners outpacing gainers 89 to 86. Markets will be closed on Good Friday.

Among the largest decliners was American Apparel Inc., sliding nearly 18 percent to $3.17. The trendy Los Angeles clothing manufacturer and retailer late last week reported disappointing quarterly earnings.

Great American Group Inc. fell 17 percent to $2.20. The Woodland Hills provider of asset disposition solutions and valuation and appraisal services reported a fourth quarter loss.

DreamWorks Animation SKG Inc. declined more than 12 percent to $37.99 after the Glendale film studio had a lower-than-expected opening weekend domestic box office for its new 3D film, “How to Train Your Dragon.”

Among the top gainers was Response Genetics Inc., a Los Angeles developer of molecular diagnostic tests for cancer. Shares jumped 33 percent to $1.85 after the company reported a 48 percent smaller loss in its fourth quarter.

RadNet, Inc. gained nearly 18 percent to $3.30. The Los Angeles operator of outpatient diagnostic imaging clinics announced the pricing for a $200 million offering of senior notes, proceeds of which will be used to pay down debt and make acquisitions.

CB Richard Ellis Group Inc. rose nearly 15 percent to $16.58 after the Los Angeles real estate services giant received an analyst upgrade.