The Los Angeles Business Journal’s index of largest local public companies rose slightly for the week ended Feb. 4, as the markets reacted to a fall in the national unemployment rate.

The weighted LABJ index rose 0.93 percent to 124.63, with decliners outpacing gainers 89 to 81.

Bidz.com Inc. rose 12 percent to $1.37, as the Culver City online jewelry auction company benefitted from an analyst’s upgrade and investor optimism about consumer spending.

Earnings reports were behind many of the largest movers. Ixia jumped 17 percent to $18.50 after the Calabasas telecom test systems provider reported record fourth quarter revenue. Beach Business Bank gained 10 percent to $5.94 after the Manhattan Beach bank also reported a good fourth quarter.

CB Richard Ellis Group Inc. rose 8.4 percent after the Los Angeles real estate services company said its adjusted fourth-quarter profit jumped 34 percent, the best quarter since the commercial real estate slump began.

Among the largest decliners was downtown Los Angeles’ Preferred Bank, which fell 23 percent to $1.49. The commercial bank, which largely targets the Chinese-American market, reported a fourth quarter net loss. La Canada-Flintridge sporting goods chain Sport Chalet Inc. fell 16 percent to $2.50 after reporting a small loss.

Cherokee Inc. in Van Nuys ended the week down 9 percent to $13.90 after the resignation of the apparel branding company’s chief executive and largest shareholder, Robert Margolis.