The Los Angeles Business Journal’s index of largest local public companies rose only slightly for the week ended Jan. 21, despite strong earnings reports boosting the overall markets.

The weighted LABJ index rose 0.25 percent to 123.43, with decliners outpacing gainers 112 to 56.

Reed’s Inc. jumped nearly 12 percent to $2.36. The Los Angeles natural soda maker previewed year-end results in which revenue jumped 34 percent, and said it anticipates minimum top-line growth of 30 percent this year

RadNet Inc. gained 9.6 percent to $3.65 on analysts’ speculation that recent acquisitions will position the Los Angeles medical imaging company for significant growth.

CB Richard Ellis Group Inc. ended the week up 6 percent to $22.59 following media reports that the Los Angeles real estate services giant was a favorite to acquire the majority of ING’s real estate group.

Among the biggest decliners was MannKind Inc., which plunged nearly 39 percent to $5.76. The U.S. Food and Drug Administration told the Valencia biotech that it wouldn’t consider approving its Afrezza insulin inhaler until additional human studies are conducted.

Woodland Hills Internet advertising services provider ReachLocal Inc. slid nearly 21 percent to $21.82. Westlake Village-based market research firm J.D. Power and Associates announced it had hired away ReachLocal veteran Fabien Reille to establish a new, digital research team.

CyberDefender Inc. fell nearly 17 percent to $2.35. The Los Angeles developer of Internet security software pre-announced fourth-quarter revenue at the low end of its earlier guidance and gross sales below its earlier forecast.