Benzinga's Top Downgrades

Pacific Biosciences of California Inc PACB was downgraded by JP Morgan from "overweight" to "neutral." PACB's shares closed at $9.90 yesterday. PACB's trailing-twelve-month operating margin is -10,359.33%. Collins Stewart downgraded Dolby Laboratories DLB from “buy” to “neutral.” DLB's stock closed at $37.67 yesterday Dolby Laboratories' trailing-twelve-month ROA is 15.60%. Needham downgraded Cogo Group Inc COGO from “strong buy” to “hold.” COGO's shares closed at $4.68 yesterday. COGO's trailing-twelve-month ROE is 7.12%. Morgan Keegan downgraded Diana Shipping inc DSX from “outperform” to “market perform.” DSX's shares closed at $8.53 yesterday. Diana Shipping's PEG ratio is -2.18.