Benzinga's Top Upgrades

Analysts at Mizuho upgraded Plantronics Inc PLT from “neutral” to “buy.” PLT's shares closed at $28.95 yesterday. Plantronics' trailing-twelve-month revenue is $713.37 million. Analysts at JMP Securities upgraded Marvell Technology Group Ltd MRVL from “underperform” to “market perform.” MRVL's stock closed at $12.02 yesterday. Marvell Technology's PEG ratio is 0.69. Analysts at RW Baird upgraded Piedmont Natural Gas Co Inc PNY from “neutral” to “outperform.” PNY's shares closed at $30.23 yesterday. Piedmont Natural Gas's trailing-twelve-month operating margin is 15.26%. Stifel Nicolaus upgraded Comerica Incorporated CMA from “sell” to “hold.” CMA's shares closed at $27.98 yesterday. Comerica's trailing-twelve-month profit margin is 17.76%.