2019-03-26: Nvidia Gets Boost From Bullish Piper Jaffray Initiation. Benzinga's Top Upgrades, Downgrades For March 26, 2019. NVIDIA shares are trading higher after Piper Jaffray initiated coverage on the stock with an Overweight rating and announced a $200 price target.. Piper Jaffray Sees Opportunity For NVIDIA To Significantly Expand Margins. PiperJaffray Initiates Coverage On NVIDIA with Overweight Rating, Announces $200 Price Target