Shares of Vivus Fall +10% Following Piper Jaffray's Downgrade By: Benzinga via Benzinga April 03, 2014 at 13:03 PM EDT Shares of VIVUS (NASDAQ: VVUS) respond to Piper Jaffray analyst Charles Duncan's downgrade from Neutral to Underweight and price target ... Read More >> Related Stocks: Vivus Inc