Maxim analyst Anthony Vendetti downgraded Helius Medical to Hold from Buy. Published first on TheFly – the ultimate source for real-time, market-moving breaking financial news. Try Now>> See Insiders’ Hot Stocks on TipRanks >> Read More on HSDT: Helius Medical announces CMS reimbursement payment determination Helius Medical announces preliminary results of the PoNSTEP study Disclaimer & DisclosureReport an Issue