 Invivo Therapeutics NASDAQ:NVIV and ABIOMED NASDAQ:ABMD are both medical companies, but which is the superior stock? We will contrast the two companies based on the strength of their valuation, profitability, risk, earnings, institutional ownership, analyst recommendations and dividends. Insider Institutional Ownership 98.2 of ABIOMED shares are held by institutional investors. 1.5 of Invivo Therapeutics ... 