When institutional investors are buying stocks, it’s generally seen as a positive sign for those picks. This is because institutional investors, with their immense resources and research capabilities, tend to invest unemotionally, and only after thorough due diligence by a team of seasoned, experienced market veterans. These institutions tend to be adept at profitable and strategic stock-picking for the long term, and are unlikely to overreact to temporary bouts of volatility. To that end, brokerage firm Goldman Sachs (GS) recently compiled a list of stocks that both hedge funds and mutual fun…