UnitedHealth Group (UNH) has been one of the most searched-for stocks on Zacks.com lately. So, you might want to look at some of the facts that could shape the stock's performance in the near term.Over the past month, shares of this largest U.S. health insurer have returned -4.4%, compared to the Zacks S&P 500 composite's +2.5% change. During this period, the Zacks Medical - HMOs industry, which UnitedHealth falls in, has lost 4.1%. The key question now is: What could be the stock's future direction?While m ...