Investors continue to increase the private market valuation of SpaceX, of which EchoStar has become a shareholder.Shares of satellite telecommunications company EchoStar (SATS +0.39%) rallied 27.3% this week through Thursday trading, according to data from S&P Global Market Intelligence.EchoStar stock has nearly quintupled this year. Having begun the year as a debt-laden, struggling cable company, EchoStar decided to sell its long-held wireless spectrum assets to other players, and received significantly mo ...