Management just traded its wireless spectrum for SpaceX stock, and that's looking like a savvy bet.Shares of satellite cable and wireless company EchoStar (SATS +10.52%) rallied 15.5% on Friday, as of 2:18 p.m. EDT. There was no company-specific news regarding EchoStar's core businesses, which include the upstart Boost Mobile wireless business, a satellite-based broadband business, as well as the declining DISH Network cable business and the over-the-top streaming bundle Sling TV. However, EchoStar's "core" ...