The Mavs’ owner no longer has to concern himself with insider trading accusations: “A federal judge has tossed out the Securities and Exchange Commission’s insider-trading suit against Dallas Mavericks owner Mark Cuban, dealing a stunning defeat to the nation’s securities cop in one of its highest-profile civil actions. Chief Judge Sidney Fitzwater of Dallas said in a 35-page ruling released Friday that the SEC had failed to prove that Cuban entered into a legal agreement not to trade stock in the search engine firm Inc. after learning nonpublic information about the company’s plans to raise more money.”