 Blackstone Inc. BX, 3.76 is selling a 49.9 stake in MGM Grand Las Vegas and the Mandalay Bay in a 5.5 billion deal with Vici Properties Inc. VICI, 1.57 , the majority owner of the two hotels, the Wall Street Journal reported Thursday. Citing people familiar with the deal, the newspaper reported that Blackstone plans to receive 1.27 billion in cash and Vici would assume 3 billion of debt for the two hotels. 