A US appeals court on Friday rejected the US Federal Trade Commission's request that it order Microsoft to temporarily hold off on closing its $69 billion purchase of "Call of Duty" maker Activision Blizzard.
The FTC had also asked Judge Jacqueline Scott Corley of the US District Court in northern California for a stay but she rejected that request late on Thursday.
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The appeals court decision removes one of the few remaining hurdles stopping Xbox maker Microsoft from expanding its gaming business by closing its deal to buy Activision.
The deal, the largest in the history of the videogame industry, still needs to be approved in Britain.
In the United States, the FTC had argued the deal would hurt consumers whether they played video games on consoles or had subscriptions because Microsoft would have an incentive to shut out rivals like Sony Group. Microsoft responded to that by offering 10-year licenses to rivals.
But on Tuesday, Judge Corley ruled the deal was legal under antitrust law and declined the FTC request to slap a preliminary injunction on it to give the FTC time to take it before an internal FTC judge in August.