The British competitors watchdog has blocked Microsoft's bid to purchase online game maker Activision Blizzard.

The Competition and Markets Authority (CMA) stopped the $68.7bn (£55bn) deal as a consequence of considerations that it might stifle competitors within the cloud gaming market.

It would have been the file highest value ever paid by a US tech firm in an acquisition.

But in its closing report on Wednesday, the CMA mentioned the transfer was "the only effective remedy" to competitors considerations.

It mentioned: "The deal would reinforce Microsoft's benefit out there by giving it management over necessary gaming content material corresponding to Call of Duty, Overwatch, and World of Warcraft.

"The evidence available to the CMA indicates that, absent the merger, Activision would start providing games via cloud platforms in the foreseeable future.

"The cloud permits UK avid gamers to keep away from shopping for costly gaming consoles and PCs and provides them way more flexibility and selection as to how they play.

"Allowing Microsoft to take such a strong position in the cloud gaming market just as it begins to grow rapidly would risk undermining the innovation that is crucial to the development of these opportunities."

While the all-cash deal was on observe to be the largest within the historical past of the tech business, it additionally faces scrutiny from regulators within the US and Europe.

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Microsoft President Brad Smith mentioned: "We remain fully committed to this acquisition and will appeal."

He mentioned the CMA's resolution "rejects a pragmatic path to address competition concerns" and discourages tech innovation and funding within the UK.

"We're especially disappointed that after lengthy deliberations, this decision appears to reflect a flawed understanding of this market and the way the relevant cloud technology actually works," he added.

Activision mentioned it might "work aggressively with Microsoft to reverse this on appeal".

News of the CMA's resolution despatched shares in Activision Blizzard down 12%

Denting sentiment, Activision Blizzard fell greater than 10% in pre-market buying and selling whereas Microsoft was down 2.25%.