Shares in Google owner Alphabet rose 8.8 per cent after a judge ruled against breaking it up – adding £200billion to its value.
The tech giant was last year found to have violating competition rules through having an online search monopoly.
The Department of Justice said it should sell its Chrome browser and Android mobile operating systems.
But US Judge Amit Mehta said that was not necessary, citing the rise of AI tools such as chat bots as emerging competition.
Google was also allowed to keep making payments to partners such as Apple to feature its search engine.
Dan Ives, an analyst at Wedbush Securities, said it was a ‘massive win’ for the two companies.

Overruled: Google’s parent company Alphabet was last year found to have maintained an illegal monopoly in online search that violated competition rules
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