By Anton Bridge

TOKYO (Reuters) -Technology investor SoftBank Group reports second quarter earnings results on Tuesday in the midst of feverish investment in artificial intelligence that has sent its share price soaring.

But SoftBank’s belief in AI comes with risks amid growing concern of an “AI bubble” that could see SoftBank overextended in companies at eye-watering valuations, repeating some of its debt-fuelled investment mistakes of the past.

For now, analysts have re-rated SoftBank’s share price target up as the wave of investment in artificial intelligence infrastructure such as data centers continues apace and the frontrunners in AI development, such as SoftBank investee OpenAI, project rapid growth.

In April, SoftBank said it would lead a funding round of up to $40 billion in O

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