SoftBank Group Corp. sold its entire stake in Nvidia Corp. for $5.83 billion to help bankroll AI investments, even as investors question the amount of capital pouring into a technology with uncertain returns.

SoftBank has been making waves in the investment world and has become one of the most significant financial beneficiaries of the current AI boom. Its Vision Fund reported a gain of ¥3.5 trillion in investments, much of which resulted from its OpenAI holdings, and is now estimated to total ¥2.16 trillion for the quarter.