SoftBank Group has sold its entire stake in Nvidia , the world’s most valuable chipmaker, raising questions about whether the artificial intelligence (AI) boom has reached unsustainable heights. The Japanese conglomerate offloaded roughly 32 million Nvidia shares, worth about $5.8 billion, in October, according to its latest earnings disclosure.

The move comes even as Nvidia remains the biggest winner of the AI surge, with its valuation crossing a record $5 trillion this year on the back of soaring demand for its graphics chips that power AI models like ChatGPT. SoftBank said the sale was not a reflection on Nvidia’s prospects but part of a plan to “reallocate capital” towards new AI ventures — especially OpenAI and large-scale infrastructure projects such as its proposed “Stargate” d

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