SoftBank, one of the world’s most prominent technology investors, has placed astronomical bets on the future of artificial intelligence. On Tuesday, it said Nvidia is no longer one of them. Japanese billionaire Masayoshi Son’s firm sold its entire stake in the chipmaker at the heart of the AI boom, totalling 32.1 million shares, for $5.8 billion last month. The news reignited concerns among some investors about an AI bubble, but SoftBank said it was merely realigning its bets on the sector. SUBSCRIBE:  Re ...