CNBC Daily Open: SoftBank goes all in on OpenAI as 'Big Short' investor issues caution on AI firms

Core Insights - SoftBank is selling its entire stake in Nvidia, having sold 32.1 million shares for $5.83 billion in October, but this decision is not driven by concerns over Nvidia's high valuations [1][2][4] Group 1: SoftBank's Stake Sale - The sale of Nvidia shares is significant, amounting to $5.83 billion, indicating a major financial maneuver by SoftBank [1] - The decision to sell is not related to concerns about AI valuations, as per a source familiar with the sale [4] Group 2: Market Reactions and Concerns - The sale could be interpreted as a sign of unease regarding Nvidia's high valuations, especially given SoftBank's previous investment history [2] - Michael Burry has raised concerns about major AI companies potentially understating depreciation of AI chips, which could artificially inflate earnings [3]