SoftBank Group's quarterly profit doubled, largely due to its significant investment in OpenAI. To fund this $30 billion investment, the company sold its stake in Nvidia for $5.8 billion. Concerns about tech stock valuations are rising as the AI market heats up.

Masayoshi Son sold SoftBank's entire $5.8 billion stake in Nvidia to invest heavily in AI initiatives, including a $30 billion commitment to OpenAI. This move follows a history of risky bets and significant losses, raising questions about his current strategy and market insights. Analysts suggest the sale is not a rejection of Nvidia but a repositioning for future growth.