From NPR.

An investment company owned by billionaire Peter Thiel has sold its $100 million stake in chipmaker Nvidia, adding to investors’ fears that the AI industry is in a financial bubble.

Nvidia became the first company to be valued at more than $5 trillion at the end of October. Shares are up 33% overall since the beginning of the year, but prices have since fallen more than 13% in the last few weeks.

Thiel’s selloff comes after SoftBank did the same last week. Together, the moves are stoking investors’ concerns that the AI industry is in a speculative bubble that could soon pop, after tech firms have poured billions into data centers and infrastructure for AI.