Icahn has a long history in the automotive parts and services industry, so this investment could play out in several different ways.

Berkshire Hathaway's B shares and A shares moved 4.5% higher this week after a strong earnings report last weekend.

MP Materials CEO James Litinsky said he doesn't want investors "to get burned," cautioning them about the industry's difficult economics.

On Kalshi, contracts tied to whether the court would rule in favor of Trump's tariffs slipped to around 30% from nearly 50% before Wednesday's hearing.

Joe Marchese, Executive Chairman at Human Ventures, describes a key conundrum facing OpenAI and other AI start-ups as they disrupt the ad tech industry.