Fidelity marked up the value of its X Holdings shares by 32.37% in October, the largest monthly increase since helping Elon Musk buy the company in 2022. The big picture: Even with the valuation boost,

Fidelity marked up the value of its holdings in Elon Musk's X by 32.37% in October, Axios reported Sunday, possibly boosted by the social media's stake in xAI.  Despite the markup, Fidelity still values the platform formerly known as Twitter at a 72% discount to the $44 billion Musk purchased it for in 2022.