Aswath Damodaran, a respected professor at NYU Stern and valuation expert, has publicly stated that he will not invest in SpaceX's upcoming IPO. In a social media thread, he expressed concerns about the company's inflated valuation of $1.8 trillion, which he believes is excessive compared to his estimated valuation of $1.25-$1.35 trillion. Damodaran criticized SpaceX's total addressable market (TAM) claims, particularly the $26 trillion attributed to artificial intelligence, arguing that a more realistic TAM would be between $3 trillion and $4 trillion. He acknowledged the potential of SpaceX's satellite internet service, Starlink, but warned about the risks associated with the company's governance structure, which he feels lacks necessary safeguards. Additionally, the S&P 500 index announced it would not shorten the seasoning period for new public companies, impacting SpaceX's potential entry into the index. Damodaran emphasized that while he admires SpaceX's vision, he is wary of its ambitious plans.