AI and AI-related stocks now comprise 45% of the S&P 500 (not the NASDAQ), representing an extreme concentration where a single thematic trade dominates the entire broad market.

The combination of AI capex correction + Japanese capital repatriation (Godzilla vs. Giant Robot) could create a two-shoe drop: AI correction causes investors to lose confidence and withdraw from US assets, which then amplifies the repatriation flows, creating a potential spiral of Western asset selling.

Unlike the dot-com overbuild or railroad overexpansion which could eventually be absorbed as economies grew, semiconductor/AI data center equipment has a much shorter useful life: the replacement cost of chips and hardware in a data center is approximately two-thirds the cost of building the entire data center originally, meaning the depreciation cycle is dramatically compressed compared to previous infrastructure booms.

Most Americans cannot easily buy gold despite theoretical interest because regulatory and structural barriers (401k plan restrictions, lack of gold options in typical plans) limit access, and even when options exist, most pension funds refuse to allocate to precious metals.