Hera Hyeonseo Lee: 401(k)s fund AI that cuts jobs

The article traces how the passive-investing revolution, once pitched as a way to spread risk, has instead concentrated many retirement accounts in a small set of giant technology companies. It cites Federal Reserve data showing about 54% of U.S. households have a 401(k), and notes that the vast majority of these plans default into cap-weighted index funds — meaning that as a company like Nvidia grows and takes up more of the S&P 500, the fund automatically buys more of it.

The piece also flags that some of the AI boom's headline numbers are paper gains rather than cash. Lee points to Amazon's $13 billion investment in Anthropic and a first-quarter net income of almost $30 billion, of which almost $17 billion came from an Anthropic mark-to-market gain under a 2016 accounting rule change. She also notes Microsoft extended depreciation schedules for data center equipment. On the market-structure side, the Nasdaq's new fast-entry rule let SpaceX join the Nasdaq 100 in 15 days, a shift from the traditional three-month seasoning period, and the article says such rules will likely matter as Anthropic and OpenAI move toward trillion-dollar-plus IPOs.

The irony the article draws out is that the workers most likely to hold a 401(k) are white-collar employees whose jobs may be threatened by AI. Whether that risk materializes hinges on whether today's concentrated valuations hold — a question the article leaves open, though it notes historical corrections have lasted about a year on average.