Help! My passive fund is aggressively US tech focused
The article explains that many passive, diversified index funds have become heavily concentrated in US tech stocks due to their massive market-cap growth, which can leave investors with unintentional sector and geographical risk despite thinking they hold a balanced portfolio.
Background
Monevator is a well-known UK personal finance blog focused on index investing and the "passive" (buy-and-hold, low-cost) approach.
Passive index funds (trackers) are supposed to give you exposure to the entire market. But market-cap-weighted funds — which hold each company in proportion to its size — have become extremely concentrated: the US now makes up ~60% of the global stock market, and a handful of US tech giants (Apple, Microsoft, Nvidia, Alphabet, Amazon, Meta) dominate. That means any "global" tracker is heavily betting on one country and one sector.
This concentration is uncomfortable for investors who chose passive funds precisely to avoid making active bets. The article weighs the options: stick with a cap-weighted tracker, tilt toward "value" or equal-weight funds, or accept that US tech dominance is simply what the market looks like today. It reflects a long-running debate among passive investors about whether market-cap weighting is truly "passive" or an unintended bet on momentum.