The US equity market has been the best trade on the planet for years. Global investors have piled in, and the profits have been, to use a technical term, absurd.
But here’s the thing about trades that work too well for too long: the exit gets crowded. With US ETF assets surpassing $13 trillion by early 2026 and more than $900 billion in equity inflows pouring in over a single year, the concentration of global wealth in American stocks has reached a level that should make anyone with a portfolio pay attention.
The world’s biggest one-way bet
Asian investors alone now hold approximately $4.7 trillion in US bonds and stocks. That’s not a rounding error. That’s a significant chunk of entire national economies parked in a single market.
US equity indices have reached new highs in 2026, powered largely by AI infrastructure spending that has turned companies building the picks and shovels of artificial intelligence into some of the most valuable entities in human history.
