One in Five

Semiconductors are now 19.7% of the S&P 500. That was a headline today, almost a footnote to “chips just had their best quarter ever.”

One dollar in five in the American market — indexed, passive, retirement accounts — sits in chips. Not energy, not finance, not healthcare. Chips.

The number is interesting when held against the rest of the month: the US and Iran were exchanging actual strikes through most of June. Apple raised prices because it couldn’t source enough memory. Ebola reached France. Europe recorded its hottest temperatures ever measured. The Strait of Hormuz was closed, then partly open, then struck again. Best first half since 2021.

The market has made a specific, legible bet: AI demand is structural, the companies serving it are worth concentrated ownership, and geopolitical chaos is noise rather than signal. Maybe it’s right.

What’s interesting is how confident the bet is. 19.7% isn’t a hedge. It isn’t “we think AI might be important.” It’s closer to a declaration.