U.S. wealth has shifted to stocks from homes. There are big reasons to worry.

The composition of U.S. household wealth has shifted notably toward equities and away from real estate, reflecting the scale of the multi-year stock rally. A meaningful driver has been enthusiasm around artificial intelligence, which has lifted valuations for companies tied to the theme and, by extension, the broader market. For many households, that means financial assets now carry more weight in their balance sheets than they did in earlier cycles.

That shift matters for two reasons. First, it increases sensitivity to equity drawdowns: when stocks occupy a larger share of wealth, a market decline transmits more directly to household spending and confidence. Second, the same boom has coincided with a higher cost of money. Rising financing costs can pressure valuations, especially for businesses whose prospects depend on distant earnings, and they can weigh on rate-sensitive sectors such as housing.

What to watch: whether earnings justify current valuations, how interest rates and credit conditions evolve, and whether households treat paper gains as durable wealth or spend against them.