How would an end to the AI boom affect growth?
Core argument: If the AI data center buildout ended and the stock market fell about 30%, the FRB/US model predicts growth would slow to roughly 1½ percent, short of even a shallow recession.
The data center buildout is set to be among the largest investment expansions in peacetime American history. How different is our economy today because of it? The answer, based on a simulation using the large-scale macroeconomic model used by the Federal Reserve (FRB/US), is not much. The buildout by itself has raised GDP by only about 0.3%, because most of the investment is imported, and imports do not add to U.S. GDP or lower the unemployment rate. The stock market boom that came with it matters more—together they have raised GDP by about 0.6% and lowered the unemployment rate by about 0.3 percentage point.This analysis suggests that the economy could survive less data center buildout just fine. Investment would fall, but so would imports and interest rates, and GDP would be little changed. A broader fall in the stock market would be a bigger deal, The bottom line: so far the AI economy is less a story about data centers than about the stock market—and that is also where the risk is.

