AI’s Macroeconomic Challenges and Promises

In the third quarter of 2025, America's largest tech firms for the first time spent more on capital investment than they earned from operations. The implication is that AI, a technology with the potential to make the economy more productive, is, for now, absorbing resources faster than it is generating returns. This post discusses how the tension between AI's long-run promise and its short-run costs affects the outlooks for inflation, real activity, and financial stability.