Chicago Fed President Austan Goolsbee warned Monday that U.S. inflation may no longer be only a story of tariffs and energy supply shocks—and that evidence of strong demand, including AI-related investment, could justify a faster, more front-loaded path of rate increases.

Speaking to the Official Monetary and Financial Institutions Forum in London, Goolsbee said policymakers had been inclined to “look through” supply-side inflation from tariffs and oil on the assumption it would fade. Those pressures have proved persistent, he argued, while services inflation and conversations with business contacts suggest overheating demand is now contributing. If demand is the through line, “the rate response is more aggressive and more and more front-loaded,” he said. AI investment, he added, could be “spilling out of its own lane” and raising aggregate output beyond what the economy can absorb. “If demand overheats, there is no ambiguity about how the Fed needs to respond.”

The comments reinforce hawkish messaging after the Fed’s September 16 quarter-point hike. Chair Kevin Warsh emphasized domestic spending and business investment; the post-meeting statement dropped language blaming elevated inflation mainly on supply shocks including energy, saying simply that “inflation remains elevated.” The Fed’s preferred PCE gauge was 3.7% year over year in July. Goolsbee, not a 2026 FOMC voter, said he remains open to improving supply eventually easing prices—but warned that endlessly deferred peaks in oil, tariffs, and commodity inflation are “not a comforting pattern,” and that without evidence shocks are fading, returning to 2% may require “the hard way” of higher rates and slower growth.

Reuters Morning Bid noted Fed speakers continued hawkish signals even as AI stocks rallied. Markets still expect further tightening this year; Goolsbee’s demand framing raises the stakes for whether sticky services and AI capex keep the Fed biased higher despite softer oil on Hormuz diplomacy hopes.