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Chicago Fed President Austan Goolsbee delivered the week’s first big piece of Fed speak on Monday, and he did not soften the message. Speaking at the Official Monetary and Financial Institutions Forum in London, Goolsbee warned that U.S. inflation may have moved beyond the tariff and energy price shocks of the past 18 months and is now being driven by strong demand as well, leaving “no ambiguity” about the need for higher interest rates if that proves to be the case, Reuters reported.

“If demand overheats, there is no ambiguity about how the Fed needs to respond,” Goolsbee said in his prepared remarks, per Reuters.

AI investment is now an inflation story

Goolsbee put a surprising name on the demand pressure: artificial intelligence itself. He said the scale of investment in AI, particularly data center construction, could be “spilling out of its own lane and raising aggregate output beyond what the economy can absorb,” Reuters reported. In other words, the same AI buildout that is lighting up the stock market may also be pushing up prices for construction labor, electricity, and everything around it.

He also flagged elevated inflation in the service sector as evidence that cost pressures are not solely tied to the continuing oil price shock, according to a Reuters summary carried by Stocktwits.

Supply shocks are not fading like they used to

The second half of Goolsbee’s argument cuts against a long-standing central banking habit. Standard practice is to “look through” supply shocks, such as tariffs, oil spikes, and commodity disruptions, on the theory that they are temporary and self-correcting. Goolsbee argued that playbook is failing.

“Oil, tariffs, and commodity prices, forecasters have spent more than a year pushing back the date when inflation was supposed to peak and start falling. That’s not a comforting pattern,” he said. “We need evidence that these shocks are actually fading, or it’s hard to see a credible path back to 2% inflation, and harder still to justify continuing to look through them,” per Reuters.

His bottom line was blunt. With the Fed’s 2 percent target facing inflation estimated most recently for July at 3.7 percent, “in environments like that, the only way back is the hard way,” namely higher interest rates and the risks that poses to growth and jobs, Reuters reported.

Why it matters this week

Context is everything here. The Federal Reserve raised its benchmark rate by a quarter point last week, to a range of 3.75 to 4 percent, and Yardeni QuickTakes notes that fed funds futures now imply roughly a 58 percent chance of another hike at the October meeting. Nine Fed officials are scheduled to speak this week, giving markets plenty of chances to revise those odds.

Goolsbee is the first to set the tone, and his message is that the hiking cycle may not be nearly done. If demand is overheating on top of persistent supply shocks, he said, the implication is a more aggressive and increasingly front-loaded rate response, according to Reuters via IndexBox.

What to watch: New York Fed President John Williams and Fed Vice Chair Philip Jefferson speak at Tuesday’s Treasury Market Conference, followed by Richmond Fed President Tom Barkin in Baltimore, per ZeroHedge’s weekly calendar. If they echo Goolsbee, those October hike odds could move quickly.