Market sees next Fed hike in October, following Barr comments and hot inflation reading

The Federal Reserve's October rate-hike probability surged after Vice Chair for Supervision Michael Barr expressed support for tightening and S&P Global reported its composite inflation gauge reached the highest level since October 2022.

Markets had largely priced out additional rate increases following the Fed's July hike, but Wednesday's developments shifted trader positioning. S&P Global's inflation measure—spanning both services and manufacturing—showed accelerating price pressures rather than the cooling policymakers had anticipated through the summer.

Barr's remarks mark a notable shift in Fed communication. The central bank has maintained rates at a 22-year high following its July increase, with officials previously signaling a willingness to pause. The combination of hawkish commentary from a senior Fed official and deteriorating inflation data now forces traders to reprice October meeting expectations.

The timing matters: October represents the Fed's penultimate policy meeting of 2023, and additional tightening would push borrowing costs into uncharted territory for this cycle. Rate-sensitive sectors face renewed pressure as the yield curve adjusts to a potentially longer hiking campaign.