U.S. September Consumer Price Index (CPI) broadly exceeded expectations, rising 3.7% year-over-year and 0.6% month-over-month. Core CPI, excluding food and energy, increased 2.6% year-over-year and 0.3% month-over-month, both higher than economists' forecasts. Following the report's release, market bets on a Federal Reserve rate hike in October briefly surged to approximately 50%, U.S. Treasury yields rose, and U.S. equities faced pressure.

Nick Timiraos, often referred to as the "new Fed mouthpiece," noted that the stronger-than-expected performance of core CPI in September was more widespread, indicating that inflationary pressures are no longer just a short-term shock from rising energy prices. This elevates the importance of Federal Reserve Chairman Warsh's public remarks on Thursday evening U.S. Eastern Time.