Fed Hikes IORB to 3.90% in First Increase Since 2023
The Board of Governors voted unanimously on September 16, 2026, to raise the interest rate paid on reserve balances to 3.90 percent. Federal Reserve
The vote implemented a 25-basis-point tightening at the close of the September 15-16 FOMC meeting. The meeting had been listed on the Federal Reserve calendar with a Statement. Prior to the decision, the target range stood at 3-1/2 to 3-3/4 percent, where the Committee had left it on July 29, 2026. Federal Reserve
Positioning left little room for surprise. Minutes of the July meeting, published August 19, noted that markets were fully pricing in a 25-basis-point hike by the September meeting. Federal Reserve By September 14, futures pricing implied about a 90% probability of a quarter-point move, up from about 70% before the latest inflation data. Reuters Economists surveyed ahead of the meeting expected a quarter-point increase to 3.75%-4.00%. Reuters
That outcome ended a long pause. The September increase was the first increase since July 2023. Reuters It was also the first under Warsh. Reuters The decision to tighten came after President Trump had demanded a rate cut ahead of the September 16 decision. BNN Bloomberg
Market reaction was orderly. Gold pared its advance after the quarter-point increase. The forward signal pointed to further restriction. After the September 16 increase, the Federal Reserve penciled in an additional interest-rate hike. Bloomberg
The broader context here is one of calibration rather than regime change. A unanimous Board vote on IORB alongside a fully priced FOMC move keeps administered rates, overnight repo and the effective funds rate in alignment. No dispersion. No dissent to parse. For reserve management, the 3.90 percent IORB setting preserves the spread over the bottom of the target range and sustains the incentive to hold reserves at the Fed rather than release them into money markets.
Looking at what this means for the path, the sequencing matters more than the single move. A first hike after more than three years, coupled with guidance for another, shifts the distribution of terminal-rate expectations without forcing a repricing of the September decision itself. That structure explains why pre-meeting odds could migrate from 70% to 90% on incoming inflation data while the minutes could already describe a full pricing. The market was not debating lift-off mechanics. It was underwriting persistence. In my view, the risk for desks now sits less in the level of the funds rate than in duration and the pace of any follow-on move, with term funding, deposit betas and reserve demand as the transmission points to watch.
