Federal Reserve Chair Warsh's Friday address at the Jackson Hole symposium has reignited market wagers on imminent interest rate hikes. While stopping short of issuing explicit guidance for the September meeting, Warsh made it clear that policymakers must be convinced underlying inflation is moving "clearly and sufficiently quickly" toward the 2% target, adding that otherwise, the Fed "still has work to do."

This rhetoric prompted an immediate repricing in rate markets. Media reports indicate that traders have resumed positioning for a single 25-basis-point hike within the year and are leaning toward two increases by March 2027. CME data showed the probability of a September hike climbing from roughly 35% before the speech to 50%, with other market indicators briefly suggesting it reached as high as 55%. Subsequent reports noted that market data at one point put the figure near 60%.

Additionally, prediction market Polymarket saw the odds of a September Fed hike surge past the 50% threshold.

The renewed appetite for rate-hike bets stems not from an explicit "September hike" announcement by Warsh, but from his first systematic articulation of his policy reaction function as Fed Chair: the 2% inflation target is a "firm and fixed" objective; recent inflation data does not yet prove a meaningful improvement in the underlying trend; and U.S. financial conditions are not tight. Within this framework, if inflation persists above target, raising rates naturally returns to the table as a viable option.

"Still work to do" fuels September rate-hike bets

The most closely scrutinized portion of Warsh's speech was the following statement: "We must be confident that underlying inflation is moving in the direction of our target, clearly and sufficiently quickly. Otherwise, we still have work to do."

Warsh did not explicitly define "still have work to do" as a need for rate increases, but markets clearly interpreted it as preserving the possibility of further policy tightening.

Bloomberg data showed that implied yields on SOFR futures rose by as much as roughly 6.5 basis points compared to pre-speech levels. Traders have once again priced in one 25-basis-point hike this year and are increasingly leaning toward two hikes by March 2027.

The shift in September meeting probabilities was the most pronounced. After Warsh's comments, market pricing for a September hike rose significantly, with the probability climbing from about 35% before the speech to roughly 50%, intraday peaks near 55%, and one market data snapshot even hitting approximately 60%. This marks a rapid pivot from "well-below-even odds" to at least a coin flip for the September 16 meeting.

Meanwhile, another set of intraday market data showed the September hike probability spiking to 55.7%. Although quotes varied by timestamp, they all pointed in the same direction: Warsh's commentary notably elevated market expectations for a September move.

Markets also price two hikes by March 2027

The market shift was not confined to the September session. Bloomberg data indicated that traders have not only resumed pricing a single 25-basis-point hike within the year, but have also begun favoring the possibility of two increases by March 2027.

In other words, Warsh's speech altered not just expectations for the upcoming meeting, but also reshaped market views on the trajectory of several future FOMC sessions.

This shift is closely tied to Warsh's assessment of the economy. He characterized the U.S. economy as still displaying considerable resilience: robust corporate capital expenditure growth, corporate profits up roughly 20%, consumption growth near 3%, an unemployment rate of approximately 4.1%, and low initial jobless claims.

He went on to state: "I find it difficult to characterize the overall financial environment as restrictive."

If the economy shows no significant deceleration and financial conditions remain accommodative, then with inflation still above target, markets naturally assume the Fed retains room to push rates higher.

Warsh offers no "September hike" promise, emphasizes "discipline" over specific decisions

It is important to note, however, that the renewed rate-hike pricing does not mean Warsh has committed to tightening in September. On the contrary, a hallmark of this speech was his opposition to conventional forward guidance.

He remarked: "A quieter Fed, with more targeted communication, is better positioned to achieve its objectives."

Warsh argued the Fed should not encourage excessive market reliance on its descriptions of future policy paths, nor should it publish a mechanical policy reaction function.

Concluding his remarks, he said he is "committed to following a discipline, not (pre-committing) to a decision."

This implies Warsh is effectively telling markets: he can articulate policy principles, but he will not telegraph in advance whether the next meeting will bring a hike or a hold.

Consequently, whether the September session ultimately delivers a hike still hinges on the inflation and employment data published in the coming weeks.

Upcoming data will be pivotal for the September meeting

Warsh's address gave markets a clearer policy "discipline" without offering a definitive policy "answer."

The key variable markets now face: will upcoming inflation figures show underlying inflation trending "clearly and sufficiently quickly" toward the 2% target, as Warsh outlined? If data continues to exhibit sticky inflation, the speech has already carved out ample room for further hikes. Conversely, if inflation cools meaningfully, September rate-hike bets could unwind just as quickly.

Thus, the most significant impact of this Jackson Hole speech is not that Warsh "announced" a September hike, but that he reinserted rate increases into the market's baseline scenario discussion. As of now, the probability of a September hike has jumped from roughly 35% before the speech to near 50% or higher, with markets beginning to price two potential hikes in the coming months. In essence, Warsh has not laid out a clear rate path, yet he has successfully compelled markets to once again price in "higher for longer."