The market only gives a 17% probability, but economists claim it's "fifty-fifty": Is the suspense over a Federal Reserve rate hike in October being seriously underestimated?

The futures market is almost dismissive of a potential Federal Reserve rate hike in October, but the community of economists is sending a starkly different warning signal.

The futures market currently assigns only a 17% probability to a Fed rate hike in October, betting the central bank will stay on hold. However, according to a recent MarketWatch report, multiple economists believe the FOMC meeting on October 27-28 holds far more suspense than market pricing suggests. Former Bank of America Securities chief economist Ethan Harris bluntly called it a “50-50" judgment; Oxford Economics U.S. economist Matthew Martin was more explicit, directly predicting consecutive rate hikes in October and December. These two completely opposite assessments reflect the high level of uncertainty surrounding the current monetary policy path.

The main driver prompting economists to raise rate hike expectations is the much higher-than-expected inflation data. An article from Wall Street Insights noted that U.S. inflation data for September showed consumer prices up 3.7% year-on-year, while the Producer Price Index's wholesale inflation rate surged to 6.3%. Prices for goods excluding energy accelerated notably—a detail particularly alarming since these prices tend to be less volatile, and their strength indicates stickier inflation pressures. Meanwhile, Fed Chair Warsh (Kevin Warsh) deliberately maintained a neutral stance during the IMF/World Bank annual meetings, refusing to comment on the outcome of the FOMC, leaving markets without clear forward guidance.

If the October meeting is as “undecided” as some economists suggest, an unexpected rate hike could trigger a substantial impact on U.S. Treasury yields, the U.S. dollar, and risk assets—resonating through market expectations for December and even longer-term policy trajectories.

Data Turning Point: September Inflation Breaks the “No Rush to Act” Consensus

Before the latest inflation data was released, Fed officials generally signaled "no rush to raise rates," which shaped the market’s base case for a pause in October.

However, the publication of September’s inflation data changed this picture. The year-on-year rise in the Consumer Price Index reached 3.7%, and the Producer Price Index's wholesale inflation rate rose further to 6.3%. According to MarketWatch, Oxford Economics’ Martin pointed out, the real concern isn’t the headline data, but the acceleration in prices for goods excluding energy—because these goods tend to have low price volatility, ongoing strength here signals a structural inflation pressure rather than just a short-term disturbance.

Carl Weinberg, chief economist at High Frequency Economics, said he believes the latest inflation data will persuade enough Fed policymakers to support consecutive hikes in October and December.

The Fed already completed its first rate hike in three years in September, adjusting the rate range to 3.75%-4%. Former Philadelphia Fed President Patrick Harker indicated that the current rate level seems not to have exerted substantial downward pressure on the economy yet, meaning tightening may still be insufficient. He believes that moving quickly with 25 basis point hikes in both October and December before pausing to assess would not only suppress inflation, but also reinforce the Fed’s credibility as an inflation fighter.

A Politically Sensitive Window: Would the Fed Risk a Rate Hike Six Days Before the Election?

Those supporting a pause in October are motivated not just by policy pacing considerations—there’s also an unavoidable reality: the October 28 FOMC decision falls just six days ahead of the November 3 midterm elections.

Some economists believe the Fed is reluctant to act so close to the election to avoid perceptions of political motivation—any action or inaction could spark political criticism.

However, Ethan Harris is skeptical of this concern. He says the midterm election is merely a “small factor” for the Fed. “Whatever the Fed does, someone will criticize them. The President (Trump) will rip them either way.” This view implies that political pressure alone isn't a sufficient reason for the Fed to deviate from a data-driven decision-making framework.

On the communication strategy front, Fed Chair Warsh deliberately remained vague in his final public remarks before the blackout period. Speaking at the Bangkok IMF/World Bank annual meeting, he said, “I don’t think it’s appropriate to prejudge any actions I might take at the remaining meetings this year.” This deliberately neutral comment neither paves the way for an October rate hike nor rules out the possibility—objectively making it harder for markets to interpret policy direction.

Two Policy Paths: Fast vs. Gradual, Each with Its Costs

Confronted with inflation data and the tension with policy timing, the Fed faces two clear policy paths.

Path One: Consecutive rate hikes in October and December. Supporters argue that this approach would push rates rapidly to restrictive levels while signaling the Fed’s high vigilance against inflation. Lindsey Piegza, chief economist at Stifel Financial, notes that a rate increase in October would send a "deep concern about inflation" message, prompting markets to push rates higher on their own and further dampen economic demand.

Path Two: Skip October, with hikes in December and next March. Supporters say a pause gives the Fed more time to assess data and gauge whether tightening measures are sufficient. Aditya Bhave, Head of U.S. Economics at BofA Global Research, wrote in a client note that a pause allows the Fed more time to watch the data and adjust the terminal rate accordingly; but the downside is that with the U.S. economy still strong, the Fed may face the risk of “falling behind the curve.”

Piegza also warns that if the Fed opts for the more patient path, the public may start to doubt whether high inflation will persist over the longer term, thus weakening the Fed’s ability to manage inflation expectations.

If October Sees a Surprise Hike: Market Impact Can't Be Underestimated

With rate hike odds priced at 17%, if the Fed actually hikes in October, the market will face significant repricing pressures.

For U.S. Treasuries, a surprise hike would directly push up short-end yields and could drive long-term rates higher, increasing yield curve volatility. For the U.S. dollar, repricing of rate expectations usually supports the dollar, potentially leading to a stronger Dollar Index in the short term. For risk assets, stock and credit markets will come under pressure, especially growth stocks and high-yield bonds that are sensitive to rates.

More profound is the effect on future policy expectations. If October sees a rate hike, markets will be forced to reassess the pace of hikes in December and even into next year—the previously mild expectation of "one hike per quarter" will face fundamental revision, and terminal rate forecasts will be raised accordingly.

As Harris puts it, the Fed committee overall leans dovish and may be reluctant to move quickly with back-to-back hikes—but persistently above-expectation inflation is narrowing the room for hesitation. Markets pricing a 17% probability for an October hike may be underestimating the true intensity of this policy gambit.