Fed Hike: Is the Market Too Certain at 93%?
Market probability: 93%
ProbGap forecast: 88%
Gap: −5 percentage points
Resolution: September 16, 2026
Welcome to the first ProbGap forecast.
The market has made up its mind.
Traders now price roughly a 93% probability that the Federal Reserve will raise rates by 25 basis points on Wednesday, which would take the federal funds target range to 3.75%–4.00%.
ProbGap agrees that a hike is the overwhelmingly likely outcome.
We just aren't quite as certain.
The ProbGap view
Our forecast: 88% chance of a 25 bp hike.
That puts us 5 percentage points below the market.
The difference is not large enough to call the market badly mispriced. But after one of the fastest repricings of the year, we think the remaining probability of a hold is slightly larger than current market pricing suggests.
Why the market moved
The shift has been dramatic.
Only days ago, a September hike was far from certain. But hotter inflation readings, resilient economic data and another surge in oil prices have rapidly changed expectations.
Brent crude has moved above $100 per barrel, U.S. 10-year Treasury yields have crossed 5%, and inflation concerns have returned to the center of the Fed debate. Major institutions including Goldman Sachs, JPMorgan, HSBC and Deutsche Bank have moved toward expecting a September hike as well.
A Reuters poll published ahead of the meeting found 85% of economists expecting a 25 bp increase.
The direction of travel is clear.
So why only 88%?
Because 93% implies very little room for surprise.
The Fed is not mechanically tied to market pricing, and the speed of the latest repricing matters.
As recently as September 9, a majority of economists surveyed by Reuters expected the Fed to leave rates unchanged. Within days, inflation data and rising energy prices flipped that consensus.
That new information is significant.
But there is a difference between a hike becoming the most likely outcome and a hike becoming almost certain.
At 93%, the market effectively assigns only a 7% probability to every scenario that could still produce a hold — including concern about overtightening, disagreement within the FOMC, or a preference to wait for more evidence that the latest inflation pressure is persistent.
We think that residual uncertainty is closer to 12%.
Our forecast
25 bp hike: 88%
Hold: 12%
Market: 93% hike
ProbGap: 88% hike
ProbGap: −5 pp
Our conclusion isn't that the market has the direction wrong.
It's that the market may be slightly too certain.
And that distinction is exactly what ProbGap is built to measure.
What is ProbGap?
Prediction markets tell you what the market believes.
ProbGap asks a different question:
What should the probability actually be?
For every market we track, we compare the live market probability with our independent forecast.
Market probability → ProbGap forecast → The Gap
Over time, every forecast will be resolved and added to our public track record.
No hindsight.
No disappearing predictions.
Just probabilities, gaps and results.
Next resolution: September 16, 2026.