Almost everyone now agrees on the direction of the Fed's next move. The harder question is size. Polymarket's December Fed decision market prices a 25 basis point hike at about 91.5%. A move of 50 points or more sits at about 4.7%. A hold sits at about 2.9%. When direction is settled, the live trade is the size of the step. That middle case, the expected 25 points, is exactly where a Maybe outcome earns its place.
Where the Fed stands going into December
Start with the facts on the record. The Federal Open Market Committee raised its target range by a quarter point on 16 September 2026. It was the first increase since 2023. At its 27–28 October meeting, the Committee held the range at 3.75% to 4.00%.
The hold was not unanimous. According to the Federal Reserve's October statement, Governor Lisa D. Cook and Cleveland Fed President Beth M. Hammack dissented. Both preferred a quarter-point hike at that meeting. The vote was 10–2.
The next meeting runs on 8–9 December. It is the last of the year. The Fed's calendar marks it as a meeting with a Summary of Economic Projections.
Since October, the data has pushed one way. Reuters reported that October's consumer price index marked a third straight month of upside surprises. A Reuters poll of 101 economists, taken 6–10 November, found every respondent expecting a 25 point hike in December. That would lift the range to 4.00%–4.25%. Governor Christopher Waller said he would support at least a quarter-point increase. He added that, in some scenarios, a 50 point move should be considered.
So direction is close to consensus. Size is not.
The Yes/No/Maybe mechanic, briefly
On Oddup, every market has three outcomes. Yes and No cover the two clear results. Maybe covers a defined middle band, written into the rules before trading opens. Each outcome trades as a price between 0 and 1. That price reads as the crowd's probability for the outcome.
The payout mechanics are fixed in advance. Yes and No split 90% of the pool. Maybe wins 10% of the pool reserve. The point is not to dodge a view. It is to price the result that sits between the two loud ones.
Rate decisions suit this structure well. Fed moves come in steps. There is a clear "less than expected", a clear "more than expected", and a well-defined middle. A three-outcome market maps onto that shape directly.
How the bracket ladder is built
Polymarket lists the December decision as a single event with five brackets. Each bracket is its own Yes/No market. Here is the ladder from our snapshot on 13 November, about 22:40 IST.
- 50+ bps decrease: about 0.25%
- 25 bps decrease: about 0.35%
- No change: about 2.9%
- 25 bps increase: about 91.5% (best bid 0.91, best ask 0.92)
- 50+ bps increase: about 4.7% (best bid 0.046, best ask 0.048)
The five prices add up to about 99.7%. That is close to 100%, which is what you expect from mutually exclusive brackets. Small gaps come from spreads and from prices moving between trades. A sum far from 100% would be a warning sign worth investigating.
The event has traded about $31.9 million in total. About $4.1 million of that changed hands in the past 24 hours. Open interest sits near $5.2 million. Listed liquidity is about $1.7 million across the event.
Those numbers tell you the market is active and deep enough to read. They do not tell you the answer. They tell you how much money currently agrees with each bracket.
Read the rule before the ladder
Every bracket depends on one definition. The Polymarket market rules measure the change in the upper bound of the target range. They compare it with the level before the December meeting. Today that upper bound is 4.00%.
Two details matter more than they first appear.
- Rounding. If the Fed moves by an amount not listed, the change is rounded up to the nearest 25 points. A 12.5 point move would count as 25.
- Source. Resolution comes from the FOMC statement after the 8–9 December meeting. Commentary, leaks and press-conference tone do not settle it.
Neither detail is likely to bite this time. But the habit matters. A market only means what its rule says. Read the rule first, then read the price.
Collapse the brackets into your question
Five brackets are useful for precision. They are less useful for decisions. Most traders hold a simpler view, such as "will the Fed surprise hawkish?" The trick is to collapse the ladder into that question.
Here is one clean way to do it for December.
- No surprise to the upside, or a dovish one: no change plus any cut. That is about 2.9% + 0.35% + 0.25%, or roughly 3.5%.
- The expected step: exactly 25 points up. About 91.5%.
- A hawkish surprise: 50 points or more up. About 4.7%.
Now the shape is obvious. The market sees the middle case as the base case. It sees a hawkish surprise as slightly more likely than a hold. Both tails together sit just above 8%.
Worked example: an Oddup-style December market
Let's turn that collapsed ladder into a three-outcome question. This is an illustrative market, not a live Oddup listing.
Question: Will the FOMC raise the upper bound of the federal funds target range by more than 25 basis points at its 8–9 December 2026 meeting?
- Yes: the upper bound rises by 50 points or more.
- Maybe: the upper bound rises by exactly 25 points.
- No: the upper bound is unchanged or lower.
Resolution source: the FOMC statement released after the meeting. Clock: resolves on the statement, not on market reaction.
Using the Polymarket snapshot as a reference, the implied prices would sit near these levels.
- Yes (50+ up): about 0.047
- Maybe (exactly 25 up): about 0.915
- No (hold or cut): about 0.035
Read it like this. A trader who thinks inflation forces a bigger step would look at Yes. At under 5 cents, the market is saying that view is a long shot. A trader who expects a surprise pause would look at No. At about 3.5 cents, that view is a long shot too.
The Maybe leg carries the consensus. Buying it at about 0.915 is a bet that nothing unusual happens. The upside is small. The risk is a surprise in either direction. That is the honest trade-off, and the three-outcome format makes it visible on one screen.
Compare that with a binary "will the Fed hike in December?" market. It would trade near 96%. The 25 and 50 point outcomes would sit together on the same side. The one question traders are now arguing about would disappear inside a single Yes.
Check the second source, and the clock
Polymarket is not the only place pricing December. Futures that settle to the Fed's policy rate do the same job. After October's CPI release on Tuesday, Investing.com reported CME FedWatch pricing about 88.8% for a 25 point hike. It priced about 11.2% for a 50 point move.
Set that beside our snapshot. Polymarket shows about 4.7% for 50 points or more. CME showed about 11.2%. That gap looks large. It is not automatically a mispricing.
- Different times. The CME figure was reported after Tuesday's data. Our snapshot was taken on Friday evening, India time. Prices move between those points.
- Different instruments. FedWatch derives probabilities from futures prices, using its own method. Polymarket prices come from traders on each bracket.
- Different rules. Each venue defines and settles its outcome its own way. A small wording difference can shift a tail.
The useful habit is simple. Compare sources at the same timestamp, on the same definition. If a gap survives that check, it is information. If it does not, it was noise from the clock.
What could move the ladder before 9 December
The ladder will not sit still for a month. Three things are worth watching, because each one feeds the size question directly.
- Fed speakers. Waller has already put 50 points on the table. Further officials leaning that way would lift the Yes leg. Officials stressing patience would lift Maybe.
- November data. November CPI is due on 10 December, after the meeting. Any data that lands before the meeting matters more. Strong prints feed the hawkish tail.
- Financial conditions. Reuters reported Citi's view that a 50 point risk depends partly on market volatility stabilising. A sharp sell-off could pull the tail back in.
None of these tells you which bracket wins. Each one tells you which bracket should react first. That is a better use of news than guessing the outcome.
Read the depth on each leg
One more check before trusting any bracket price. Liquidity is not spread evenly across the ladder. In our snapshot, the 25 point increase bracket listed about $474,000 of liquidity, with a one-cent spread. The 50+ point bracket listed about $294,000, with a spread of 0.2 cents.
Both are deep enough to read. But a tail price can still move further on a single large order than the base case can. When a tail jumps, check whether the book moved or one trade did. A price backed by depth carries more weight than a price set by one fill.
Why this matters for prediction traders
When a central bank decision is near consensus, the headline market goes quiet. The real disagreement moves into the size of the step. Binary markets bury that disagreement. A bracket ladder exposes it. A three-outcome market puts it on a single screen.
Here's what the data shows. The market expects a 25 point hike with high confidence. It prices a bigger move at under 5%, and a hold at about 3%. The interesting trade is not whether the Fed hikes. It is whether the Fed does more than the consensus expects.
In practice, the method carries over to any rate decision. Read the rule. Collapse the brackets into your question. Check the depth on each leg. Compare sources at the same timestamp. Then decide which outcome your view actually supports.
This article is for educational and informational purposes only. It is not financial, investment, legal or tax advice, and it does not recommend any trade. Market figures are a snapshot from Polymarket's public data at the stated time and will have changed since. Third-party figures are as reported by the linked sources. The Oddup December Fed market is illustrative and not a live market. Prediction markets involve risk, including loss of funds. Availability and eligibility vary by jurisdiction. Oddup does not make predictions or guarantee outcomes.
