PolymarketAI / TechDevelopingUpdated 2h ago

Will CMI declare a Millennium Prize Problem solved by December 31, 2026?

As of Oct 24, 2026, 11:21 AM ET, Polymarket priced this market at 3.4% (little changed over 24 hours). It had $12.3K of order-book liquidity and a bid-ask spread of 0.6 pts.

Market probability
3.4%
Little changed over 24 hours
Limited dataNot live — snapshot Oct 24, 11:21 AM ET

The venue's feed doesn't report liquidity for this market, with broad trading across many accounts.

Price historyPolymarket

Source: Polymarket price history

How credible was the move?

Methodology →

Move validity

Insufficient data

Consensus stability

Stable

Contract clarity

High

Can you trust this price?

Two different questions: how hard the price is to move, and whose trading set it.

Market capacity

How hard is it to move this price?

UnknownTight spreadThin market

Order-book liquidity

$12.3K

Bid-ask spread

0.6 pts

24h volume

$0

Total volume

$289.3K

It would take roughly $493.4 of buying to move the price up by ~5 pts.

The venue's feed omits liquidity, so the score treats depth as unknown — the live order book above is the best read of how hard this price is to move.

Who's trading

Whose opinion is this price?

Broad participation
17%of the traded money came from the single largest account

Accounts

104

Trades

200

over 42 days

Largest order

$245.9

$1.9K traded across these 200 trades (last 42 days).

Many independent accounts traded — the price reflects a crowd, not one trader.

Recent trade activity$1.9K traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

This market will resolve to "Yes" if the Clay Mathematics Institute (CMI) awards a Millennium Prize for any of the six remaining unsolved Millennium Prize Problems, or otherwise officially declares any of these problems solved on its website or in an official communication, by 11:59 PM ET on the date specified in the title. Otherwise, this market will resolve to "No".

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

This market will resolve to "Yes" if the Clay Mathematics Institute (CMI) awards a Millennium Prize for any of the six remaining unsolved Millennium Prize Problems, or otherwise officially declares any of these problems solved on its website or in an official communication, by 11:59 PM ET on the date specified in the title. Otherwise, this market will resolve to "No". This market will resolve solely based on a qualifying declaration by CMI that one of the six remaining unsolved Millennium Prize Problems has been solved, regardless of whether the solution takes the form of a positive proof, counterexample, disproof, or any other resolution accepted by CMI. A Millennium Prize award will qualify as an official declaration, but is not required; an official CMI statement that a problem has been solved is sufficient on its own. Whether the solution was produced in whole or in part by artificial intelligence, and whether any recipient accepts or declines a prize, will not be considered. A published or publicly posted proof will not qualify on its own, regardless of its acceptance by the mathematical community. The primary resolution source will be official information from the Clay Mathematics Institute (e.g., https://www.claymath.org); however, a consensus of credible reporting may be used to confirm that a qualifying CMI declaration or award has occurred.

Resolution source: claymath.org

What could move this market next?

  • The market's deadline arrivesDecember 31, 2026 at 11:59 PM ET

    The contract must resolve based on what has happened by this date.

  • Confirmation at the resolution source (claymath.org)

    The rules name this source as the basis for settlement.

Derived from the contract's own mechanics as of Oct 24, 1:09 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: low · expected error ±19 pts.

Thin marketLegacy movement classifier: watch

What's happening

low classifier confidence
Thin market

Thin book and/or wide spread. Small orders can move this price disproportionately, so any single print is noisy and easily overread.

  • Thin book and/or wide spread.

Read with caution —Read the latest price with caution; conditions make it an unreliable summary right now.

More details — reliability score, dynamics, durability
Reliability score
18Low
Where the price path tends to go next1583 observed
  • Choppy / mean-reverting98%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life —
PredictabilityStable

Secondary read: leaning toward Stale price.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Change (pts)1H0.06H0.024H0.07D0.0

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