KalshiMacro / FedDevelopingUpdated 10m ago

Will CPI rise more than 0.4% in December 2026?

As of Oct 18, 2026, 3:40 PM ET, Kalshi priced this market at 19.5% (little changed over 24 hours). It had $84.8 traded in the past 24 hours, $1.4K of order-book liquidity and a bid-ask spread of 1.0 pts. probcast.co rates the support behind this price as moderate.

Market probability
19.5%
Little changed over 24 hours

Thin market where small orders can move the price; the price has held steady over 24 hours.

Price historyKalshi

Source: Kalshi price history

How credible was the move?

Methodology →

Move validity

Moderate

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?

ThinTight spread

Order-book liquidity

$1.4K

Bid-ask spread

1.0 pts

24h volume

$84.8

cash traded · $270 notional on Kalshi

Open interest

$1K

It would take roughly $109 of buying to move the price up by ~5 pts.

Little money on the book — a modest order can move this price, so treat swings with care.

Who's trading

Whose opinion is this price?

Participation data isn't captured for this market yet.

Participation data isn't captured for this market yet, so we can't say how many accounts set this price.

What this market actually measures

If the Consumer Price Index (CPI) increases by more than 0.4% in December 2026, as reported to one decimal place, then the market resolves to Yes.

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

If the Consumer Price Index (CPI) increases by more than 0.4% in December 2026, as reported to one decimal place, then the market resolves to Yes.

Resolution source: If the Consumer Price Index (CPI) increases by more than 0.4% in December 2026, as reporte…

What could move this market next?

  • The market's deadline arrivesJanuary 13, 2027 at 8:29 AM ET

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

Derived from the contract's own mechanics as of Oct 18, 3:50 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 ±17 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
19Low
Where the price path tends to go next610 observed
  • Illiquid / quiet99%

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

DurabilityHigh· half-life ~4w
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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