PolymarketPoliticsDevelopingUpdated 5m ago

Next White House Press Secretary announced by October 31, 2026?

As of Oct 17, 2026, 12:08 PM ET, Polymarket priced this market at 18.5% (down from 19.5% 24 hours earlier). It had $168.6K traded in the past 24 hours, $39K of order-book liquidity and a bid-ask spread of 1.0 pts. probcast.co rates the support behind this price as strong.

Market probability
18.5%
−1 percentage point
over 24 hours19.5% → 18.5%

Deep, easy-to-trade market, traded by a small group of accounts.

Price historyPolymarket

Source: Polymarket price history

How credible was the move?

Methodology →

Move validity

Strong

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?

DeepTight spread

Order-book liquidity

$39K

Bid-ask spread

1.0 pts

24h volume

$168.6K

Total volume

$0

It would take roughly $4.8K of buying to move the price up by ~5 pts.

Lots of money on the book and a tight spread — a single ordinary order can't move this price much.

Who's trading

Whose opinion is this price?

A few accounts
40%of the traded money came from the single largest account

Accounts

97

Trades

169

over 21h

Largest order

$7.3K

$31.7K traded across these 169 trades (last 21h).

A small group of accounts did most of the trading — neither one whale nor a broad crowd.

Recent trade activity$31.7K 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 Donald Trump or the Trump administration announces a new White House Press Secretary to replace Katie Zacharia between market creation and the specified date, 11:59 PM ET. 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 Donald Trump or the Trump administration announces a new White House Press Secretary to replace Katie Zacharia between market creation and the specified date, 11:59 PM ET. Otherwise, this market will resolve to "No". An individual announced as an acting or interim Press Secretary will not qualify toward this market's resolution. Any qualifying announcement made within this market's time frame will count, regardless of when the new Press Secretary is sworn in or begins serving. This market's primary resolution source will be official information from the Trump administration; however, a consensus of credible reporting may also be used.

What could move this market next?

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

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

Derived from the contract's own mechanics as of Oct 17, 12:14 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Probability by deadline

The same event, priced across deadline contracts on this venue.

Extending the deadline from Oct 31 to Dec 31 adds about 64.0 percentage points of implied probability.

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: high · expected error ±12 pts.

Quote-drivenLegacy movement classifier: watch

What's happening

medium classifier confidence
Quote-driven

A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.

  • Tight spread on a liquid, calm market

The latest price is a usable but caveated read — weigh it with the market state.

More details — reliability score, dynamics, durability
Reliability score
49Medium
Where the price path tends to go next290 observed
  • Stable consensus96%
  • Choppy / mean-reverting3%

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

DurabilityHigh· half-life <1h
PredictabilityStable

Secondary read: leaning toward Trading normally.

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)1H0.06H-1.024H-1.07D-1.0

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