As of Oct 29, 2026, 9:17 AM ET, Polymarket priced this market at 27.5% (up from 26.5% 24 hours earlier). It had $258.6K traded in the past 24 hours, $4.8M of order-book liquidity and a bid-ask spread of 1.0 pts. probcast.co rates the support behind this price as strong.
Deep, easy-to-trade market, traded by a small group of accounts.
Source: Polymarket price history
Is the move backed by real trading and depth?
The pricing is supported by healthy trading volume and market depth, a tight spread.
Has the market settled at the new probability?
The probability has held near its current level over the past several hours.
Will the rules resolve without ambiguity?
The resolution rules are relatively specific, with a named source and a defined deadline.
Two different questions: how hard the price is to move, and whose trading set it.
How hard is it to move this price?
Order-book liquidity
$4.8M
Bid-ask spread
1.0 pts
24h volume
$258.6K
Total volume
$5.7M
It would take roughly $1.5M 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.
Whose opinion is this price?
Accounts
76
Trades
200
over 22h
Largest order
$8.4K
$69.1K traded across these 200 trades (last 22h).
A small group of accounts did most of the trading — neither one whale nor a broad crowd.
From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.
This market will resolve according to the party that wins control of the United States Senate and the party that wins control of the United States House of Representatives in the 2026 United States midterm election. A party wins control of the United States Senate if it wins a majority of the chamber’s voting seats.
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.
This market will resolve according to the party that wins control of the United States Senate and the party that wins control of the United States House of Representatives in the 2026 United States midterm election. A party wins control of the United States Senate if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting seats, the party that wins control of the chamber is the party that wins half of the voting seats and holds the Vice Presidency. If the outcome remains ambiguous after applying the above criteria, the chamber will be deemed controlled by the party with which the first selected President Pro Tempore of the Congress that convenes after the specified election is affiliated. A party wins control of the United States House of Representatives if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting seats, the chamber will be deemed controlled by the party with which the first elected Speaker of the House of the Congress that convenes after the 2026 midterm election is affiliated. The following rules govern the counting of seats for determining which party wins control of the chambers. For determining Senate control, all regular and special Senate elections that determine representation in the upcoming 120th Congress and are scheduled to take place in November 2026 as of October 31, 2026 are included. Vacant Senate seats for which no election or special election to fill the seat is scheduled to take place in November 2026 as of October 31, 2026 will be treated as held by the party affiliation of the most recent member to hold that seat. For determining House control, all House elections in the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th Congress are included. Where a Senate or House seat is decided by a runoff, the runoff result will determine attribution of that seat, even if it takes place after November 2026. For seats contested in the specified election, seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation, or vacates their seat, between election day and the formal organization of Congress, the seat is attributed to the party under which the member was elected. For seats not contested in the specified election, seats are attributed to the party that holds the seat as of the date of the election. If a current sitting member of the U.S. Senate who is not up for election changes party affiliation or vacates their seat after the date of the election, the seat is attributed to the party under which the member was affiliated at the time of the election. Senate and House members elected as independents who formally caucus with, or, for newly elected members, who announce their intent to caucus with, a party are included in that party’s count. If the caucus decisions of members of the Senate or House elected as independents cannot be determined on the date of the election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party. The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.
The contract must resolve based on what has happened by this date.
Derived from the contract's own mechanics as of Oct 29, 9:23 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.
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 ±9 pts.
A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.
The latest price is a dependable read of consensus.
Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.
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.