Quick Answer
As reviewed on November 9, Opinion marked the Democratic Party as
Won in both its 2026 House-control and Senate-control markets, and marked Democrats Sweep as Won in the balance-of-power market. These are Opinion market determinations under the contracts’ rules—not official election certifications. On the 2026 Midterms hub, a percentage is a current market-implied probability or lead, while Won indicates a determined market outcome.Use the market page to study probabilities and settlement. Use the relevant state election authority and official federal election resources to verify the public election result.Data Status
Reviewed November 9, 2026. The Opinion Midterms hub showed its House, Senate and balance-of-power control cards as determined, while several individual state and district markets still displayed percentages or settlement status. The hub publishes its own data-update timestamp. Statuses can change after this article is published, so the live hub and each market’s written rules take priority.The FEC states that 2026 results are not immediately available from the commission and that state election offices certify results. At this review date, use state authorities—not an Opinion market label—as the source for official public results.
- Chamber control: which party controls the House or Senate.
- Balance of power: combinations of House and Senate control.
- Individual races: selected Senate, House and governor contests.
Probability, Result and Certification Are Different
Always read the market title and rules. “Which party will control the Senate?” is not the same contract as “Who will win the Alaska Senate race?” and neither is interchangeable with a candidate’s vote share.
How to Read the Opinion Midterms Hub
1. Check the timestamp
Election pages can mix determined markets with races still awaiting a final source. Start with the page’s Data updated timestamp before quoting a probability or result.2. Separate a percentage from “Won”
A percentage is a market signal that may continue to move. Won is a result state. Do not write that a candidate “won” merely because a contract trades at 95% or 97%.3. Open the individual market rules
The hub is an overview. The individual market page controls the exact question, source, deadline, treatment of recounts or corrections, and dispute process.4. Check volume and the order book
Volume shows trading activity, not forecast quality. A probability from a thin order book can be less informative than the same headline percentage in a deeper market. Review spread and available depth before treating the displayed price as executable.5. Verify the public result independently
For public election reporting, follow the relevant state election office. The Federal Election Commission maintains links to election and voting resources, but election administration and certification are handled through the applicable authorities.How to Evaluate Whether a Market Was Accurate
An outcome alone does not prove that a market was well calibrated. To evaluate a 2026 midterm market, record:
For a binary market, one simple calibration measure is the Brier score:
(0.70 − 1)² = 0.09. Lower scores are better, but one market is not enough to judge a forecasting system. A useful review needs many timestamped forecasts under consistent rules.
Why Results Can Remain in Progress
Election markets can stay unresolved after Election Day because:- the designated source has not published a sufficiently final result;
- a race remains too close to call;
- provisional, mail or overseas ballots are still being processed;
- a recount or correction is relevant under the market rules;
- the market’s dispute window is still open.
Where to Continue
- Open the live 2026 Midterms hub for the latest market status.
- Read How Opinion AI Resolves Prediction Markets for the oracle model.
- Review Opinion Market Resolution and Disputes before interpreting Won or a pending result.
- Use Order Books, Spread and Liquidity to evaluate whether a displayed percentage was tradable at your intended size.
- See Opinion Market Signals for a reusable probability-recording framework.
FAQ
What did Opinion's 2026 House and Senate control markets resolve to?
What did Opinion's 2026 House and Senate control markets resolve to?
As of this page’s November 9 review, Opinion marked the Democratic Party as Won in both its 2026 House-control and Senate-control markets. Those are Opinion market determinations, not official election certifications; state election authorities remain the source for certified public results.
Are 2026 midterm odds the same as election results?
Are 2026 midterm odds the same as election results?
No. Odds or contract prices are market estimates. A determined market result applies the contract’s resolution rules. An official result comes from the responsible election authority.
Why does a race still show 97% instead of Won?
Why does a race still show 97% instead of Won?
A high probability can still be a live market price. The designated source, market close, resolution review or dispute process may not yet be complete.
Can I compare prediction-market probabilities with polls?
Can I compare prediction-market probabilities with polls?
Yes, but align the timestamp, exact question and outcome definition. Polls estimate voter preferences from samples; prediction-market prices reflect trades, liquidity and participant incentives. They are different signals.
Does high volume prove an election market is accurate?
Does high volume prove an election market is accurate?
No. Volume measures trading activity. Accuracy also depends on timing, calibration, market rules, liquidity and the quality of information incorporated into prices.
Sources
- OPINION — US Midterms 2026 — current market statuses, update timestamp and market links
- Federal Election Commission — Election and Voting Information — official election-resource directory
- OPINION Docs — Resolution — current resolution overview
- OPINION Docs — Dispute — current dispute process