TOTAL VOLUME:

$154.3b

24H VOL:

$228,458,490

24H TRANSACTIONS:

2,984,028,936

OPEN INTEREST:

$1,879,276,037

410,833

Markets across

40,345

events

MATCHED EVENTS:

4,363

PLATFORM COVERAGE:

5

Polymarket:

37%

VS.

Kalshi:

63%

BETA

Science and Technology

Senate control favorite on November 2?

polymarket

Senate control favorite on November 2?

Sep 21, 2026, 9:24 PM EST - Nov 2, 2026, 11:00 PM EST

Total volume:

$17,924

Volume 24h:

$280

180%

Liquidity:

$18,022

38%

Open interest:

$12,788N/A

Senate control favorite on November 2?

- Polymarket

Senate control favorite on November 2? - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolves Nov 2, 2026

Time left: 07h:14m:08s

Senate control favorite on November 2?

Amount

$

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Trade on Polymarket

At 99.9¢ buys you 100 shares | Odds: 100% Total Payout: $100 | Net Profit: $0 Multiplier: 1.00x | ROI: 0.1% | APY: N/A

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Markets

Details

Outcome

Trade

Chance %

Price

Spread

Liquidity

Volume

24h

7d

Open Interest

Ends in

Result

polymarket

Senate control favorite on November 2?

100%

1%

Yes 99.9¢

No 0.2¢

0.1¢

$18,022

$17,924

2%

4%

N/A

7h 14m

Active

Total markets: 1

Description

This market will resolve to "Democratic Party" if the Democratic Party's hourly odds value is higher than the Republican Party's hourly odds value in the "Senate Control 2026" listing on PredictionMarketOdds.com for the "Time Window (ET)" ending at 11:00 PM ET on November 2, 2026. This market will resolve to "Republican Party" if the Republican Party's hourly odds value is higher than the Democratic Party's hourly odds value in the "Senate Control 2026" listing on PredictionMarketOdds.com for the "Time Window (ET)" ending at 11:00 PM ET on November 2, 2026. If the Democratic Party's and the Republican Party's hourly odds values are equal for that "Time Window (ET)", this market will resolve 50-50. An hourly odds value is the value in the "Odds of Happening" column that PredictionMarketOdds.com publishes for an option for a one-hour "Time Window (ET)", as shown on the listing page and in the "Odds History" graph. Hourly odds values are compared at the precision published by PredictionMarketOdds.com (one tenth of a percent). If PredictionMarketOdds.com publishes "NO_PRINT" for an option for the specified window, that option's most recent published hourly odds value before the specified window will be used. If PredictionMarketOdds.com has not published anything for the specified window for an option (neither an hourly odds value nor "NO_PRINT"), this market will remain open until a value or "NO_PRINT" for that window is published, and may remain open until November 9, 2026, 11:59 PM ET for that purpose. If nothing has been published for the specified window by that time, that option's most recent published hourly odds value before the specified window will be used. If PredictionMarketOdds.com permanently ceases publishing hourly odds values for the Democratic Party or the Republican Party in the "Senate Control 2026" listing before the specified window, including by removing either option from the listing, this market will resolve based on the hourly odds values published up to that point. If no hourly odds value is published for either of the options between market creation and the end of the specified window, this market will resolve 50-50. If the underlying market is officially decided before the listed date and time, this market will resolve in favor of the listed option which resolves "Yes". If the winning outcome is neither listed option, this market will resolve 50-50. If a published hourly odds value is clearly erroneous as a result of a technical or operational error, this market may remain open for up to an additional 48 hours after that value is first published to allow for a correction. A corrected value will be used in place of the original. If no correction is published within that period, the original value will stand, and revisions published after that period will not be considered. The resolution source for this market is PredictionMarketOdds.com, specifically the hourly odds values for the Democratic Party and the Republican Party in the "Senate Control 2026" listing at https://predictionmarketodds.com/senate-control-2026.html and on each option's detail page, reached by clicking the option's name in the listing. Prices shown on any individual prediction market will not be considered.

Polymarket

This market will resolve to "Democratic Party" if the Democratic Party's hourly odds value is higher than the Republican Party's hourly odds value in the "Senate Control 2026" listing on PredictionMarketOdds.com for the "Time Window (ET)" ending at 11:00 PM ET on November 2, 2026. This market will resolve to "Republican Party" if the Republican Party's hourly odds value is higher than the Democratic Party's hourly odds value in the "Senate Control 2026" listing on PredictionMarketOdds.com for the "Time Window (ET)" ending at 11:00 PM ET on November 2, 2026. If the Democratic Party's and the Republican Party's hourly odds values are equal for that "Time Window (ET)", this market will resolve 50-50. An hourly odds value is the value in the "Odds of Happening" column that PredictionMarketOdds.com publishes for an option for a one-hour "Time Window (ET)", as shown on the listing page and in the "Odds History" graph. Hourly odds values are compared at the precision published by PredictionMarketOdds.com (one tenth of a percent). If PredictionMarketOdds.com publishes "NO_PRINT" for an option for the specified window, that option's most recent published hourly odds value before the specified window will be used. If PredictionMarketOdds.com has not published anything for the specified window for an option (neither an hourly odds value nor "NO_PRINT"), this market will remain open until a value or "NO_PRINT" for that window is published, and may remain open until November 9, 2026, 11:59 PM ET for that purpose. If nothing has been published for the specified window by that time, that option's most recent published hourly odds value before the specified window will be used. If PredictionMarketOdds.com permanently ceases publishing hourly odds values for the Democratic Party or the Republican Party in the "Senate Control 2026" listing before the specified window, including by removing either option from the listing, this market will resolve based on the hourly odds values published up to that point. If no hourly odds value is published for either of the options between market creation and the end of the specified window, this market will resolve 50-50. If the underlying market is officially decided before the listed date and time, this market will resolve in favor of the listed option which resolves "Yes". If the winning outcome is neither listed option, this market will resolve 50-50. If a published hourly odds value is clearly erroneous as a result of a technical or operational error, this market may remain open for up to an additional 48 hours after that value is first published to allow for a correction. A corrected value will be used in place of the original. If no correction is published within that period, the original value will stand, and revisions published after that period will not be considered. The resolution source for this market is PredictionMarketOdds.com, specifically the hourly odds values for the Democratic Party and the Republican Party in the "Senate Control 2026" listing at https://predictionmarketodds.com/senate-control-2026.html and on each option's detail page, reached by clicking the option's name in the listing. Prices shown on any individual prediction market will not be considered.

Frequently asked questions

On Polymarket, the Senate control market dashboard tracks the implied probability of each party controlling the Senate after the November election. You’ll find the current odds, a price history chart showing how those odds have changed over time, and the 24-hour trading volume, which currently stands at $200. The total volume for this market is $17,924. This information allows you to gauge market sentiment and see how predictions are evolving as new information becomes available.

Currently, prediction market odds suggest a different outcome than many traditional polls. While polls show a close race, this market indicates a stronger likelihood of one party gaining control. The difference between prediction market probabilities and polling averages can stem from several factors, including the incentives of traders who have ‘skin in the game’ and the ability of markets to quickly incorporate new information. This discrepancy represents a divergence in expectations, and it’s important to consider both sources when forming your own view.

On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief about the outcome. The price of these shares directly reflects the implied probability of each outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price fluctuates based on supply and demand, driven by new information, political developments, and traders’ evolving perspectives. Higher demand for shares indicating a particular outcome will drive up the price, and vice versa.

This market resolves around Nov 3, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on which party controls a majority of seats in the Senate following the November election. The final Senate composition will be determined by the official election results and any subsequent recounts or legal challenges. The platform will rely on widely accepted sources to verify the final outcome and settle the market accordingly.

Several factors could significantly impact this market. Major economic announcements, unexpected shifts in polling data, key campaign events like debates, and any significant news regarding candidates could all cause the odds to shift. Furthermore, unforeseen political developments, such as a major scandal or a change in leadership, could also have a substantial effect. Any event that alters perceptions of a party's chances of winning key Senate races is likely to influence trading activity and move this market.