Rubio flips Vance for GOP nomination by October 31? Odds & Prediction Markets

Name: Rubio flips Vance for GOP nomination by October 31?
Start: 2026-09-22T01:40:42.000Z
End: 2026-11-01T03:59:00.000Z

Description

This market will resolve to "Yes" if Marco Rubio's hourly odds value is higher than JD Vance's hourly odds value in the "2028 Republican Nomination" listing on PredictionMarketOdds.com for 4 consecutive hourly odds values, all published for a datapoint between market creation and November 1, 2026, 12:00 AM ET. Otherwise, this market will resolve to "No". 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). An hour in which the two values are equal does not count as Marco Rubio being higher and ends any run of consecutive hourly odds values. Hours for which PredictionMarketOdds.com publishes no hourly odds value for either option (shown as "NO_PRINT") will be disregarded and will neither count toward nor end a run of consecutive hourly odds values. If PredictionMarketOdds.com permanently ceases publishing hourly odds values for Marco Rubio or JD Vance in the "2028 Republican Nomination" listing before November 1, 2026, 12:00 AM ET, 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 values have been published for both Marco Rubio and JD Vance between market creation and November 1, 2026, 12:00 AM ET, this market will resolve to "No". If the underlying market is officially decided before the listed end date, this market will resolve to "Yes" if Marco Rubio is the outcome of the underlying market and otherwise to "No". 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 Marco Rubio and JD Vance in the "2028 Republican Nomination" listing at https://predictionmarketodds.com/gop-nomination-2028.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 "Yes" if Marco Rubio's hourly odds value is higher than JD Vance's hourly odds value in the "2028 Republican Nomination" listing on PredictionMarketOdds.com for 4 consecutive hourly odds values, all published for a datapoint between market creation and November 1, 2026, 12:00 AM ET. Otherwise, this market will resolve to "No". 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). An hour in which the two values are equal does not count as Marco Rubio being higher and ends any run of consecutive hourly odds values. Hours for which PredictionMarketOdds.com publishes no hourly odds value for either option (shown as "NO_PRINT") will be disregarded and will neither count toward nor end a run of consecutive hourly odds values. If PredictionMarketOdds.com permanently ceases publishing hourly odds values for Marco Rubio or JD Vance in the "2028 Republican Nomination" listing before November 1, 2026, 12:00 AM ET, 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 values have been published for both Marco Rubio and JD Vance between market creation and November 1, 2026, 12:00 AM ET, this market will resolve to "No". If the underlying market is officially decided before the listed end date, this market will resolve to "Yes" if Marco Rubio is the outcome of the underlying market and otherwise to "No". 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 Marco Rubio and JD Vance in the "2028 Republican Nomination" listing at https://predictionmarketodds.com/gop-nomination-2028.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 dashboard for the Ohio Senate nomination market tracks the probabilities associated with whether Rubio will flip Vance for the GOP nomination by October 31. You can view the current odds represented as a percentage chance, along with the total volume traded, which currently stands at $8,400, and the 24-hour volume, at $28. This allows you to see how traders are collectively assessing the likelihood of this outcome and how activity has changed over time. The dashboard provides a real-time view of market sentiment.

On Polymarket, this market is priced through a continuous trading mechanism where participants buy and sell shares representing their belief in the outcome. The price of these shares directly reflects the implied probability of Rubio flipping Vance for the GOP nomination. As more traders buy shares, the price increases, indicating a higher perceived chance of the event occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market’s price is determined solely by supply and demand within Polymarket, and is not influenced by external factors or opinions.

This market resolves around Nov 1, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on whether Rubio officially receives the GOP nomination for the Ohio Senate seat, effectively flipping the expected outcome where Vance was previously favored. The market will then determine if Rubio has secured the nomination by that date, based on publicly available and verified information. The outcome will be based on official election results and reporting from reputable news sources.

Several factors could significantly impact this market. Major endorsements of Rubio, significant fundraising gains, or damaging news stories about Vance could all shift trader sentiment. Changes in the broader political landscape, such as national trends favoring Rubio’s platform, could also play a role. Unexpected events, like a major scandal involving Vance, would likely cause a rapid adjustment in the odds. Any public statements from key political figures or shifts in media coverage could also influence trading activity in this market.

Rubio flips Vance for GOP nomination by October 31?

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