
TX-18 House Election Margin of Victory
PM $17.9K
1
10
TX-18 House Election Margin of Victory

PM $17.9K
1
10
Current odds
Snapshot from
As of Oct 21, 2026, 12:00 AM UTC, the highest-priced outcome on Polymarket is Democrat 60-65% at 35.5%.
Polymarket
- Democrat 60-65%35.5%
- Democrat 55-60%17.5%
- Democrat 65-70%15%
- Democrat 50-55%11.5%
- Democrat 70-75%8%
Yes prices. They are not order quotes; check each platform's rules, fees and live prices before trading.
AI Analysis
Trader mode: Market mechanics, assumptions and risks
PM $17.9K
Reported volume ยท provider units
10
Saved contracts
0
Same-question pairs
Source snapshot: Oct 21, 2026, 12:00 AM UTC
About This Event
The 2026 TX-18 House election is currently expected to be held on November 3, 2026. This market will resolve according to the margin of victory between the top two candidates in the specified election. The "margin of victory" is defined as the absolute difference between the percentages of valid votes received by the first-place and second-place candidates. Percentages of the valid votes received by each candidate will be determined by dividing the total number of valid votes each of the top two candidates receives by the sum of all valid votes cast in the election. For purposes of this market, candidates nominated by the Democratic & Republican Parties will represent the options for "Democrat" and "Republican," respectively. Independent candidates will not represent options for either party. The candidates may be named in the contract for the convenience of traders. In the event that any named candidate is replaced as the nominee of their respective party prior to election day, the name in the contract will be updated and the market will resolve based on the replacement nominee of the party. If the reported value falls exactly between two brackets, then this market will resolve to the higher margin bracket. If two or more candidates tie for the most valid votes in this election, and the tie is between two candidates listed, this market will resolve to the lowest margin bracket for the candidate whose ballot-listed last name comes first in alphabetical order. If the tie is between a listed candidate and an unlisted candidate, this market will resolve to the lowest margin bracket for the listed candidate. If the tie is between two or more unlisted candidates, this market will resolve to "Other." If the listed candidate is represented in this market group as "Republican" or "Democrat" their ballot-listed last name will still be used for tiebreaking. This market will resolve based on the official vote count once the count has been made official. If the election results are not known definitively by June 30, 2027, 11:59 PM ET, this market will resolve to "Other". If a recount is initiated before the vote total has been made official, the market will remain open until the recount is completed and the vote is made official. The primary resolution source for this market will be the official results of the 2026 TX-18 House election as published by the state electoral authority responsible for certifying the results of the election; however, an overwhelming consensus of credible reporting may also be used.
This analysis is awaiting a background update, so its prices may be older than the odds above.
Snapshot observed 2026-10-16T00:00:06.034Z. This analysis describes that snapshot and is not a live news update.
What the contract measures
This event, "TX-18 House Election Margin of Victory," resolves on the margin between the top two candidates, defined as the absolute difference between their percentages of valid votes [1]. The rules say that candidates nominated by the Democratic and Republican Parties represent "Democrat" and "Republican," and that independents do not count as either option [1]. If a reported value falls exactly on a boundary, the market resolves to the higher margin bracket [1].
The rules also state that the market resolves on the official vote count, and that if results are not known definitively by June 30, 2027, 11:59 PM ET, it resolves to "Other" [1]. That date is a fallback condition in the contract, not an announced event date. The rules describe the election as "currently expected to be held on November 3, 2026," and list an end time of 2026-11-04T04:59:00.000Z [1].
Not every contract in the group uses margin brackets. The final contract asks whether the Republican Party candidate wins the election outright, so its wording differs from the bracket contracts [1].
Reading the snapshot
The saved observation time is 2026-10-16T00:00:06Z, and the source was retrieved at 2026-10-16T00:10:23Z [1]. These prices describe that saved moment only. They are not live quotes and are not verified probabilities.
Among the Democratic margin brackets, the 60% to 65% contract had the highest Yes price at 0.345, followed by 55% to 60% at 0.195 and 50% to 55% at 0.165 [1]. The Republican winner contract was priced at 0.002 Yes [1]. The sample includes all 10 saved markets for this event, and the saved data does not show a partial sample [1].
Yes prices across the bracket contracts sum to about 1.025 in this snapshot, so they are not exactly internally consistent. Differences in quoted prices between contracts reflect different wording and settlement conditions, so they should not be treated as an arbitrage signal.
What remains uncertain
The evidence does not explain why any price was at its level, how many traders hold each view, or what volume means for liquidity. The sample warning notes that the listed markets do not establish that every real-world outcome is included [1]. Because the saved data contains only this platform's contracts, no cross-platform comparison is possible here.
References
- Polymarket: TX-18 House Election Margin of Victory. Provider data observed 2026-10-16T00:00:06.034Z.
AI-generated analysis based on market data. Not financial advice.
Saved Oct 16, 2026 UTCAI-written background. References identify the evidence used; Wikipedia links under Learn More are additional reading. Prices and provider rules are dated snapshots. This is not financial advice.
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Prices are catalog snapshots and may have changed. Check each market's rules and observation time.

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Price gaps of 2 pp+
0
Same-question pairs
0
No outcomes on this page have been reviewed as the same question on both platforms yet.
Price differences do not establish arbitrage. Check each pair's review, current order prices, fees and settlement rules.

