The 2026 Iowa Senate election is currently expected to be held on November 3, 2026.
Leading outcome
93.2%
93%
2 outcomes
Yes
No
Now Gained in 24h Lost in 24hChanges are in percentage points (pp).
Latest update
SurgeMonitoring onlyThe tracked probability rose to 93.15%, up 25.4 percentage points from 67.75% in the latest observation window. No evidence-qualified public source was supplied, so this remains a monitoring note rather than a causal explanation.
Yes: 68% → 93%
+25.4 ppOdds chart
Living timeline
Observed movement
Observed probability rose from 67.75% to 93.15% (+25.4 percentage points), from 2026-11-04T09:04:53.079Z to 2026-11-04T10:20:18.622Z (UTC).
Editorial research is deferred. This update preserves the observed market change. The cause of the move is not established.
The measured move
Yes: 67.75% → 93.15%
Probability moved from 67.75% to 93.15% (+25.4 percentage points). Observations were 1 hour 15 minutes 26 seconds apart: 2026-11-04 09:04:53 UTC to 2026-11-04 10:20:18 UTC.
Watch further market observations and reporting about this contract. This update has not been enrolled for editorial research.
No external sources are attached yet.
Observed movement
Observed probability fell from 83.85% to 67.75% (-16.1 percentage points), from 2026-11-04T08:47:58.404Z to 2026-11-04T09:04:53.079Z (UTC).
Observed movement
Observed probability rose from 65.9% to 83.85% (+17.95 percentage points), from 2026-11-04T08:18:01.365Z to 2026-11-04T08:47:58.404Z (UTC).
Observed movement
Observed probability fell from 90.5% to 65.9% (-24.6 percentage points), from 2026-11-04T08:05:30.498Z to 2026-11-04T08:18:01.365Z (UTC).
Observed movement
Observed probability rose from 83.1% to 90.5% (+7.4 percentage points), from 2026-11-04T07:48:57.106Z to 2026-11-04T08:05:30.498Z (UTC).
Market rules, made readable
Official descriptionRead the rules before reading the headline. Resolution wording decides the outcome, not the news.
The 2026 Iowa Senate 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.
PolySays is independent and is not affiliated with, endorsed by, sponsored by, or operated by Polymarket. PolySays provides informational and educational content only and does not provide financial, betting, investment, tax, or legal advice. Prediction markets involve risk, and regulatory status varies by jurisdiction.
Source market
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Story so far
MonitoringPolySays is monitoring this market.
No evidence-qualified explanation has been published yet.
No evidence logged yet. No catalyst, open question, or public source is attached to this story, and we won’t guess.
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 Iowa Senate 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.