Live Odds · Updated October 24, 2026

IA-03 House Election Winner

As of October 24, 2026, 08:15 PM ET, Polymarket traders price Sarah Trone Garriott (D) at 85.0% in IA-03 House Election Winner — $16.6K traded so far.

Last updated October 24, 2026, 08:08 PM ET with live prices from Polymarket. 24h volume: $70.
Leading outcome
Sarah Trone Garriott (D)
85%
A 85.0% price implies roughly a 85-in-100 chance, set by traders risking real money.
7D +3.5 pts30D +8.5 pts
Sarah Trone Garriott (D)85.0%
Zach Nunn (R)15.5%
Bid
84¢
Ask
86¢
Spread
2¢
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Range since December 16, 2025: 41.0% – 85.0% · Opened at 46.5%

Market facts

Event data
Event
IA-03 House Election Winner
Category
Midterms, House Elections, Iowa Midterm, US Election, Key House Races, Politics, Nov 4 Elections, Elections, Tossup House Races
Scheduled end
November 03, 2026, 11:59 PM ET
Total volume
$16.6K
Volume (24h)
$70
Liquidity
$128.3K
Markets
8
Leading outcome
Sarah Trone Garriott (D) — 85.0%
Resolution source
https://www.fec.gov/

What is the current price?

Momentum & history

The leading outcome, Sarah Trone Garriott (D), is priced at 85.0%.

Price changes for the leading market — past week: +3.5 pts; past month: +8.5 pts.

Since December 16, 2025, Sarah Trone Garriott (D) has traded between 41.0% and 85.0%. It opened at 46.5% and last traded at 85.0%.

DayClose
Oct 15, 202681.5%
Oct 16, 202681.5%
Oct 18, 202681.5%
Oct 19, 202682.0%
Oct 20, 202681.5%
Oct 22, 202683.0%
Oct 23, 202685.0%

Who is favored to win?

Outcomes

Sarah Trone Garriott (D) is favored at 85.0%.

OutcomePriceImplied probability24h changeVolumeVolume share
Sarah Trone Garriott (D)85¢85.0%—$7.2K43.4%
Zach Nunn (R)16¢15.5%—$9.4K56.6%

See the full live book for this market on Polymarket

The leading market's spread is 2¢ (bid 84¢ / ask 86¢) — a tighter spread means cheaper round-trip trading.

How much has been traded?

Volume

$16.6K has been traded on this event in total, $70 of it in the last 24 hours, across 8 markets.

When does this market resolve?

Rules

This market is scheduled to end November 03, 2026, 11:59 PM ET.

This market will resolve according to the party of the candidate who wins the IA-03 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026. ​​A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources. This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).

Resolution source: https://www.fec.gov/

What do the biggest traders hold?

Top holders

The largest current holder of the leading market holds 992 shares of Yes.

HolderOutcome heldSharesValue at current price
Trusty-GuidanceYes992$843
0xa5ef39c3…No732$110
Little-GoldYes561$477
Skeletal-LiverNo348$52
Prickly-EyrieNo156$23
Known-UseNo155$23
Frozen-CarYes144$123
Tense-FortNo126$19
Disloyal-Cape-TonightNo120$18
Belated-GlueNo112$17

What are the latest trades?

Tape
BUY Yes — $492 at 82.0%SELL Yes — $203 at 81.0%BUY Yes — $102 at 82.0%
TimeOutcomeSidePriceSize
Oct 23, 11:08 PM ETYesBUY86.0%$20
Oct 23, 11:08 PM ETYesBUY86.0%$20
Oct 23, 11:08 PM ETYesBUY86.0%$20
Oct 23, 12:36 PM ETYesBUY16.0%$8
Oct 23, 10:14 AM ETYesBUY14.0%$1
Oct 23, 09:37 AM ETYesBUY15.0%$15
Oct 23, 09:35 AM ETNoSELL84.0%$1
Oct 23, 09:24 AM ETYesBUY15.0%$15
Oct 23, 09:18 AM ETYesSELL13.0%$17
Oct 23, 09:18 AM ETYesSELL13.0%$17

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Frequently asked questions

FAQ

What are the odds of IA-03 House Election Winner?

As of October 24, 2026, 08:08 PM ET, the leading outcome is Sarah Trone Garriott (D) at 85.0%. Next is Zach Nunn (R) at 15.5%. See the live book on Polymarket: https://polymarket.com/event/ia-03-house-election-winner?via=bro

How much money has been traded on IA-03 House Election Winner?

$16.6K in total volume, with $70 traded in the last 24 hours across 8 markets.

When does IA-03 House Election Winner end?

The market is scheduled to end November 03, 2026, 11:59 PM ET. It resolves based on https://www.fec.gov/.

What is the most likely outcome of IA-03 House Election Winner, according to Polymarket traders?

Sarah Trone Garriott (D), priced at 85.0% as of October 24, 2026, 08:08 PM ET. Prices are implied probabilities backed by real-money trading.

Browse the live odds index, today's biggest movers, and Whale Watch for the largest positions.

⚠️ Not financial advice: odds swing hard on news. Never bet money you can't afford to lose, and always read a market's resolution rules before trading.

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