The Prediction Markets

Illinois Senate Election Margin of Victory

Closes
Nov 4, 2026, in 12 days
Traded
$8K
Venues
Polymarket, Kalshi
Prices updated
2 min ago
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What the markets expect

Stratton, 9+ pts 94.8%

Next is Stratton, 11+ pts at 88%. The venues list this event, but none of their outcomes are matched yet, so prices are shown separately.

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 2 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
Stratton, 9+ pts
94.8%
Kalshi 94.8%polled, 2 min agoBest Yes 94.8¢ on Kalshi, $100 pays $105 (1.05x)
Kalshi
Contract
Stratton, 9+ pts
Last price
94.8%
As of
Polled 2 min ago
Buy Yes
94.8¢
Sell Yes
85¢
$100 on Yes pays
$105 (1.05x)
Volume
$5
Trade this on Kalshi
Stratton, 11+ pts
88%
Kalshi 88%polled, 2 min agoBest Yes 90.1¢ on Kalshi, $100 pays $111 (1.11x)
Kalshi
Contract
Stratton, 11+ pts
Last price
88%
As of
Polled 2 min ago
Buy Yes
90.1¢
Sell Yes
85¢
$100 on Yes pays
$111 (1.11x)
Volume
$5
Trade this on Kalshi
Stratton, 13+ pts
83%
Kalshi 83%polled, 2 min agoBest Yes 83¢ on Kalshi, $100 pays $120 (1.20x)
Kalshi
Contract
Stratton, 13+ pts
Last price
83%
As of
Polled 2 min ago
Buy Yes
83¢
Sell Yes
77¢
$100 on Yes pays
$120 (1.20x)
Volume
$62
Trade this on Kalshi
Stratton, 15+ pts
77%
Kalshi 77%polled, 2 min agoBest Yes 77¢ on Kalshi, $100 pays $130 (1.30x)
Kalshi
Contract
Stratton, 15+ pts
Last price
77%
As of
Polled 2 min ago
Buy Yes
77¢
Sell Yes
69¢
$100 on Yes pays
$130 (1.30x)
Volume
$39
Trade this on Kalshi
Stratton, 17+ pts
68%
Kalshi 68%polled, 2 min agoBest Yes 68¢ on Kalshi, $100 pays $147 (1.47x)
Kalshi
Contract
Stratton, 17+ pts
Last price
68%
As of
Polled 2 min ago
Buy Yes
68¢
Sell Yes
58¢
$100 on Yes pays
$147 (1.47x)
Volume
$716
Trade this on Kalshi
Stratton, 19+ pts
55%
Kalshi 55%polled, 2 min agoBest Yes 61¢ on Kalshi, $100 pays $164 (1.64x)
Kalshi
Contract
Stratton, 19+ pts
Last price
55%
As of
Polled 2 min ago
Buy Yes
61¢
Sell Yes
50¢
$100 on Yes pays
$164 (1.64x)
Volume
$200
Trade this on Kalshi
Stratton, 21+ pts
48%
Kalshi 48%polled, 2 min agoBest Yes 52¢ on Kalshi, $100 pays $192 (1.92x)
Kalshi
Contract
Stratton, 21+ pts
Last price
48%
As of
Polled 2 min ago
Buy Yes
52¢
Sell Yes
41¢
$100 on Yes pays
$192 (1.92x)
Volume
$10
Trade this on Kalshi
Stratton, 23+ pts
43%
Kalshi 43%polled, 2 min agoBest Yes 43¢ on Kalshi, $100 pays $233 (2.33x)
Kalshi
Contract
Stratton, 23+ pts
Last price
43%
As of
Polled 2 min ago
Buy Yes
43¢
Sell Yes
32¢
$100 on Yes pays
$233 (2.33x)
Volume
$2
Trade this on Kalshi
Democrat 20-25%
31%
Polymarket 31%polled, 2 min agoBest Yes 33¢ on Polymarket, $100 pays $303 (3.03x)
Polymarket
Contract
Democrat 20-25%
Last price
31%
As of
Polled 2 min ago
Buy Yes
33¢
Sell Yes
29¢
$100 on Yes pays
$303 (3.03x)
Volume
$2K
Trade this on Polymarket
Stratton, 25+ pts
29.5%
Kalshi 29.5%polled, 2 min agoBest Yes 35¢ on Kalshi, $100 pays $286 (2.86x)
Kalshi
Contract
Stratton, 25+ pts
Last price
29.5%
As of
Polled 2 min ago
Buy Yes
35¢
Sell Yes
24¢
$100 on Yes pays
$286 (2.86x)
Trade this on Kalshi
Show 11 more outcomes
Stratton, 27+ pts
22.5%
Kalshi 22.5%polled, 2 min agoBest Yes 28¢ on Kalshi, $100 pays $357 (3.57x)
Kalshi
Contract
Stratton, 27+ pts
Last price
22.5%
As of
Polled 2 min ago
Buy Yes
28¢
Sell Yes
17¢
$100 on Yes pays
$357 (3.57x)
Trade this on Kalshi
Democrat 25-30%
19%
Polymarket 19%polled, 2 min agoBest Yes 20¢ on Polymarket, $100 pays $500 (5.00x)
Polymarket
Contract
Democrat 25-30%
Last price
19%
As of
Polled 2 min ago
Buy Yes
20¢
Sell Yes
18¢
$100 on Yes pays
$500 (5.00x)
Volume
$2K
Trade this on Polymarket
Democrat 15-20%
16.5%
Polymarket 16.5%polled, 2 min agoBest Yes 17¢ on Polymarket, $100 pays $588 (5.88x)
Polymarket
Contract
Democrat 15-20%
Last price
16.5%
As of
Polled 2 min ago
Buy Yes
17¢
Sell Yes
16¢
$100 on Yes pays
$588 (5.88x)
Volume
$2K
Trade this on Polymarket
Democrat 30-35%
15%
Polymarket 15%polled, 2 min agoBest Yes 16¢ on Polymarket, $100 pays $625 (6.25x)
Polymarket
Contract
Democrat 30-35%
Last price
15%
As of
Polled 2 min ago
Buy Yes
16¢
Sell Yes
14¢
$100 on Yes pays
$625 (6.25x)
Volume
$214
Trade this on Polymarket
Stratton, 29+ pts
15%
Kalshi 15%polled, 2 min agoBest Yes 21¢ on Kalshi, $100 pays $476 (4.76x)
Kalshi
Contract
Stratton, 29+ pts
Last price
15%
As of
Polled 2 min ago
Buy Yes
21¢
Sell Yes
11¢
$100 on Yes pays
$476 (4.76x)
Volume
$200
Trade this on Kalshi
Democrat 5-10%
11.7%
Polymarket 11.7%polled, 2 min agoBest Yes 18.3¢ on Polymarket, $100 pays $546 (5.46x)
Polymarket
Contract
Democrat 5-10%
Last price
11.7%
As of
Polled 2 min ago
Buy Yes
18.3¢
Sell Yes
5¢
$100 on Yes pays
$546 (5.46x)
Volume
$325
Trade this on Polymarket
Democrat 35%+
8.4%
Polymarket 8.4%polled, 2 min agoBest Yes 16.1¢ on Polymarket, $100 pays $621 (6.21x)
Polymarket
Contract
Democrat 35%+
Last price
8.4%
As of
Polled 2 min ago
Buy Yes
16.1¢
Sell Yes
0.7¢
$100 on Yes pays
$621 (6.21x)
Volume
$173
Trade this on Polymarket
Democrat 10-15%
6.5%
Polymarket 6.5%polled, 2 min agoBest Yes 12¢ on Polymarket, $100 pays $833 (8.33x)
Polymarket
Contract
Democrat 10-15%
Last price
6.5%
As of
Polled 2 min ago
Buy Yes
12¢
Sell Yes
0.9¢
$100 on Yes pays
$833 (8.33x)
Volume
$335
Trade this on Polymarket
Stratton, 31+ pts
6.2%
Kalshi 6.2%polled, 2 min agoBest Yes 16¢ on Kalshi, $100 pays $625 (6.25x)
Kalshi
Contract
Stratton, 31+ pts
Last price
6.2%
As of
Polled 2 min ago
Buy Yes
16¢
Sell Yes
5.4¢
$100 on Yes pays
$625 (6.25x)
Volume
$4
Trade this on Kalshi
Democrat 0-5%
1.9%
Polymarket 1.9%polled, 2 min agoBest Yes 3¢ on Polymarket, $100 pays $3,333 (33.3x)
Polymarket
Contract
Democrat 0-5%
Last price
1.9%
As of
Polled 2 min ago
Buy Yes
3¢
Sell Yes
0.7¢
$100 on Yes pays
$3,333 (33.3x)
Volume
$281
Trade this on Polymarket
Republican Wins
1.5%
Polymarket 1.5%polled, 2 min agoBest Yes 2.7¢ on Polymarket, $100 pays $3,704 (37.0x)
Polymarket
Contract
Republican Wins
Last price
1.5%
As of
Polled 2 min ago
Buy Yes
2.7¢
Sell Yes
0.3¢
$100 on Yes pays
$3,704 (37.0x)
Volume
$454
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: official election authority responsible for certifying results in

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Stratton, 9+ pts
  • Stratton, 11+ pts
  • Stratton, 13+ pts

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Polymarket

Polymarket doesn’t list Stratton, 9+ pts for this event.

Top of book

Connecting
Best bid
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Spread
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Best ask
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Depth · top 8 levels

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Recent trades

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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

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Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.04 × price × (1 − price) per share (politics rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "Illinois Senate Election Margin of Victory". Stratton, 9+ pts leads at 94.8%. Next is Stratton, 11+ pts at 88%. $8K has traded across 21 outcomes on Polymarket and Kalshi. The market is expected to resolve by Nov 4, 2026.

The 2026 Illinois 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. 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 Illinois 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.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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