This market has closed
Trading ended on Mar 17, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets
Odds by venue
Fair chance strips out each venue’s built-in margin (its prices add up to more than 100%), then blends the venues by how much has traded there, so the outcomes add up to 100%. 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 195 days ago. Ages are as of when this page was built.
- Polymarket
Stratton 6–9%95.2%98.1%95.2% fair96.3¢ bid, 99.9¢ askpolled, 4701 h ago99.9¢ on Polymarket$100 pays $100 (1.00x)Stratton 6–9%95.2%Polymarket 98.1%(95.2% fair)polled, 4701 h agoBest Yes 99.9¢ on Polymarket, $100 pays $100 (1.00x)
- Contract
- Stratton 6–9%
- Last price
- 98.1%
- Fair, margin removed
- 95.2%
- As of
- Polled 195 d ago
- Buy Yes
- 99.9¢
- Sell Yes
- 96.3¢
- $100 on Yes pays
- $100 (1.00x)
- Volume
- $5K
Stratton 9%+2.4%2.5%0.1¢ bid, 4.8¢ askpolled, 4701 h ago4.8¢ on Polymarket$100 pays $2,083 (20.8x)Stratton 9%+2.4%Polymarket 2.5%polled, 4701 h agoBest Yes 4.8¢ on Polymarket, $100 pays $2,083 (20.8x)
- Contract
- Stratton 9%+
- Last price
- 2.5%
- As of
- Polled 195 d ago
- Buy Yes
- 4.8¢
- Sell Yes
- 0.1¢
- $100 on Yes pays
- $2,083 (20.8x)
- Volume
- $2K
Stratton 3–6%1.7%1.8%0.1¢ bid, 3.5¢ askpolled, 4701 h ago3.5¢ on Polymarket$100 pays $2,857 (28.6x)Stratton 3–6%1.7%Polymarket 1.8%polled, 4701 h agoBest Yes 3.5¢ on Polymarket, $100 pays $2,857 (28.6x)
- Contract
- Stratton 3–6%
- Last price
- 1.8%
- As of
- Polled 195 d ago
- Buy Yes
- 3.5¢
- Sell Yes
- 0.1¢
- $100 on Yes pays
- $2,857 (28.6x)
- Volume
- $5K
Krishnamoorthi 9%+0.5%0.5%— bid, 1¢ askpolled, 4701 h ago1¢ on Polymarket$100 pays $10,000 (100x)Krishnamoorthi 9%+0.5%Polymarket 0.5%polled, 4701 h agoBest Yes 1¢ on Polymarket, $100 pays $10,000 (100x)
- Contract
- Krishnamoorthi 9%+
- Last price
- 0.5%
- As of
- Polled 195 d ago
- Buy Yes
- 1¢
- Sell Yes
- —
- $100 on Yes pays
- $10,000 (100x)
- Volume
- $4K
Krishnamoorthi <3%0.1%0.1%— bid, 0.1¢ askpolled, 4701 h ago0.1¢ on Polymarket$100 pays $100,000 (1000x)Krishnamoorthi <3%0.1%Polymarket 0.1%polled, 4701 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
- Contract
- Krishnamoorthi <3%
- Last price
- 0.1%
- As of
- Polled 195 d ago
- Buy Yes
- 0.1¢
- Sell Yes
- —
- $100 on Yes pays
- $100,000 (1000x)
Krishnamoorthi 3–6%0.1%0.1%— bid, 0.2¢ askpolled, 4701 h ago0.2¢ on Polymarket$100 pays $50,000 (500x)Krishnamoorthi 3–6%0.1%Polymarket 0.1%polled, 4701 h agoBest Yes 0.2¢ on Polymarket, $100 pays $50,000 (500x)
- Contract
- Krishnamoorthi 3–6%
- Last price
- 0.1%
- As of
- Polled 195 d ago
- Buy Yes
- 0.2¢
- Sell Yes
- —
- $100 on Yes pays
- $50,000 (500x)
- Volume
- $2K
Krishnamoorthi 6–9%0%0.1%— bid, 0.1¢ askpolled, 4701 h ago0.1¢ on Polymarket$100 pays $100,000 (1000x)Krishnamoorthi 6–9%0%Polymarket 0.1%polled, 4701 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
- Contract
- Krishnamoorthi 6–9%
- Last price
- 0.1%
- As of
- Polled 195 d ago
- Buy Yes
- 0.1¢
- Sell Yes
- —
- $100 on Yes pays
- $100,000 (1000x)
Stratton <3%0%0.1%— bid, 0.1¢ askpolled, 4701 h ago0.1¢ on Polymarket$100 pays $100,000 (1000x)Stratton <3%0%Polymarket 0.1%polled, 4701 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
- Contract
- Stratton <3%
- Last price
- 0.1%
- As of
- Polled 195 d ago
- Buy Yes
- 0.1¢
- Sell Yes
- —
- $100 on Yes pays
- $100,000 (1000x)
- Volume
- $3K
Who resolves this market
- Polymarket resolves via:

- UMA optimistic oracle
How the odds have moved
The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.
- Stratton 6–9%
- Stratton 9%+
- Stratton 3–6%
About this market
Final prediction market prices for "Illinois Democratic Senate Primary Margin of Victory". Stratton 6–9% last traded at 95.2%. Next is Stratton 9%+ at 2.4%. $24K has traded across 8 outcomes on Polymarket. The market closed on Mar 17, 2026.
The Democratic Primary for United States Senator from Illinois is scheduled for March 17, 2026. This market will resolve according to the margin of victory between the top two candidates in the Democratic Primary election for United States Senator from Illinois. For the purpose of this market, 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. If the reported value falls exactly between two brackets, then this market will resolve to the higher placed bracket. If two candidates receive the same number of valid votes, this market will resolve to the lowest margin of victory bracket for the tied candidate whose last name comes first alphabetically. This market will resolve based on the official vote count once the count has been made official. If the results of the specified election are not known definitively by November 30, 2026, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be official election results published by the Illinois State Board of Elections (https://www.elections.il.gov/electionoperations/ElectionResults.aspx); however, an overwhelming consensus of credible reporting may suffice. 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.
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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