The Prediction Markets

South Dakota Senate Election Margin of Victory

Closes
Nov 4, 2026, in 12 days
Traded
$41K
Venues
Polymarket, Kalshi
Prices updated
2 min ago
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What the markets expect

Rounds, 3+ pts 88%

Next is Rounds, 5+ pts at 83%. 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
Rounds, 3+ pts
88%
Kalshi 88%polled, 2 min agoBest Yes 95.3¢ on Kalshi, $100 pays $105 (1.05x)
Kalshi
Contract
Rounds, 3+ pts
Last price
88%
As of
Polled 2 min ago
Buy Yes
95.3¢
Sell Yes
87¢
$100 on Yes pays
$105 (1.05x)
Volume
$40
Trade this on Kalshi
Rounds, 5+ pts
83%
Kalshi 83%polled, 2 min agoBest Yes 94.4¢ on Kalshi, $100 pays $106 (1.06x)
Kalshi
Contract
Rounds, 5+ pts
Last price
83%
As of
Polled 2 min ago
Buy Yes
94.4¢
Sell Yes
83¢
$100 on Yes pays
$106 (1.06x)
Volume
$1
Trade this on Kalshi
Rounds, 7+ pts
77%
Kalshi 77%polled, 2 min agoBest Yes 88¢ on Kalshi, $100 pays $114 (1.14x)
Kalshi
Contract
Rounds, 7+ pts
Last price
77%
As of
Polled 2 min ago
Buy Yes
88¢
Sell Yes
77¢
$100 on Yes pays
$114 (1.14x)
Volume
$201
Trade this on Kalshi
Rounds, 9+ pts
71%
Kalshi 71%polled, 2 min agoBest Yes 81¢ on Kalshi, $100 pays $123 (1.23x)
Kalshi
Contract
Rounds, 9+ pts
Last price
71%
As of
Polled 2 min ago
Buy Yes
81¢
Sell Yes
71¢
$100 on Yes pays
$123 (1.23x)
Volume
$934
Trade this on Kalshi
Rounds, 11+ pts
62%
Kalshi 62%polled, 2 min agoBest Yes 74¢ on Kalshi, $100 pays $135 (1.35x)
Kalshi
Contract
Rounds, 11+ pts
Last price
62%
As of
Polled 2 min ago
Buy Yes
74¢
Sell Yes
62¢
$100 on Yes pays
$135 (1.35x)
Volume
$523
Trade this on Kalshi
Rounds, 13+ pts
53%
Kalshi 53%polled, 2 min agoBest Yes 65¢ on Kalshi, $100 pays $154 (1.54x)
Kalshi
Contract
Rounds, 13+ pts
Last price
53%
As of
Polled 2 min ago
Buy Yes
65¢
Sell Yes
53¢
$100 on Yes pays
$154 (1.54x)
Volume
$268
Trade this on Kalshi
Rounds, 15+ pts
44%
Kalshi 44%polled, 2 min agoBest Yes 49¢ on Kalshi, $100 pays $204 (2.04x)
Kalshi
Contract
Rounds, 15+ pts
Last price
44%
As of
Polled 2 min ago
Buy Yes
49¢
Sell Yes
43¢
$100 on Yes pays
$204 (2.04x)
Volume
$4K
Trade this on Kalshi
Republican 0-10%
38.3%
Polymarket 38.3%polled, 2 min agoBest Yes 47.7¢ on Polymarket, $100 pays $210 (2.10x)
Polymarket
Contract
Republican 0-10%
Last price
38.3%
As of
Polled 2 min ago
Buy Yes
47.7¢
Sell Yes
28.9¢
$100 on Yes pays
$210 (2.10x)
Volume
$3K
Trade this on Polymarket
Rounds, 17+ pts
34%
Kalshi 34%polled, 2 min agoBest Yes 46¢ on Kalshi, $100 pays $217 (2.17x)
Kalshi
Contract
Rounds, 17+ pts
Last price
34%
As of
Polled 2 min ago
Buy Yes
46¢
Sell Yes
34¢
$100 on Yes pays
$217 (2.17x)
Volume
$2K
Trade this on Kalshi
Rounds, 19+ pts
25%
Kalshi 25%polled, 2 min agoBest Yes 29¢ on Kalshi, $100 pays $345 (3.45x)
Kalshi
Contract
Rounds, 19+ pts
Last price
25%
As of
Polled 2 min ago
Buy Yes
29¢
Sell Yes
25¢
$100 on Yes pays
$345 (3.45x)
Volume
$547
Trade this on Kalshi
Show 17 more outcomes
Republican 10-15%
22%
Polymarket 22%polled, 2 min agoBest Yes 23¢ on Polymarket, $100 pays $435 (4.35x)
Polymarket
Contract
Republican 10-15%
Last price
22%
As of
Polled 2 min ago
Buy Yes
23¢
Sell Yes
21¢
$100 on Yes pays
$435 (4.35x)
Volume
$5K
Trade this on Polymarket
Republican 15-20%
18%
Polymarket 18%polled, 2 min agoBest Yes 19¢ on Polymarket, $100 pays $526 (5.26x)
Polymarket
Contract
Republican 15-20%
Last price
18%
As of
Polled 2 min ago
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Volume
$8K
Trade this on Polymarket
Rounds, 21+ pts
17%
Kalshi 17%polled, 2 min agoBest Yes 29¢ on Kalshi, $100 pays $345 (3.45x)
Kalshi
Contract
Rounds, 21+ pts
Last price
17%
As of
Polled 2 min ago
Buy Yes
29¢
Sell Yes
17¢
$100 on Yes pays
$345 (3.45x)
Volume
$1K
Trade this on Kalshi
Rounds, 23+ pts
13%
Kalshi 13%polled, 2 min agoBest Yes 21¢ on Kalshi, $100 pays $476 (4.76x)
Kalshi
Contract
Rounds, 23+ pts
Last price
13%
As of
Polled 2 min ago
Buy Yes
21¢
Sell Yes
9.6¢
$100 on Yes pays
$476 (4.76x)
Volume
$2K
Trade this on Kalshi
Rounds, 25+ pts
11%
Kalshi 11%polled, 2 min agoBest Yes 16¢ on Kalshi, $100 pays $625 (6.25x)
Kalshi
Contract
Rounds, 25+ pts
Last price
11%
As of
Polled 2 min ago
Buy Yes
16¢
Sell Yes
4.1¢
$100 on Yes pays
$625 (6.25x)
Volume
$1K
Trade this on Kalshi
Rounds, 27+ pts
8.3%
Kalshi 8.3%polled, 2 min agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
Rounds, 27+ pts
Last price
8.3%
As of
Polled 2 min ago
Buy Yes
12¢
Sell Yes
3¢
$100 on Yes pays
$833 (8.33x)
Volume
$711
Trade this on Kalshi
Rounds, 31+ pts
7.9%
Kalshi 7.9%polled, 2 min agoBest Yes 7.9¢ on Kalshi, $100 pays $1,266 (12.7x)
Kalshi
Contract
Rounds, 31+ pts
Last price
7.9%
As of
Polled 2 min ago
Buy Yes
7.9¢
Sell Yes
3¢
$100 on Yes pays
$1,266 (12.7x)
Volume
$1K
Trade this on Kalshi
Independent Wins
6.8%
Polymarket 6.8%polled, 2 min agoBest Yes 6.8¢ on Polymarket, $100 pays $1,471 (14.7x)
Polymarket
Contract
Independent Wins
Last price
6.8%
As of
Polled 2 min ago
Buy Yes
6.8¢
Sell Yes
6.7¢
$100 on Yes pays
$1,471 (14.7x)
Volume
$2K
Trade this on Polymarket
Republican 20-25%
6%
Polymarket 6%polled, 2 min agoBest Yes 9¢ on Polymarket, $100 pays $1,111 (11.1x)
Polymarket
Contract
Republican 20-25%
Last price
6%
As of
Polled 2 min ago
Buy Yes
9¢
Sell Yes
3¢
$100 on Yes pays
$1,111 (11.1x)
Volume
$2K
Trade this on Polymarket
Rounds, 29+ pts
5.2%
Kalshi 5.2%polled, 2 min agoBest Yes 7.3¢ on Kalshi, $100 pays $1,370 (13.7x)
Kalshi
Contract
Rounds, 29+ pts
Last price
5.2%
As of
Polled 2 min ago
Buy Yes
7.3¢
Sell Yes
3¢
$100 on Yes pays
$1,370 (13.7x)
Trade this on Kalshi
Republican 25-30%
4.5%
Polymarket 4.5%polled, 2 min agoBest Yes 4.9¢ on Polymarket, $100 pays $2,041 (20.4x)
Polymarket
Contract
Republican 25-30%
Last price
4.5%
As of
Polled 2 min ago
Buy Yes
4.9¢
Sell Yes
4¢
$100 on Yes pays
$2,041 (20.4x)
Volume
$2K
Trade this on Polymarket
Republican 30-35%
4.3%
Polymarket 4.3%polled, 2 min agoBest Yes 8¢ on Polymarket, $100 pays $1,250 (12.5x)
Polymarket
Contract
Republican 30-35%
Last price
4.3%
As of
Polled 2 min ago
Buy Yes
8¢
Sell Yes
0.5¢
$100 on Yes pays
$1,250 (12.5x)
Volume
$1K
Trade this on Polymarket
Rounds, 33+ pts
3.6%
Kalshi 3.6%polled, 2 min agoBest Yes 7¢ on Kalshi, $100 pays $1,429 (14.3x)
Kalshi
Contract
Rounds, 33+ pts
Last price
3.6%
As of
Polled 2 min ago
Buy Yes
7¢
Sell Yes
0.1¢
$100 on Yes pays
$1,429 (14.3x)
Trade this on Kalshi
Rounds, 35+ pts
3.2%
Kalshi 3.2%polled, 2 min agoBest Yes 6.4¢ on Kalshi, $100 pays $1,563 (15.6x)
Kalshi
Contract
Rounds, 35+ pts
Last price
3.2%
As of
Polled 2 min ago
Buy Yes
6.4¢
Sell Yes
—
$100 on Yes pays
$1,563 (15.6x)
Trade this on Kalshi
Republican 35-40%
2.9%
Polymarket 2.9%polled, 2 min agoBest Yes 5.1¢ on Polymarket, $100 pays $1,961 (19.6x)
Polymarket
Contract
Republican 35-40%
Last price
2.9%
As of
Polled 2 min ago
Buy Yes
5.1¢
Sell Yes
0.7¢
$100 on Yes pays
$1,961 (19.6x)
Volume
$1K
Trade this on Polymarket
Republican 40-45%
0.6%
Polymarket 0.6%polled, 2 min agoBest Yes 0.9¢ on Polymarket, $100 pays $11,111 (111x)
Polymarket
Contract
Republican 40-45%
Last price
0.6%
As of
Polled 2 min ago
Buy Yes
0.9¢
Sell Yes
0.2¢
$100 on Yes pays
$11,111 (111x)
Volume
$854
Trade this on Polymarket
Republican 45%+
0.5%
Polymarket 0.5%polled, 2 min agoBest Yes 0.9¢ on Polymarket, $100 pays $11,111 (111x)
Polymarket
Contract
Republican 45%+
Last price
0.5%
As of
Polled 2 min ago
Buy Yes
0.9¢
Sell Yes
0.1¢
$100 on Yes pays
$11,111 (111x)
Volume
$983
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.

  • Rounds, 3+ pts
  • Rounds, 5+ pts
  • Rounds, 7+ 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 Rounds, 3+ pts for this event.

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

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 "South Dakota Senate Election Margin of Victory". Rounds, 3+ pts leads at 88%. Next is Rounds, 5+ pts at 83%. $41K has traded across 27 outcomes on Polymarket and Kalshi. The market is expected to resolve by Nov 4, 2026.

The 2026 South Dakota 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 South Dakota 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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