The Prediction Markets

MA-03 House Election Margin of Victory

Closes
Nov 4, 2026, in 11 days
Traded
$15K
Venues
Polymarket, Kalshi
Prices updated
2 min ago
Share

What the markets expect

Trahan, 19+ pts 95.5%

Next is Trahan, 16+ pts at 93.1%. 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 3 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
Trahan, 19+ pts
95.5%
Kalshi 95.5%polled, 3 min agoBest Yes 99.2¢ on Kalshi, $100 pays $101 (1.01x)
Kalshi
Contract
Trahan, 19+ pts
Last price
95.5%
As of
Polled 3 min ago
Buy Yes
99.2¢
Sell Yes
91.7¢
$100 on Yes pays
$101 (1.01x)
Trade this on Kalshi
Trahan, 16+ pts
93.1%
Kalshi 93.1%polled, 3 min agoBest Yes 99.2¢ on Kalshi, $100 pays $101 (1.01x)
Kalshi
Contract
Trahan, 16+ pts
Last price
93.1%
As of
Polled 3 min ago
Buy Yes
99.2¢
Sell Yes
93.1¢
$100 on Yes pays
$101 (1.01x)
Volume
$90
Trade this on Kalshi
Trahan, 22+ pts
89%
Kalshi 89%polled, 3 min agoBest Yes 99.1¢ on Kalshi, $100 pays $101 (1.01x)
Kalshi
Contract
Trahan, 22+ pts
Last price
89%
As of
Polled 3 min ago
Buy Yes
99.1¢
Sell Yes
89¢
$100 on Yes pays
$101 (1.01x)
Volume
$50
Trade this on Kalshi
Trahan, 25+ pts
86%
Kalshi 86%polled, 3 min agoBest Yes 95¢ on Kalshi, $100 pays $105 (1.05x)
Kalshi
Contract
Trahan, 25+ pts
Last price
86%
As of
Polled 3 min ago
Buy Yes
95¢
Sell Yes
84¢
$100 on Yes pays
$105 (1.05x)
Volume
$165
Trade this on Kalshi
Trahan, 28+ pts
74%
Kalshi 74%polled, 3 min agoBest Yes 86¢ on Kalshi, $100 pays $116 (1.16x)
Kalshi
Contract
Trahan, 28+ pts
Last price
74%
As of
Polled 3 min ago
Buy Yes
86¢
Sell Yes
74¢
$100 on Yes pays
$116 (1.16x)
Volume
$250
Trade this on Kalshi
Trahan, 31+ pts
61%
Kalshi 61%polled, 3 min agoBest Yes 73¢ on Kalshi, $100 pays $137 (1.37x)
Kalshi
Contract
Trahan, 31+ pts
Last price
61%
As of
Polled 3 min ago
Buy Yes
73¢
Sell Yes
61¢
$100 on Yes pays
$137 (1.37x)
Volume
$70
Trade this on Kalshi
Trahan, 34+ pts
53%
Kalshi 53%polled, 3 min agoBest Yes 59¢ on Kalshi, $100 pays $169 (1.69x)
Kalshi
Contract
Trahan, 34+ pts
Last price
53%
As of
Polled 3 min ago
Buy Yes
59¢
Sell Yes
47¢
$100 on Yes pays
$169 (1.69x)
Volume
$160
Trade this on Kalshi
Trahan, 37+ pts
33%
Kalshi 33%polled, 3 min agoBest Yes 45¢ on Kalshi, $100 pays $222 (2.22x)
Kalshi
Contract
Trahan, 37+ pts
Last price
33%
As of
Polled 3 min ago
Buy Yes
45¢
Sell Yes
33¢
$100 on Yes pays
$222 (2.22x)
Volume
$50
Trade this on Kalshi
Democrat 40-45%
30%
Polymarket 30%polled, 2 min agoBest Yes 31¢ on Polymarket, $100 pays $323 (3.23x)
Polymarket
Contract
Democrat 40-45%
Last price
30%
As of
Polled 2 min ago
Buy Yes
31¢
Sell Yes
29¢
$100 on Yes pays
$323 (3.23x)
Volume
$3K
Trade this on Polymarket
Democrat 35-40%
28%
Polymarket 28%polled, 2 min agoBest Yes 29¢ on Polymarket, $100 pays $345 (3.45x)
Polymarket
Contract
Democrat 35-40%
Last price
28%
As of
Polled 2 min ago
Buy Yes
29¢
Sell Yes
27¢
$100 on Yes pays
$345 (3.45x)
Volume
$3K
Trade this on Polymarket
Show 11 more outcomes
Trahan, 40+ pts
25%
Kalshi 25%polled, 3 min agoBest Yes 33¢ on Kalshi, $100 pays $303 (3.03x)
Kalshi
Contract
Trahan, 40+ pts
Last price
25%
As of
Polled 3 min ago
Buy Yes
33¢
Sell Yes
21¢
$100 on Yes pays
$303 (3.03x)
Volume
$521
Trade this on Kalshi
Democrat 30-35%
21%
Polymarket 21%polled, 2 min agoBest Yes 22¢ on Polymarket, $100 pays $455 (4.55x)
Polymarket
Contract
Democrat 30-35%
Last price
21%
As of
Polled 2 min ago
Buy Yes
22¢
Sell Yes
20¢
$100 on Yes pays
$455 (4.55x)
Volume
$2K
Trade this on Polymarket
Democrat 25-30%
14%
Polymarket 14%polled, 2 min agoBest Yes 15¢ on Polymarket, $100 pays $667 (6.67x)
Polymarket
Contract
Democrat 25-30%
Last price
14%
As of
Polled 2 min ago
Buy Yes
15¢
Sell Yes
13¢
$100 on Yes pays
$667 (6.67x)
Volume
$2K
Trade this on Polymarket
Trahan, 43+ pts
12.4%
Kalshi 12.4%polled, 3 min agoBest Yes 18¢ on Kalshi, $100 pays $556 (5.56x)
Kalshi
Contract
Trahan, 43+ pts
Last price
12.4%
As of
Polled 3 min ago
Buy Yes
18¢
Sell Yes
6.8¢
$100 on Yes pays
$556 (5.56x)
Trade this on Kalshi
Trahan, 46+ pts
5.5%
Kalshi 5.5%polled, 3 min agoBest Yes 9.9¢ on Kalshi, $100 pays $1,010 (10.1x)
Kalshi
Contract
Trahan, 46+ pts
Last price
5.5%
As of
Polled 3 min ago
Buy Yes
9.9¢
Sell Yes
1¢
$100 on Yes pays
$1,010 (10.1x)
Trade this on Kalshi
Democrat 20-25%
3.8%
Polymarket 3.8%polled, 2 min agoBest Yes 6.8¢ on Polymarket, $100 pays $1,471 (14.7x)
Polymarket
Contract
Democrat 20-25%
Last price
3.8%
As of
Polled 2 min ago
Buy Yes
6.8¢
Sell Yes
0.7¢
$100 on Yes pays
$1,471 (14.7x)
Volume
$568
Trade this on Polymarket
Democrat 45%+
2.5%
Polymarket 2.5%polled, 2 min agoBest Yes 4.4¢ on Polymarket, $100 pays $2,273 (22.7x)
Polymarket
Contract
Democrat 45%+
Last price
2.5%
As of
Polled 2 min ago
Buy Yes
4.4¢
Sell Yes
0.6¢
$100 on Yes pays
$2,273 (22.7x)
Volume
$881
Trade this on Polymarket
Democrat 15-20%
0.6%
Polymarket 0.6%polled, 2 min agoBest Yes 1¢ on Polymarket, $100 pays $10,000 (100x)
Polymarket
Contract
Democrat 15-20%
Last price
0.6%
As of
Polled 2 min ago
Buy Yes
1¢
Sell Yes
0.2¢
$100 on Yes pays
$10,000 (100x)
Volume
$401
Trade this on Polymarket
Republican Wins
0.3%
Polymarket 0.3%polled, 2 min agoBest Yes 0.5¢ on Polymarket, $100 pays $20,000 (200x)
Polymarket
Contract
Republican Wins
Last price
0.3%
As of
Polled 2 min ago
Buy Yes
0.5¢
Sell Yes
0.1¢
$100 on Yes pays
$20,000 (200x)
Volume
$376
Trade this on Polymarket
Democrat 0-5%
0.2%
Polymarket 0.2%polled, 2 min agoBest Yes 0.2¢ on Polymarket, $100 pays $50,000 (500x)
Polymarket
Contract
Democrat 0-5%
Last price
0.2%
As of
Polled 2 min ago
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$347
Trade this on Polymarket
Democrat 5-15%
0.2%
Polymarket 0.2%polled, 2 min agoBest Yes 0.2¢ on Polymarket, $100 pays $50,000 (500x)
Polymarket
Contract
Democrat 5-15%
Last price
0.2%
As of
Polled 2 min ago
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$378
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Secretary of the Commonwealth of Massachusetts

How the odds have moved

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

  • Trahan, 19+ pts
  • Trahan, 16+ pts
  • Trahan, 22+ 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 Trahan, 19+ pts for this event.

Top of book

Connecting
Best bid
—
Spread
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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 "MA-03 House Election Margin of Victory". Trahan, 19+ pts leads at 95.5%. Next is Trahan, 16+ pts at 93.1%. $15K has traded across 21 outcomes on Polymarket and Kalshi. The market is expected to resolve by Nov 4, 2026.

The 2026 MA-03 House 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 MA-03 House 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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