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Politics·US Election

Massachusetts Democratic Senate Primary Margin of Victory

icon for Massachusetts Democratic Senate Primary Margin of Victory
Politics·US Election

Massachusetts Democratic Senate Primary Margin of Victory

Moulton <5% 69%

Markey 30–35% 35%

Markey 15–20% 35%

Markey 20–25% 34%

Polymarket
NEW

Moulton <5% 69%

Markey 30–35% 35%

Markey 15–20% 35%

Markey 20–25% 34%

Polymarket
NEW
icon for Markey 40%+

Markey 40%+

$16 Vol.

31%

icon for Markey 35–40%

Markey 35–40%

$16 Vol.

24%

icon for Markey 30–35%

Markey 30–35%

$16 Vol.

35%

icon for Markey 25–30%

Markey 25–30%

$33 Vol.

41%

icon for Markey 20–25%

Markey 20–25%

$16 Vol.

34%

icon for Markey 15–20%

Markey 15–20%

$16 Vol.

35%

icon for Markey 10–15%

Markey 10–15%

$16 Vol.

28%

icon for Markey 5–10%

Markey 5–10%

$16 Vol.

30%

icon for Markey <5%

Markey <5%

$16 Vol.

24%

icon for Moulton <5%

Moulton <5%

$16 Vol.

69%

icon for Moulton 5%+

Moulton 5%+

$101 Vol.

9%

The Massachusetts state primary is scheduled to be held on September 1, 2026. This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator. 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- 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 margin bracket. If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.” 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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.Recent polls from mid-August show incumbent Ed Markey expanding his lead over challenger Seth Moulton in the September 1 Democratic primary to double digits, with averages near 55% to 35% among likely voters. Earlier summer surveys had narrowed the gap along ideological lines, with Markey dominating progressives and Moulton stronger among moderates. Markey's advantages on trust and issue handling, plus his base mobilization, have widened the spread in recent surveys, though Moulton's focus on generational change and the final debate could still influence turnout. Trader pricing across margin buckets reflects uncertainty over the exact victory spread in this low-turnout contest.

The Massachusetts state primary is scheduled to be held on September 1, 2026.

This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator.

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- 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 margin bracket.

If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.”

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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”.

The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.
Volume
$278
End Date
Sep 1, 2026
Market Opened
Aug 20, 2026, 5:36 PM ET

Resolution Source

https://www.sec.state.ma.us/

Resolver

0x69c47De9D...
The Massachusetts state primary is scheduled to be held on September 1, 2026. This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator. 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- 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 margin bracket. If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.” 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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.
The Massachusetts state primary is scheduled to be held on September 1, 2026. This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator. 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- 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 margin bracket. If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.” 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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.Recent polls from mid-August show incumbent Ed Markey expanding his lead over challenger Seth Moulton in the September 1 Democratic primary to double digits, with averages near 55% to 35% among likely voters. Earlier summer surveys had narrowed the gap along ideological lines, with Markey dominating progressives and Moulton stronger among moderates. Markey's advantages on trust and issue handling, plus his base mobilization, have widened the spread in recent surveys, though Moulton's focus on generational change and the final debate could still influence turnout. Trader pricing across margin buckets reflects uncertainty over the exact victory spread in this low-turnout contest.

The Massachusetts state primary is scheduled to be held on September 1, 2026.

This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator.

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- 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 margin bracket.

If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.”

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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”.

The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.
Volume
$278
End Date
Sep 1, 2026
Market Opened
Aug 20, 2026, 5:36 PM ET

Resolution Source

https://www.sec.state.ma.us/

Resolver

0x69c47De9D...
The Massachusetts state primary is scheduled to be held on September 1, 2026. This market will resolve according to the margin of victory between the top two candidates in the Massachusetts Democratic Primary for U.S. Senator. 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- 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 margin bracket. If two candidates receive the exact same highest number of valid votes and both are listed, this market will resolve to the lowest bracket for the tied candidate whose last name comes first alphabetically. If only one of the tied candidates is listed, this market will resolve to the lowest bracket for that listed candidate. If neither tied candidate is listed, this market will resolve to “Other.” 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 December 31, 2026, 11:59 PM ET, this market will resolve to “Other”. The primary resolution source for this market will be information from the Commonwealth of Massachusetts, such as official statewide results published by the Massachusetts Secretary of the Commonwealth (https://www.sec.state.ma.us/); 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.

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Frequently Asked Questions

"Massachusetts Democratic Senate Primary Margin of Victory" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Markey 25–30%" at 41%, followed by "Markey 30–35%" at 35%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 41¢ implies that the market collectively assigns a 41% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Massachusetts Democratic Senate Primary Margin of Victory" is a newly created market on Polymarket, launched on Aug 20, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Massachusetts Democratic Senate Primary Margin of Victory," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Massachusetts Democratic Senate Primary Margin of Victory" is "Markey 25–30%" at 41%, meaning the market assigns a 41% chance to that outcome. The next closest outcome is "Markey 30–35%" at 35%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Massachusetts Democratic Senate Primary Margin of Victory" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.