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Will Seth Moulton be the Democratic nominee for Senate in Massachusetts?

13.5%
Consensus Probability (Model B — Geometric Mean of Odds)
2 platforms · 9pp spread · $1K

Across 2 prediction market platforms, "Will Seth Moulton be the Democratic nominee for Senate in Massachusetts?" has a consensus probability of 13.5%. Polymarket: 9.5%, Manifold: 18.8%. Consensus via geometric mean of odds (Satopaa et al., 2014), validated by IARPA ACE tournament.

Platform Comparison — white line = consensus
Polymarket
View →
10%
$1K
Manifold
View →
19%
22 traders
Probability Over Time
All 6 Consensus Models
Market Details
Polymarket
Updated 4m ago
Volume
$1K
Liquidity
$8K
Bid / Ask
6.0% / 13.0%
Spread
7.0%
Opened
Apr 2026
Resolves
Sep 2026
This market will resolve according to the winner of the Democratic Primary for United States Senator from Massachusetts. If no 2026 Massachusetts Democratic Senate Primary takes place, this market will resolve to "Other". The resolution source for this market will be the first …
Manifold
Updated 3h ago
Volume
Liquidity
Bid / Ask
— / —
Spread
Opened
Apr 2026
Resolves
Sep 2026

About This Consensus

Computed from 2 platforms using geometric mean of odds (Satopaa et al., 2014). This method was validated by the IARPA ACE forecasting tournament as the most accurate probability aggregation technique. Full methodology →

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