Market comparison

MI-01 House Election Winner

2 venues · 2 outcome rows · 2 comparable lines · event identity linked · 0 verified parity · active

Kalshi

Open venue ↗

2 outcomes · $25K reported volume

Observed 2m ago

Recorded venue end date: Nov 3, 2027

Polymarket

Open venue ↗

8 outcomes · $24K reported volume

Observed 36s ago

Recorded venue end date: Nov 4, 2026

Check settlement rules before comparing contracts. Matched outcomes may settle differently. These venues also report end dates more than 48 hours apart; event identity does not mean the contracts close or settle together. These are stored prices; record update times do not certify live quotes. Differences exclude fees and available size.

Known rule differences between venues

Kalshi settles on the party of the officeholder sworn in/inaugurated for the new term; Polymarket settles on the party of the called winner. They differ if the winner dies, withdraws or is not seated before the term starts.
Independents: Polymarket assigns a non-affiliated winner by stated caucus (House) or excludes independents from party options (Senate/Governor); Kalshi requires party membership.
Kalshi may close early on a media-consensus projection; Polymarket resolves on consensus calls with certification as the fallback.

A shared identity alone does not make a price difference executable.

Available outcome prices by venue for MI-01 House Election Winner
Outcome	Kalshi	Polymarket	Difference
Democratic Partial parity Payoffs match in ordinary outcomes; see the rule differences above.	11.0% Bid 11.0% · Ask 12.0% Callie Barr Open Kalshi ↗	12.3% Bid 11.7% · Ask 13.0% Callie Barr (D) Open Polymarket ↗	1.3 pp
Republican Partial parity Payoffs match in ordinary outcomes; see the rule differences above.	89.0% Bid 88.0% · Ask 89.0% Jack Bergman Open Kalshi ↗	87.5% Bid 87.0% · Ask 88.0% Jack Bergman (R) Open Polymarket ↗	1.5 pp