2028 contracts lead the politics board: Polymarket's Democratic nominee event has $1.30bn in lifetime notional

Ranked by lifetime notional at $1 face per contract. This is the number of contracts traded since listing, each trade counted once. It is not cash paid. 'Open' means events with at least one market open at the check time; totals include the event's already-settled markets. Polymarket here means its international platform (polymarket.com), not Polymarket US. Neither venue is open to UK residents for trading. Not investment advice.

The board

1. Polymarket (intl): Democratic Presidential Nominee 2028 $1.30bn
2. Polymarket (intl): Presidential Election Winner 2028 $719.0m
3. Polymarket (intl): Republican Presidential Nominee 2028 $716.6m
4. Kalshi: 2028 Democratic presidential nominee $247.1m
5. Polymarket (intl): Brazil Presidential Election $197.8m

Sources

1. gamma-api.polymarket.com gamma-api.polymarket.com/events?slug=democratic-presidential-nominee-2028
2. gamma-api.polymarket.com gamma-api.polymarket.com/events?slug=presidential-election-winner-2028
3. gamma-api.polymarket.com gamma-api.polymarket.com/events?slug=republican-presidential-nominee-2028
4. api.elections.kalshi.com api.elections.kalshi.com/trade-api/v2/events/KXPRESNOMD-28?with_nested_markets=true
5. gamma-api.polymarket.com gamma-api.polymarket.com/events?slug=brazil-presidential-election

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