SimpleFunctions
Winner-take-all answer·5 source contracts·Kalshi 5·refreshed just now·Closes Aug 7, 2028 · 774d

Which city will host the 2028 Democratic national convention

Leader sits at 21% across 5 bound outcomes, runner-up at 20%. This is a winner-take-all market — the headline is the leader’s price, not an arithmetic mean.

Leader probability

21%

Boston

runner-up 20¢leader 21¢

Outcomes

5

winner-take-all

Runner-up

20¢

Chicago

Spread

1pp

contested

24h volume

$37

thin orderbook

Closes

Aug 7, 2028

774 days

Venue

Kalshi

5 bound

30-day trend

0%50%100%-30d-3w-2w-1wtodayBoston: 21% (8 days, 4 points)Boston: 21% on 2026-06-23Chicago: 20% (8 days, 3 points)Chicago: 20% on 2026-06-24Atlanta: 14% (8 days, 6 points)Atlanta: 14% on 2026-06-24
Boston21¢Chicago20¢Atlanta14¢
Top 3 candidates by current price · 8d

Bracket family

How the bracket ladder is priced.

Each row is one outcome on the venue. Sorted by 24h volume — the heaviest book is at the top.

Analysis

Boston is currently priced as the most likely host for the 2028 Democratic National Convention at 20%, meaning traders estimate a one-in-five chance the party selects Boston over other candidates. The Democratic National Committee typically selects convention hosts 2-3 years in advance, weighing factors like arena capacity, local party infrastructure, and geographic strategy. Boston faces competition from Chicago, Denver, and Philadelphia—all priced between 10-19%—which have hosted recent conventions or represent key swing regions. The formal selection decision, expected in late 2026 or early 2027, represents the primary catalyst that will resolve this market. Until then, movement could reflect shifts in Democratic campaign priorities, venue availability changes, or local political developments in candidate cities.

  • The DNC typically announces convention host cities 18-30 months before the event; a formal decision in late 2026/early 2027 would substantially narrow uncertainty
  • Boston has hosted major political events but lacks recent convention experience compared to cities like Denver (2008) and Chicago (1996), which may factor into selection criteria
  • Geographic distribution matters to the DNC; selecting from the Northeast (Boston, Philadelphia) versus Midwest (Chicago) versus Mountain West (Denver) reflects different strategic assumptions about battleground regions
  • Arena capacity and existing infrastructure costs vary significantly—Boston's TD Garden (19,000) versus larger venues in competing cities affects feasibility and budget
  • Incumbent Democratic strength in northeastern Massachusetts versus competitive margins in swing-state locations like Philadelphia or Denver may influence the committee's venue preference

What moved the line

  • Jun 24Denver5pp1914¢ · Kalshi

Recently closed in election 2026

These markets stopped trading. Last odds and any captured outcome are shown above — full settlement detail lives at the venue.

More like this

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How we compute these odds

SimpleFunctions aggregates live prediction-market contracts from Kalshi and Polymarket. Each slug groups contracts that resolve on the same underlying event, identified by venue event_id.

For binary slugs, the headline probability is the liquidity-weighted mid-price across all bound contracts. For multi-outcome slugs (e.g. elections with 3+ candidates), the headline is the leader’s price; we never arithmetically average disjoint outcomes — that would produce a number with no real-world meaning.

Snapshots refresh every 5 minutes during market hours; daily aggregates are computed at 04:00 UTC. The 30-day sparkline is drawn from per-ticker daily means stored in market_indicator_daily; 24h delta and movement events are derived from the same source.

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