effective market breadth

The number of economically meaningful, independently tradeable propositions a venue actually supports, as distinct from the number of market tickers it exposes. On-demand combinatorial architectures can mint millions of objects from a small reused vocabulary of primitive legs, so breadth must be counted hierarchically — events, collection keys, and distinct primitives — and weighted by activity, or raw ticker count overstates it by orders of magnitude.

Cluster: Business & Platforms

Related Concepts

• combinatorial prediction markets — Prediction markets that allow participants to place bets on conditional events and Boolean combinations of base events, not just individual outcomes. By enabling richer betting vocabularies, they can elicit joint probability distributions over related events rather than only marginal probabilities.
• market structure — The organization and stratification of prediction market platforms into distinct layers — rails (settlement/execution), wrappers (distribution/user access), and product archetypes — and the competitive dynamics between them.
• parlays — Multi-leg bets combining outcomes across several events, offering higher payoffs at lower probability.
• long-tail markets — Prediction markets on niche or specialized questions that individually attract thin liquidity but collectively generate significant informational value, analogous to how long-tail content drives aggregate engagement on platforms like YouTube.

Articles about effective market breadth

• On-Demand Combinatorial Event Markets on Kalshi: Instantiation, Concentration, and Effective Market Breadth by Maksym Nechepurenko