Eilers & Krejcik Gaming

PMI Databook

Daily cross-platform prediction market data and competitive intelligence

Market scale, exchange momentum, sports and league activity, and the competitive structure of U.S. prediction markets—all on one normalized dataset spanning 11 tracked U.S. exchanges.

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Updated daily•11 U.S. exchanges•Canonical definitions•173 leagues with traded volume•NFL 22.6% of labeled sports CV•MLB 16.5% of labeled sports CV•NCAA Football 15.6% of labeled sports CV•ATP 11.4% of labeled sports CV•WTA 7.3% of labeled sports CV•Combo 55.2% of Total CV•Kalshi 78.3% CV share•Proprietary EKG analytics•Exportable data•Data as of Oct 5, 2026

The U.S. market, right now

EKG · PMI · 11 tracked U.S. exchanges · 30 days · as of Oct 5, 2026
Contract Volume (CV), last 30 days
84.7B
+73.5%vs prior 30 days
Up 19.4x on the same 30 days a year earlier, measured on the 3 exchanges live in both windows.
CV Market Share Leader
Kalshi · 78.3%
-7.3 ptsvs prior 30 days
Polymarket U.S. is next at 11.8%, then DKeX at 2.8%. 11 exchanges recorded volume in the window.
Sports share of CV
29.2%
-9.2 ptsvs prior 30 days
173 leagues carried traded volume in the window, led by NFL at 22.6% of labeled sports Contract Volume.
Market scale
Monthly Contract Volume, in billions of contracts · Oct '26 through Oct 5
Contract Volume across 5 days in Oct '26 ran 21.9x the same days a year earlier, and 11 exchanges recorded volume vs. 3.
EKG · PMI · 11 tracked U.S. exchanges
Emerging category
Combo share of Total Contract Volume, monthly · Oct '26 through Oct 5
Multi-leg contracts reached 62.7% of U.S. Contract Volume in Oct '26, from 0.7% the same days a year earlier.
EKG · PMI · 8 tracked U.S. exchanges

Football in focus

Growth, new entrants, and exchange concentration within football markets.

Football volume by exchange
Oct 1–5, 2025 against Oct 1–5, 2026 · Contract Volume, football-labeled
Oct 1–5, 2025Oct 1–5, 2026
Football Contract Volume across 5 days in Oct '26 ran 3.9x the same days a year earlier, carried by 7 exchanges vs. 1. Limited to exchanges whose data classifies to sport and league.
EKG · PMI · 7 tracked U.S. exchanges
Football concentration by exchange
Football as a share of each exchange's Sports Contract Volume, last 30 days through Oct 5
How football-weighted an exchange is varies widely: football is 66.7% of DKeX's sports Contract Volume against 33.8% of Kalshi's. Each bar is measured against that exchange's own sports volume, so it stands alone.
EKG · PMI · 7 tracked U.S. exchanges

Tracked exchanges

All major U.S. exchanges tracked.

KalshiPolymarketNadexRotheraCME GroupProphetXForecastExDKeXUnderdogGeminiNovig

From market overview to underlying analysis

Four live tabs, one normalized dataset, updated daily.

The Briefing
Know what matters.
Ten curated views of market scale and mix, exchange positioning, emerging entrants, sports and league dynamics, and EKG proprietary analytics.
Velocity Monitor
See what's changing.
Track exchange share, growth, new entrants, market mix, and competitive momentum.
Sports Atlas
Map the sports market.
Compare exchange sports and league mix, breadth, concentration, seasonality, combo exposure, and long-tail positioning.
Methodology & Coverage
Understand the foundation.
Metric definitions, source basis by exchange, normalization, coverage, and documented limitations.

Why the Databook is different

Made comparable across exchanges
Common definitions normalize exchange-native reporting into a single cross-platform dataset, with Contract Volume and Execution Volume treated consistently across exchanges.
Built for gaming analysis
A unified sport and league taxonomy supports like-for-like competitive analysis, while proprietary EKG models translate prediction market activity into gaming-relevant measures and benchmarks.
Transparent by design
Reported, derived, and estimated figures remain clearly distinguished, with source basis, coverage, assumptions, and material limitations documented alongside the data.

Built by Eilers & Krejcik Gaming

PMI Databook is built on more than 14 years of EKG gaming market research, operator benchmarking, product testing, and proprietary industry datasets. EKG is an independent gaming research and advisory firm headquartered in Newport Beach, California, serving operators, suppliers, institutional investors, and other industry stakeholders. The Databook brings that experience into a single platform for measuring and analyzing prediction markets.

EKG at a glance
14+ years
Gaming market research
Independent
Research & advisory
Institutional client base
Operators · suppliers · investors
See the Databook in action

Walk through EKG's daily prediction market data and competitive intelligence platform with the team that builds it, or talk to sales about coverage and pricing.

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Eilers & Krejcik Gaming
Source: CME, DKeX, ForecastEX, Gemini, Kalshi, Nadex, Novig, Polymarket U.S., ProphetX, Rothera, and Underdogdata · Eilers & Krejcik Gaming research and estimates