Industry Data
Other Volume
Trading outside the main topics, from each venue's own trade records: markets tagged with another topic, and markets tagged without a clear topic.
Weekly Other Prediction Market Volume by Topic
Weekly Other Prediction Market Notional Volume by Topic
Weekly Other Prediction Market Transactions by Topic
Weekly Other Prediction Market Fees by Topic
Learn more about other volume by topic
Volume is the price multiplied by the number of contracts for each trade, counting only one side. This chart covers other markets, split by topic. Every series of markets on a venue carries exactly one topic, so no trade is counted twice. Combos (parlays) are not included; they have their own tab.
Weekly Other Topics Prediction Market Volume
Weekly Other Topics Prediction Market Notional Volume
Weekly Other Topics Prediction Market Transactions
Weekly Other Topics Prediction Market Fees
Learn more about other topics volume
Volume is the price multiplied by the number of contracts for each trade, counting only one side. This chart covers Other Topics markets, by venue. Every series of markets on a venue carries exactly one topic, so no trade is counted twice. Combos (parlays) are not included; they have their own tab.
Weekly Unknown Topic Prediction Market Volume
Weekly Unknown Topic Prediction Market Notional Volume
Weekly Unknown Topic Prediction Market Transactions
Weekly Unknown Topic Prediction Market Fees
Learn more about unknown topic volume
Volume is the price multiplied by the number of contracts for each trade, counting only one side. This chart covers Unknown Topic markets, by venue. Every series of markets on a venue carries exactly one topic, so no trade is counted twice. Combos (parlays) are not included; they have their own tab.
FAQs
Common questions about prediction market data and how it’s calculated.
Are prediction markets becoming more popular?
Yes. Trading volume has grown sharply through 2026, with monthly totals across major platforms reaching into the tens of billions of dollars. Kalshi and Polymarket regularly appear in national news coverage, and have struck data and distribution partnerships with major names like Robinhood, CNBC, CNN and Google Finance.
What are the top 10 prediction markets?
Kalshi and Polymarket lead by volume, followed by platforms like Novig, ProphetX, and Underdog. The answer really depends on the features most important to you, like range of markets, fees and trading experience. See our list of prediction market apps for a detailed breakdown of each platform’s strengths.
Which prediction market app is the most accurate?
There’s no single answer. Accuracy or calibration will vary by platform, market and time period. Generally, higher liquidity and trading activity mean more stable pricing on event contracts. You can also look at platforms’ price and trade history over time to inform your opinion. Try our Kalshi and Polymarket historical data guide as an example.
Who are the biggest players in prediction markets?
Kalshi and Polymarket are the two largest platforms by volume and user activity, together accounting for the large majority of industry-wide trading. The gap between the two shifts week to week depending on the sports calendar, news cycle and major events.
Contact us
Want to request data or get download access?
Whether you need numbers for your own work, want a chart added to this page or need the data behind it, send me a message on Telegram or X, or email the team at [email protected].
dash
Industry Data Lead
dash has 6 years of experience as a data scientist and has created the most cited Prediction Market dashboards.