TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
#Volume
Analysis, predictions, and breakdowns from across the markets.
How to Cite Prediction Market Data in Research (Without Getting the Stats Wrong)
A prediction market price is a timestamped snapshot of belief, not a probability with a confidence interval.
Jared Polites · Sep 28
How to Track Prediction Market Prices Without Refreshing Five Tabs
Tracking a market means watching last price, mid price, volume, and timestamp together, across every platform that lists it. Here's what each of the five major platforms actually shows you.
Jared Polites · Sep 26
Is Polymarket Legit? What the Data and the Regulatory Record Actually Show (2026)
Yes, Polymarket is a legitimate, well-funded exchange that pays out onchain. Here's the full record, good and bad.
Jared Polites · Sep 25
Favorite-Longshot Bias in Prediction Markets: Why Longshots Are Overpriced
Longshot contracts routinely cost more than their real odds justify. Here's the order-book mechanic that inflates them, and how to correct for it.
Jared Polites · Sep 22
Correlated Prediction Markets: How Related Contracts Constrain Each Other's Prices
A primary contract at 40 cents and a general contract at 45 cents for the same candidate can't both be right. The arithmetic behind correlated contracts on five prediction market platforms.
Jared Polites · Sep 15
Prediction Market Wash Trading: How to Spot Fake Volume
Wash trading is a trader taking both sides of a contract to fake volume with zero real risk. Here's how it works, why on-chain platforms are more exposed, and the signals that give it away.
Jared Polites · Sep 12
Prediction Market Liquidity Comparison: Why Some Platforms Are Structurally Deeper
Every platform can quote a price. Not all of them can back it once real size hits the book. Here's what actually determines whether liquidity holds, platform by platform.
Jared Polites · Sep 11
Prediction Market Overround: Why the Odds Don't Add Up to 100%
A three-candidate market pricing at 105 cents isn't broken. Here's what that extra 5 cents actually means and why sportsbook vig is a different animal.
Jared Polites · Sep 6
What Is a Prediction Market Whale? How to Spot Large Positions and Read Smart Money Claims
Position size alone proves nothing. Here's how to separate real information from ordinary risk-taking and wash trading, and why some platforms let you check a wallet's history while others don't.
Jared Polites · Sep 4
What Does Prediction Market Volume Actually Mean?
Volume is the total traded over time. Open interest is what's still at stake right now. Liquidity is what you can trade this instant, and most headlines quietly blur all three into one number.
Jared Polites · Aug 5