Underdog Exchange Volume: Daily, Weekly & Monthly

Underdog Exchange (UDX) is Underdog’s own prediction market exchange, operated by Aristotle Exchange DCM, Inc. and Aristotle Exchange DCO, Inc. under CFTC oversight. DeFi Rate tracks its trading volume: the last 30 days, its share of prediction-market volume, and its daily and monthly history. They sit alongside our Kalshi, Polymarket, Polymarket US, Novig, ProphetX and Rothera volume pages, and the prediction market volume page compares every venue.

Methodology

Volume is contracts traded, each counted once at its $1 face value, with the dollars actually paid beside it, from DeFi Rate’s licensed market data, which reads Underdog Exchange’s public daily market reports. Days are UTC. The exchange publishes each day’s market report a day or two later, so its latest figures run behind Kalshi’s and Polymarket’s; each chart ends at the last complete day.

These are UDX’s own figures. Underdog also routes some trades to other exchanges; that volume isn’t counted here, so this isn’t all volume placed through Underdog. Most of UDX’s contracts are multi-leg parlays: they count in its volume (each leg costs a few cents, so in contracts at $1 they run well above the dollars paid), but their coded names aren’t listed among its most-traded markets.

Our data starts later than the exchange itself and fills in backwards; the note at the top of the page gives the first day we cover, and nothing before it is counted.