Underdog self-certifies first contracts for in-house UDX exchange
Underdog has self-certified its first sports event contracts for its in-house exchange, UDX. The move follows its March acquisition of Aristotle Exchange, the designated contract market arm of PredictIt. UDX has set trading fees and established a market maker program ahead of a possible launch this week. The acquisition gave Underdog the ability to operate its own exchange rather than routing customers through third-party infrastructure.
Vertical integration is now the default strategy for prediction-market platforms with scale. Underdog's move strips out the white-label middlemen that its former partner Kalshi still depends on for some distribution. For smaller rivals without the capital to buy a designated contract market, the path to owning the full stack is narrowing.
Underdog must now prove it can source liquidity and hold tight spreads without the market-making relationships that established venues have built over years. The NFL season opening in weeks will test whether UDX can keep volume from bleeding back to competitors. Underdog succeeds, the template shifts from partnership to acquisition for every platform that can afford it.
Underdog joins DraftKings and Robinhood in abandoning third-party exchange infrastructure, becoming the fourth major platform this quarter to vertically integrate its trading stack rather than rely on white-label partners.