Launched in 2014 and operated by New Zealand's Victoria University of Wellington, PredictIt is the academically-affiliated veteran of U.S. political prediction markets. For a decade it has been a trusted, transparent place to trade on elections and policy outcomes.
Its defining constraints are deliberate: strict position-size caps and a narrow, politics-only focus that keep liquidity thinner than the new generation of exchanges. For students of elections and forecasting, though, its long track record and clear resolution rules remain valuable.