taetaehoho

Taetaehoho analyzed liquidity rewards on Polymarket and sponsorships on Kalshi from February to May 2026, finding they only move top-of-book liquidity when daily spend exceeds 1% of existing book depth—below that, median programs show no effect. Even at higher intensities, incentive size poorly predicts actual liquidity response; pre-existing conditions like spread width matter more. The thesis: prediction market liquidity requires structural innovation beyond rewards alone.

taetaehoho compares sportsbook and prediction market pricing across identical events, finding that liquid prediction markets offer 100-300 bps better prices than sportsbooks even after accounting for 150-175 bp fees, but de-vigged sportsbook odds match prediction market prices, suggesting counterparty information and last-look advantages tighten spreads more than maker competition does. Long-tail markets on Polymarket and Kalshi suffer 10-50% spreads versus <$1,000 volume, indicating anonymity and market immaturity create depth problems sportsbooks have solved at scale.