According to data from Artemis, Polymarket's spot DEX saw more trades than Kalshi for nine consecutive days between February 12th and February 20th. On February 20th, Polymarket's spot DEX had 3.3 million trades, while Kalshi's had 2.3 million. During the same period, Kalshi's spot trading volume was $330 million, while Polymarket's was nearly $260 million.