Prediction Markets Cross $20 Billion in Weekly Trading Volume for the First Time

Prediction Markets Log $20.4B Week as Kalshi Takes 77%

Prediction markets posted $20.4 billion in cumulative weekly trading volume, the first time weekly volume has crossed $20 billion, per Artemis data, surpassing the previous highs set during the FIFA World Cup in June and July 2026. Data from Artemis shows the record arrived as the American football season and early positioning for the November 3 midterm elections drove activity, while the Federal Reserve's September rate decision had contributed…

Prediction Market Volume Hits $19.46B

Kalshi, Polymarket US and Polymarket International combined for approximately $19.46 billion in trading volume from Sept. 21-27, up 3.9% from $18.72 billion the week before, according to a DeFi Rate analysis of the three venues. Polymarket US supplied most of the incremental growth, pushing its share of the combined total from 12.5% to 14.6%. Kalshi still ran away with the week in absolute terms. Its volume rose 2.6% to a record $15.66 billion, …

Prediction Markets Cross $20 Billion in Weekly Trading Volume for the First Time

Prediction markets have set another record this past week by drawing in a cumulative total of $20.4 billion in trading volume. Data from Artemis shows that this is the first time weekly volume has gone past the $20 billion mark. The week before saw volume come in just under that level at $19.8 billion. The...

Prediction Market Volume Nears $20B as Polymarket US Takes Bigger Share

Combined volume across Kalshi and the two Polymarket venues reached $19.46 billion, with Polymarket US combinations accounting for nearly all of its weekly growth.