News categoryVolume Report

Kalshi reached $19.03 billion in weekly contract volume Oct. 5-11. Polymarket US Trade Volume nearly tripled in six weeks.

Kalshi volume rose 17.28% to $18.37 billion for Sept. 28-Oct. 4. Polymarket US fell 4.41% to $2.71 billion, while Polymarket dollar volume increased 6.26% to $519.01 million.

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.

Kalshi set a new 2026 high with $15.27 billion in weekly contract volume, and also recorded its first $3 billion day.

NFL football, US Open tennis and esports fueled a prediction-market surge, pushing Kalshi and Polymarket Global to $14.1B in weekly volume as Kalshi captured a record 92.0% share.

NFL prediction market volume reached at least $1.035 billion from Sept. 7-13, with Kalshi accounting for $983.36 million as regular-season trading spread across the Week 1 slate.

Prediction markets moved to near-certainty on a September Fed rate hike after core inflation came in hotter than expected, and Polymarket US listed contracts on the meeting.

The first game of the 2026 regular season nearly quadrupled the Kalshi volume generated by last year’s opener, pushing reported volume across three operators above $111 million.

Prediction markets hit $12.9B in weekly volume as Kalshi takes 92% share, while the NFL season could drive billions more in prediction market trading.

DeFi Rate forecasts Kalshi's NFL trading volume for the season will far exceed last year's, modeling how volume builds week by week rather than extending current growth.

Prediction markets surged to $11.26B weekly contracts as Kalshi set a record, grabbed 90.4% market share, and powered growth through sports and combo markets.

Prediction markets surged to $3.36B in weekly volume, with sports dominating 76.5% of trading across Kalshi and Polymarket Global.

NFL volume across Kalshi, Polymarket Global and Polymarket US hit $167.8 million, up 324.4% from week prior.

Prediction markets rebound as trading tops $10 billion, with Kalshi leading the surge and a growth in political markets driving activity.

Prediction markets cool after the World Cup, but Kalshi gains more share as sports and Fed markets drive trading.

World Cup trading was the biggest event in Kalshi's history and drove new daily, weekly and monthly records. DeFi Rate breaks down the markets and matches that drew the most.

With one day still to trade, Kalshi had already beaten its weekly volume record, driven by World Cup matches, and was on track for its first eight-billion-dollar week.

Kalshi passed a hundred billion dollars in lifetime volume and had its first billion-dollar days as World Cup and NBA and NHL finals trading set a weekly record.

Kalshi set its ninth straight monthly volume record in May as Polymarket fell to its lowest month since January, while the World Cup gave Polymarket US its biggest week.

DeFi Rate projects the World Cup will draw billions in US prediction market volume, most of it on Kalshi, with the tournament winner contract outpacing March Madness.