Kalshi Posts $1.8 Billion Weekly Volume as Prediction Markets Top $2.3 Billion
Prediction market quantity topped $2.3 billion throughout Kalshi and Polymarket over the previous seven days.
Kalshi posted $1.8 billion in rolling weekly quantity, up 15.2% from the prior week. Polymarket recorded $511 million, a 19.7% improve. Kalshi’s share of the market stands at 78%.
Data from DeFi Rate predictions tracker. Weekly figures replicate seven-day rolling quantity as of December 8, 2025 at 12:31 AM PST
NFL continues to drive quantity for Kalshi
NFL video games once more led Kalshi’s weekly quantity. Kansas City at Dallas was the highest market at $47.1 million, adopted by Cincinnati at Baltimore ($43.7 million) and Green Bay at Detroit ($33.0 million). Indiana at Ohio State ($32.4 million) rounded out the highest 4 as the week’s largest school soccer market. All 4 contracts have settled—Dallas, Cincinnati, Green Bay, and Indiana received.
Polymarket’s prime sports activities markets are futures. The 2026 NBA Champion contract has drawn $14.7 million in quantity, with Oklahoma City main at 42% odds. The UEFA Champions League Winner market sits at $12.1 million, with Arsenal (19%) forward of Bayern Munich (18%).
The upcoming Fed determination closes Dec. 10. Traders have positioned $111 million on the contract—$87.5 million on Polymarket, $23.4 million on Kalshi. Odds on a 25 foundation level lower sit at 91-93% throughout each platforms.
Robinhood accounts for a big share of Kalshi’s quantity. In the corporate’s Q3 2025 earnings call, incoming CFO Shiv Verma stated “a really massive chunk of Kalshi’s quantity is definitely coming from Robinhood.”
The brokerage traded 2.5 billion prediction market contracts in October.
Other companions providing Kalshi contracts embrace Webull (hourly crypto and Fed occasions), which launched in February, and PrizePicks (sports activities and tradition picks in 38 states), which launched November 14.
Jupiter is beta testing tokenized Kalshi contracts on Solana. Coinbase is constructing a prediction market interface utilizing Kalshi infrastructure.
Polymarket obtained CFTC approval for intermediated buying and selling on November 25, permitting brokerages and FCMs to record its contracts. The platform partnered with PrizePicks the identical week as Kalshi, however that integration awaits Polymarket’s full U.S. launch. MetaMask rolled out Polymarket predictions final week.
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