Wintermute is moving into prediction markets as institutional market makers race to dominate event contracts that already clear more than $20 billion a month.
Summary
- Wintermute begins two way market making on major prediction platforms
- Monthly prediction market volume above $20 billion as lifetime flows top $150 billion
- Move follows institutional push into Polymarket and Kalshi style event contracts
Wintermute, one of crypto’s largest quantitative market makers, has begun providing continuous two way liquidity on several “leading” prediction market platforms, extending its infrastructure into event contracts that straddle both digital assets and traditional macro themes, according to The Block.
The firm told The Block it has already been streaming bilateral buy and sell quotes across multiple venues, where aggregate monthly prediction market trading volume has climbed past $20 billion in 2026, even as liquidity remains “early stage” by institutional standards.
Wintermute itself executes more than $3.5 trillion in annual trading volume across spot, derivatives and DeFi markets, and the new business line is pitched as a way to extend that cross asset machinery into event contracts ranging from elections and macro data prints to crypto specific flows.
Wintermute’s thesis on event contracts
Jake Ostrovskis, Wintermute’s head of OTC trading, argued that the underlying demand in prediction markets already resembles traditional asset classes, with structurally similar flows but thinner books and wider spreads than blue chip futures or options.
“There is clear demand for these markets, but liquidity is still insufficient,” he told The Block, saying Wintermute’s goal is to post continuous bilateral quotes that tighten spreads, deepen books and make the implied probabilities more usable for traders and institutions.
Ostrovskis added that “tighter spreads and greater trading capacity” should improve the quality of probability signals coming out of venues like Polymarket and Kalshi, turning them into data sources that more closely resemble established derivatives markets rather than exotic side bets.
That narrative tracks with Wintermute Ventures’ broader view that “everything becomes tradeable” as crypto rails turn prediction markets into financial tooling rather than niche gambling, a theme the firm laid out in a 2026 outlook covered by Yahoo Finance.
Polymarket, Kalshi and institutional liquidity
Wintermute is not the first big trading shop to see an opening in event markets.
The Block reports that firms including Jump Trading and Galaxy Digital already provide liquidity to event contracts, as lifetime trading volume on Polymarket and Kalshi has now crossed $150 billion, based on data cited by CoinMarketCap from The Block’s prediction market trackers.
That $150 billion figure covers all historical trades on both platforms, while their combined monthly turnover has cooled slightly from a record run of growth, according to the same report.
On the crypto side, ultra short event contracts tied to bitcoin and ether already dominate flows on Polymarket and Kalshi, with five to 15 minute “up down” bets on BTC and ETH now accounting for more than half of their crypto volume, as previously reported by crypto.
Regulatory risk is mounting alongside that growth: Spain this month ordered ISP level blocks on both Polymarket and Kalshi over unlicensed gambling concerns, the fifth country to move against them in 2026, as detailed in a recent crypto investigation.
Wintermute’s move effectively treats those markets as another derivatives frontier, with stablecoin settlement, on chain clearing and automated risk management that look increasingly like the institutional DeFi stacks the firm is already building through products such as its new Armitage vault platform, reported earlier by Bitcoin.
If Armitage is Wintermute’s bet that DeFi lending should run on institutional style vaults, the push into prediction markets is its wager that event contracts will mature into a derivatives like infrastructure layer rather than remaining a regulatory gray zone casino.
