Prediction markets post record weekly crypto volume on Kalshi and Polymarket

what happened

Crypto-linked contracts on Kalshi and Polymarket hit a new high, with about $2.7 billion traded in one week in mid-October 2026, according to Crypto Briefing. Bitcoin price bets accounted for most of that volume, lifting crypto to second place among categories on both platforms, behind only sports.

The driver was a wave of short-duration products. Kalshi's 15-minute up-or-down Bitcoin contract stands out: its Bitcoin contracts alone generated more than $2 billion in a single week. Polymarket's US arm also logged early 15-minute Bitcoin activity of roughly $92 million to $101 million during its first full week.

The surge sits within a broader run of records at Kalshi. Its contract volume peaked at $19.03 billion in the week of October 5 to 11, and daily volume often stayed between $3.9 billion and $4.4 billion. Meanwhile, spot crypto trading volumes have been falling, and Coinbase and other platforms are moving into prediction markets.

why it matters

For markets, the figures point to demand for quick, speculative bets on Bitcoin rather than long-term holding. These are notional face values, not actual cash flows, so they measure activity rather than money at risk. The shift of attention toward event contracts is worth weighing when assessing spot trading volumes at crypto exchanges.

market impact

Bitcoin and spot crypto exchanges: some activity is moving to short event contracts, which weighs on spot volumes

tags

instruments