Kalshi

Overview

US-regulated prediction-markets platform. Per guy-barkat in 2026-05-27-directions-vertical-pivot-and-prediction-markets: sports betting is now the largest volume category on Kalshi. Cited alongside polymarket as the other disruptive entrant putting pressure on traditional sports bookmakers.

Relationships

• Direct competitive threat to winner-toto and other state-protected bookmakers.
• Reference architecture for prediction-markets-regulatory-play — country-level regulators (Spain, per the meeting) are starting to block Kalshi and polymarket to protect local incumbents.

Notes

• Same mechanism class as polymarket (peer-to-peer order book, no house) — see Polymarket notes for the odds-edge argument and the bundle/parlay friction.
• Recent inflection: Spain reportedly blocked both Kalshi and polymarket just before 2026-05-27. Cited as evidence the regulatory-arbitrage trend is accelerating, not theoretical.

Mentioned in

• 2026-05-27-directions-vertical-pivot-and-prediction-markets — discussed as the US/regulated disruptor; sports volume cited as load-bearing.