TheBlock
The 2026 World Cup is doing for prediction markets what the 2024 elections did for Polymarket: turbocharging retail flow. Polymarket volume jumped 300% week-over-week as tournament markets pulled in a fresh wave of bettors pricing every match, goal, and group-stage upset. The surge lands weeks after the platform processed hundreds of millions in election-related volume and underscores how event-driven catalysts now move the category more than crypto-native speculation.
Kalshi, the CFTC-regulated US exchange, hit its own milestone in parallel: aggregated open interest reached $1.16 billion last week, the first time the venue crossed the $1B mark. The simultaneous breakouts on a regulated US venue and an offshore crypto-native platform suggest the prediction-market category is no longer dependent on a single catalyst, with sports, politics, and macro price markets each capable of delivering liquidity surges on their own.
Why it matters
Open interest above $1B on a federally regulated US venue reframes prediction markets as a durable asset class rather than an election-cycle novelty. The category has now produced billion-dollar milestones on two structurally different venues inside the same trading week.
Market impact
For liquidity providers and market makers, the read is that event-contract books are now deep enough to support institutional-sized flow. For incumbents, the World Cup-driven surge is a test of whether sports markets can sustain the user acquisition gains once the tournament ends, or whether the volume reverts to a smaller post-event baseline.
Frequently asked questions
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How much did Polymarket's volume rise during the World Cup?
Polymarket's trading volume jumped 300% week-over-week as World Cup tournament markets pulled in a fresh wave of bettors pricing matches, goals, and group-stage outcomes.
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What record did Kalshi set in the same week?
Kalshi's aggregated open interest reached $1.16 billion last week, the first time the CFTC-regulated US prediction venue crossed the $1 billion mark.
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Why is the simultaneous Polymarket and Kalshi surge significant?
Both venues hit milestones the same week on structurally different rails (offshore crypto-native and US-regulated), suggesting the prediction-market category is no longer dependent on a single catalyst like elections.
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Is Kalshi regulated in the United States?
Yes. Kalshi operates as a CFTC-regulated designated contract market in the US, which is structurally distinct from offshore platforms like Polymarket.
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Can the World Cup-driven volume be sustained after the tournament?
That is the open question. The surge tests whether sports markets can keep the new user base engaged once the final whistle blows, or whether volume reverts to a smaller post-event baseline.
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