The World Cup ended ten days ago. Prediction markets didn't shrink — the money changed subject
When we wrote up the record World Cup month on July 24, we ended on the only question that mattered: do the millions of new accounts stick around once the football stops? Ten days after Spain lifted the trophy at MetLife, the first data is in — and the answer, so far, is that the money didn't leave. It changed subject.
Per Cryptopolitan's tracking of exchange data, non-sports trading volume across Kalshi and Polymarket just hit a record weekly high of $4.4 billion — an all-time peak for the category's politics, economics and culture markets, set in the first full trading week after the tournament that was supposed to be the whole story.
The numbers
| Number | What it is | Source |
|---|---|---|
| $4.4B | Record weekly non-sports volume, Kalshi + Polymarket combined | Cryptopolitan |
| $44.8B | Combined June volume, now official — up 75% from May's $25.6B | The Block |
| $31B+ | Kalshi's June notional volume, +70% month over month | The Block |
| $10.8B | Polymarket international exchange, June — an all-time monthly record | The Block |
| $3.5B | Polymarket US platform, June — more than double May's $1.77B | The Block |
| $197M | Already traded on Kalshi and Polymarket 2026 midterm election markets | NBC News |
| $223M | Kalshi's England vs Mexico match market — still the single-event sports record | The Block |
What the shift means
The midterm market is the next World Cup. $197 million on midterm markets in July — with the election still 15 months of news cycles away — is running well ahead of the equivalent point in the 2024 cycle. Election markets are the category's original product, and they resolve mechanically: exactly the kind of market that prices well. Expect the winner-market volume records set by the World Cup to be attacked by November 2026.
The sportsbook comparison just got harder to dismiss. Dollars traded on prediction markets were already running ahead of sportsbook handle during the tournament. If non-sports volume alone is printing $4.4B weeks — roughly a $230B annual run rate for the category's non-sports side if sustained, which is a big if — the AGA's argument that event contracts are simply unlicensed sports betting loses some of its cleanest framing. The category's answer to Congress is increasingly: look at the product mix.
The caveat worth keeping. One record week is a data point, not a trend. August is the quietest month on the sports calendar and the loudest on the political one; the honest test of retention is whether the combined monthly prints hold anywhere near World Cup levels through the NFL season — where the books and the exchanges will price the same games side by side. That two-market comparison is the core of the method, and this autumn will run the experiment at scale.
Frequently asked questions
- Did prediction-market volume collapse after the World Cup?
- Not in the first post-tournament data. Non-sports volume across Kalshi and Polymarket hit a record $4.4 billion weekly high, per Cryptopolitan — suggesting users acquired during the tournament are trading other markets rather than leaving.
- How big was June 2026 for prediction markets?
- The biggest month on record: roughly $44.8 billion combined across Kalshi ($31B+) and Polymarket ($10.8B international, a record, plus $3.5B US), up 75% from May — driven by the World Cup, per The Block.
- What replaces the World Cup as the volume driver?
- The 2026 US midterms are the leading candidate: $197 million has already traded on midterm markets per NBC News, 15 months before election day — with the NFL season arriving in September as the sports-side test.
Sources: Cryptopolitan (record $4.4B weekly non-sports volume), July 2026; The Block (June combined volume $44.8B, Kalshi $31B+, Polymarket $10.8B international / $3.5B US, England vs Mexico $223M record), July 2026; NBC News ($197M midterm market volume), July 2026; Sportico (World Cup prediction-market postmortem), July 2026. Figures are as reported by the cited outlets and may be revised. Analysis, not betting or investment advice.