Prediction markets break records every quarter. Each time it happens, the industry and outside observers ask the same question: is it a seasonal spike, or has something in the underlying model changed permanently?
The week of April 6–11 delivers the clearest answer yet. The combined weekly volume reached $6.5 billion across tracked platforms, according to DeFi Rate’s dashboard. That number surpasses the previous record of $5.94 billion, set during March Madness just over a month ago.
Yet volume is almost a secondary detail. What matters is what generated it. Kalshi posted $3.54 billion, with 21.8% weekly growth, anchored in sustained activity on the Masters Tournament and professional sports. Polymarket moved $2.48 billion, with 25.5% growth, driven by US-Iran conflict markets and long-term election positioning for 2028. These are distinct categories. The users are distinct. The time horizons don’t overlap. And both platforms execute both simultaneously at scale. That marks the shift.
The baseline has moved
For most of prediction markets’ history, volume was governed by events. It rose during elections. It collapsed after. The 2024 US election cycle produced extraordinary numbers. When it ended, skeptics insisted the sector would revert to normal levels. The data proves otherwise.
Kalshi reached $13.07 billion in March. Polymarket hit $10.57 billion. These are monthly baselines, not peak weeks, in a period that is ostensibly low in events between election cycles. Activity didn’t collapse. It simply normalized to a level far higher than what existed two years ago.
On Polymarket, average transaction size grew 27.5% week-over-week, reaching $110.77 per trade. Transaction count remained flat. The volume gain came from larger positions, not more participants. That signals sophisticated capital using these platforms as tools for macroeconomic positioning, not retail betting.
On Kalshi, average transaction size reached approximately $160, a 10% increase. It reflected high-conviction positioning in sports, cryptocurrency, and politics. The contrast between platforms is revealing: Kalshi processed 22.2 million transactions and Polymarket 22.3 million, yet Kalshi generated $1 billion more in volume. Regulated markets anchored in sports attract bigger tickets than crypto-political markets onchain.
Geopolitical permanence
The US-Iran conflict markets illustrate the new reach. The “US forces enter Iran by…?” market channeled $367 million in total volume since January. The “US-Iran ceasefire by…?” market drew $280 million from late February onward. Bloomberg reported that combined US-Iran conflict markets moved more than $170 million through Polymarket alone. That places it among the largest geopolitical wagers in the short history of this category.
What matters isn’t the volume. It’s the durability. Those markets sustained activity across weeks of escalating rhetoric, ceasefire negotiations, and reversals. It wasn’t a single crystallizing event. It was continuous flows of traders revaluing probabilities in real time.
The Trump category on Polymarket surged 141% week-over-week to $488.3 million. Combined with general politics at $354.2 million, the Trump-Politics complex totaled $842.5 million, representing 34% of all Polymarket volume for the week. This happened without an election event. It happened because traders use geopolitical prediction markets as information tools, not just betting products.
When a user base acts that way, the addressable market expands far beyond election cycles. It expands into competitive intelligence, geopolitical risk hedging, and medium-term trend analysis.
The institutional scaffolding
The infrastructure supporting this changed too. In October 2025, ICE/NYSE, the parent company of the New York Stock Exchange, announced a strategic investment of up to $2 billion in Polymarket at an $8 billion valuation. That kind of capital doesn’t flow toward experiments. It flows toward infrastructure that works.
Bank of America estimated that Kalshi controls approximately 89% of the regulated prediction market in the United States. That concentration suggests the CFTC-regulated path won, at least for now. The same BofA report estimated that sports event contracts could eventually generate $1.1 trillion in annual volume, translating to roughly $10 billion in annualized revenue at typical fee levels.
The compliance map remains messy. Arizona filed criminal charges against Kalshi in March. Nevada regulators sued. The Trump administration sued multiple states over their efforts to regulate prediction markets. But the direction of travel, toward federal preemption and CFTC oversight, appears set, even if contested. Regulators aren’t stopping this. They’re deciding how to regulate it.
The open question
The Guardian reported that newly created accounts placed well-timed bets on the US-Iran ceasefire market, generating hundreds of thousands of dollars in profits. One wallet turned roughly $72,000 into $200,000 in hours. The pattern of newly created accounts with precisely timed positions appeared before on Polymarket, even before Nicolás Maduro’s capture in January. The platform has not publicly addressed specifics.
For institutional participants considering prediction markets as positioning tools, information integrity is a live concern. For the industry, it’s a governance challenge that grows with scale.
The $6.5 billion week is real. The structural question is whether prediction markets have permanently expanded their addressable market. Early evidence says yes. The infrastructure is catching up.
