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Prediction Market Report: March 2026

Published March 31, 2026 — Data sourced from PredScope's tracking of 1,500+ active Polymarket events. Updated end of month.

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Market Snapshot: March 2026

March 2026 shattered every prediction market record. Industry-wide monthly trading volume hit $23.89 billion — a 1,107% year-over-year increase from $1.98 billion in March 2025. Total transactions reached 192 million (an all-time record), and monthly active users grew to 865,411, up 118% from 396,642 a year ago.

On Polymarket alone, daily trading volume exceeded $185 million, driven by three major catalysts: the 2026 FIFA World Cup (build-up betting months ahead of the June kick-off), the intensifying 2028 US presidential primary season, and escalating US-Iran tensions.

The industry has grown by more than 20x since early 2024, when Polymarket processed roughly $5-10M daily. The CFTC's approval of Polymarket for US markets in late 2025, combined with entries from Robinhood, FanDuel Predicts, DraftKings, and Fanatics, brought mainstream adoption. There are now 13 federally regulated prediction market platforms available to US users.

Volume by Category

Sports dominated March volume at 38%, followed by a mix of politics, geopolitics, and crypto:

Notable shift: Sports overtook Politics as the #1 category for the first time since mid-2024. The FIFA World Cup qualifying rounds and NBA playoffs drove massive daily volumes. Meanwhile, geopolitics (US-Iran tensions) emerged as a significant category with 13% of total volume — a category that barely existed before 2025.

Top 10 Markets by Volume

Sports: FIFA World Cup Dominates

The 2026 FIFA World Cup — to be held across the US, Mexico, and Canada starting June 11 — is already the single largest prediction market in history by volume. With $11.1M in daily volume months before the tournament, it's on track to become the most traded event in prediction market history.

NBA games continued to drive steady daily volume, with individual matchups regularly exceeding $5M. The integration of prediction markets into sports betting culture accelerated after Robinhood launched its prediction market feature in late 2025, bringing millions of existing stock traders into event contracts.

Track live sports odds on PredScope Sports or explore which platforms offer sports prediction markets.

Politics: 2028 Race Heating Up Early

Three separate 2028 presidential markets combine for over $17.6M in daily volume — and the election is 2.5 years away. Key dynamics:

• Democratic Nominee ($8.4M/day) — the most-traded political market, reflecting the wide-open primary field
• Republican Nominee ($5.2M/day) — significant volume despite perceived frontrunner status
• General Election Winner ($4.0M/day) — already drawing substantial interest for 2028

The 2028 election markets are drawing volume levels comparable to the 2024 election markets in early 2024 — but they're doing it 2 years earlier. This suggests prediction markets are becoming the default way to track election probabilities, replacing traditional polling for many analysts.

See live election odds and our election betting odds guide for full analysis.

Geopolitics: Iran Tensions Drive New Category

US-Iran markets collectively exceeded $11.8M in daily volume in late March 2026, with traders pricing military action and ceasefire probabilities in real-time. This represents a new category for prediction markets — before 2025, geopolitical events rarely generated more than $1M/day in volume.

Notable markets:

• "US Forces Enter Iran By...?" — $7.8M/day, with traders pricing date-based escalation scenarios
• "US-Iran Ceasefire By...?" — $4.0M/day, reflecting hope for diplomatic resolution

These markets have proven remarkably responsive to breaking news, with odds shifting within minutes of diplomatic statements or military movements. Several journalists and analysts now cite Polymarket odds as a leading indicator of geopolitical risk.

Crypto: Steady but No Longer Dominant

Crypto markets accounted for 12% of total volume ($21.5M/day), with 53 active markets tracking price predictions for Bitcoin, Ethereum, Solana, and other assets. While still significant, crypto's share has declined from over 50% in 2021-2022 as sports and politics have grown faster.

The crypto prediction markets guide covers how to trade crypto price predictions on Polymarket and Kalshi.

Key Trends for April 2026

1. FIFA World Cup build-up — expect volume to accelerate as the June 11 start approaches. Team qualifications, group draws, and pre-tournament friendlies will each trigger volume spikes.
2. 2028 primary season — as candidates declare, expect the Democratic and Republican nominee markets to see increasing volume and more granular per-candidate markets.
3. Tariff escalation — US trade policy markets are emerging, with crude oil and commodity contracts tied to tariff announcements gaining traction.
4. Platform expansion — FanDuel Predicts launched in March 2026 and is expected to expand market offerings. Robinhood continues adding new event categories. Competition should drive innovation and lower costs.
5. Institutional adoption — Polymarket's partnership with Dow Jones and NYSE's $600M investment signal that prediction markets are entering the mainstream financial infrastructure.

Methodology

This report is based on data collected by PredScope from the Polymarket Gamma API. Volume figures represent 24-hour trading volume at time of publication. Categories are inferred from market titles and descriptions using PredScope's classification system. All data is verifiable via Polymarket's public API and on-chain transaction records on the Polygon blockchain.

PredScope tracks 1,500+ active prediction market events with data refreshed every 10 minutes. Historical data is available via our statistics page and public API.

Note: PredScope is an independent analytics platform. We are not affiliated with Polymarket, Kalshi, or any prediction market platform. Some links to platforms include referral codes. See our about page for full disclosure.

Related Resources

• Live Prediction Market Statistics — real-time volume, distributions, and aggregate data
• Best Prediction Markets 2026 — all platforms ranked and compared
• Polymarket Review 2026 — full review of the largest platform
• Kalshi Review 2026 — CFTC-regulated alternative review
• How to Trade on Polymarket — step-by-step beginner guide
• Prediction Market Accuracy — how accurate are the odds?
• Election Betting Odds 2026 — live election odds and analysis
• Prediction Market Arbitrage — cross-platform trading strategies
• Polymarket Alternatives — other platforms to consider
• What Are Prediction Markets? — introduction for beginners