Predictions Market: 0.1% of Users Capture 67% of Profits

Who will become president, which team will win a soccer match, or what word a celebrity will say on TV—people bet money on these outcomes. Prediction markets display odds instead of payouts and feature buy/sell order screens, with participants called investors or traders. A recent WSJ analysis from May 2024 shows that among approximately 1.6 million Polymarket accounts active since November 2022, just 0.1% captured 67% of total profits, with fewer than 2,000 accounts earning roughly $500 million.

While the market is expanding rapidly—Robinhood reported 4.7 billion event contracts traded in August and Coinbase saw a 106% quarterly increase in prediction market volume—the data reveals that success is concentrated among a tiny minority. This doesn’t mean most users lost money, but it does show profits are highly skewed.

Users are drawn to prediction markets because they’re familiar with sports and politics, unlike complex financial statements. However, correctly predicting an outcome isn’t enough—traders must also anticipate market pricing more accurately than others. For example, buying a contract for $0.80 that pays $1.00 if correct means losing $0.80 on a wrong call but gaining only $0.20 on a win. Even with 80% accuracy over five bets, one loss wipes out profits after fees.

Market makers like Kalshi, which recently brought in Susquehanna as its first dedicated market-making firm, help set bid/ask prices and improve liquidity. While their role is legitimate, individual traders must recognize that professionals analyze data, spread risk across multiple trades, and operate with superior resources—unlike casual bettors focused on single events.

Platforms should report not just trading volume but user profitability metrics: how many accounts profit versus lose, net gains after fees, and where losses concentrate. Transparency about win rates, fee structures, and conflict-of-interest management is crucial for trust. Prediction markets can offer value by aggregating public opinion on future events or helping businesses hedge risks—but they shouldn’t be conflated with productive financial instruments like stocks, which generate real economic growth.