Polymarket study: only 3.5% of traders drive most profits, raising insider-risk concerns
A new study from London Business School and Yale finds Polymarket is not powered by “collective wisdom.” Using Polymarket trading data from 2023–2025, the researchers simulated each trader’s behavior 10,000 times to separate skill from randomness.
Key result: only about 3.5% of Polymarket accounts generate most profits. Market makers and more experienced traders capture over 30% of total gains, while the broader user base mainly provides liquidity and volume. The paper also finds that a large share of traders are “lucky winners” or “unlucky losers,” implying that observed returns often reflect chance rather than persistent informational edge.
Newer related analysis adds an even tighter “consistent edge” filter: only 0.015% of traders reached at least $5,000 profit across four consecutive months (Apr 2024–Apr 2026) on Polymarket.
Regulatory angle: the study highlights insider-trading vulnerability due to real-world event reliance and pseudonymous participation with limited oversight.
For crypto traders, the trading takeaway is that Polymarket pricing may reflect a small informed minority. That can affect how you size risk and expectations on prediction-market venues—especially during high-attention events.
Neutral
This news is about trading mechanics and profit concentration on Polymarket (a prediction-market venue), not about a specific cryptoasset’s fundamentals. While it may influence how traders approach liquidity and edge on Polymarket—potentially affecting participation patterns—the study does not provide evidence of direct price impact on any listed crypto. Therefore, the likely market impact on crypto prices is neutral.
Short term: traders may reassess whether returns on Polymarket are skill- or luck-driven, which can shift risk management and position sizing on prediction markets.
Long term: if the findings encourage more scrutiny around insider-risk controls and market integrity, participation could become more selective, but that still does not translate into a clear bullish or bearish signal for any specific cryptocurrency price.