Research suggests that a small group of traders is dominating prediction markets, with an even smaller group reaping most of the financial rewards. According to a report by blockchain analytics firm Solidus Labs, profit concentration on Polymarket is extremely skewed, with less than 1% of wallets accounting for roughly half of all gains in key markets. Between December 2025 and February 2026, a mere 0.55% of profitable maker wallets and 0.26% of winning taker wallets captured approximately 50% of gains, translating to around $8 million out of $16 million in profits.
This data reinforces previous academic findings that a small minority of traders drives price discovery, with about 3% of Polymarket traders responsible for most price movements. The report highlights that this concentration of profits does not necessarily imply wrongdoing, but rather that some traders have significant advantages, including greater sophistication, better capitalization, and faster access to information. However, the scale of the imbalance suggests a structural divide between a small group of traders operating with substantial advantages and the broader base of participants.
The report also identifies signs of wash trading, with around 15% of volume in some markets exhibiting patterns consistent with self-trading or economically neutral positions. This phenomenon is unique to binary prediction markets and has no equivalent in traditional finance. While some of this volume may be driven by incentive farming rather than pure manipulation, it is essential to approach these findings with a critical perspective, considering the potential biases and motivations of the report's authors.