Over $600 Million in Polymarket Election Trades Took Place After Races Ended

Wash trading on Polymarket has been confirmed, with nearly all volume on certain markets appearing artificial.

Over $600 million in trades occurred on Polymarket's election prediction markets, primarily focused on contracts for losing candidates in Ethiopian and Romanian elections. This volume significantly exceeded typical prediction market activity, where trading usually aligns with the likelihood of an outcome. In the Ethiopian election, only $173,000 was traded on the actual winner, Abiy Ahmed, while over $41 million was traded on his chief of staff. Experts, including former Polymarket trader Chris Park and economics professor Rajiv Sethi, suspect this activity is a form of volume manipulation, specifically wash trading or 'activity farming,' designed to artificially inflate trading volumes. Polymarket has since investigated and blocked some accounts but has not fully explained how such high volumes were sustained. The Ethiopian market remained open for 123 days after the election, and a Romanian market continued trading on an old election alongside a new one, contributing to the 'zombie market' phenomenon.

This surge in suspicious trading volume, particularly the suspected wash trading and activity farming, suggests a potential exploitation of Polymarket's platform mechanics. Traders may be attempting to inflate their activity to qualify for future token airdrops or other incentives, a behavior previously observed in the cryptocurrency space. This raises questions about the integrity of prediction markets as genuine indicators of future events and highlights the challenges in detecting and preventing sophisticated market manipulation.

The Commodity Futures Trading Commission (CFTC) may be compelled to investigate these large-scale anomalies, especially given their previous involvement in similar cases. Polymarket's recent substantial funding and valuation, coupled with its high reported revenue, increase the scrutiny on its operational integrity. The platform's ability to sustain such high volumes of potentially fabricated trades on major political events could impact regulatory oversight and user trust in prediction markets as a whole.