Winning odds for the "Yes" side of Polymarket's "Farage 80%+" contract in the "Clacton By-Election: Farage's Vote Share" market swung sharply lower, falling from 48.5% an hour earlier to 30.5%, according to monitoring by Catcher Predict. The 18-point move shows how prediction markets (event-based trading venues) can quickly adjust implied probabilities as new information reaches traders. Catcher Predict said the move may be linked to related breaking news affecting expectations for Nigel Farage's eventual vote share in the Clacton by-election.