On December 5, according to Dune data, trading activity on major prediction platforms remains robust, with both notional trading volume and number of trades reaching all-time highs. Specifically, the notional trading volume on major prediction platforms across the network reached $3.495 billion in the past week. Among them, Kalshi, Opinion, and Polymarket each exceeded $1 billion, with $1.212 billion, $1.096 billion, and $1.083 billion respectively, ranking as the top three. In addition, the number of trades on major prediction platforms hit a record high in the past week, reaching 11.336 million trades.