[Data: Prediction market trading volume reaches $8.7 billion in October, Kalshi leads, Polymarket follows] Odaily Planet Daily reports that dash posted on the X platform stating that October was the most active month in the history of prediction markets. Key data is as follows: - Total users reached 524,200, with 40.4% being new users. - Total number of trades reached 30 million. - Nominal trading volume reached $8.7 billion. Kalshi leads in both trading volume and number of trades, with a market share of 45% to 55%. Polymarket follows closely, while other smaller projects account for only about 7% to 10%.