According to on-chain data from KalshiData, Kalshi's 2025 trading volume reached $23.8 billion, a 1,108% increase compared to the previous year. In December alone, the notional volume amounted to $6.38 billion, with a single-day peak of $381.7 million on December 21. The weekly high reached $1.7 billion, demonstrating strong momentum as the year came to a close.

ChainCatcher News: KalshiData posted on the X platform, stating that all Kalshi metrics achieved record growth in 2025.In terms of notional trading volume, the total for the year reached $23.8 billion, representing a year-over-year increase of 1,108%, or approximately 12.1 times. December set a monthly record of $6.38 billion, the fourth week of December set a weekly record of $1.7 billion, and December 21 set a daily record of $381.7 million.In terms of the number of trades, the total for the year reached 97 million, a year-over-year increase of 1,680%, or approximately 17.8 times. December saw 27.67 million trades, the fourth week of December saw 7.6 million trades, and December 21 saw 1.5 million trades, all setting new records.In terms of open interest, the total reached $22.5 million, a year-over-year increase of 169%, or approximately 2.7 times. March 9 set a daily record of $53.3 million, the first week of March set a weekly record of $53 million, and February set a monthly record of $49.95 million.In terms of the number of traded contracts, the total for the year reached 23.8 billion, a year-over-year increase of 1,108%, or approximately 12.1 times. December, the fourth week of December, and December 21 set monthly, weekly, and daily records of 63.8 billion, 17 billion, and 3.82 billion contracts, respectively.