According to CoinMeta, Kalshi reached a trading volume of approximately $65 billion in October, which is a 10% increase from September's record. Meanwhile, Polymarket US also achieved a trading volume of $10 billion, exceeding its previous monthly total by about 15%. Both platforms broke their respective monthly trading records ahead of the upcoming mid-term elections in the United States, indicating a rapid expansion of the market in that country. The report also shows that the number of open contracts for Kalshi reached a record level, with Kalshi accounting for $2.05 billion and Polymarket US at $384 million. These two regulated US exchanges together generated 95.6% of the activity across the three major platforms.