Prediction Markets Post Best Month on Record With $123B Volume, 643M Trades in October

Prediction markets generated a record $123.3 billion in October trading volume, the first month above $100 billion and a 53.9% increase from September’s previous high, Artemis data showed, while trades reached 642.9 million. Kalshi accounted for $98.2 billion, about 80% of the sector, and 465.5 million trades; Polymarket was second at $20.2 billion and 148 million trades. NFL and college football drove the month, helping Kalshi set three straight weekly volume records, including more than $25 billion in the week ending Oct. 25. Combos made up 67.6% of Kalshi’s volume, mostly long-shot bets priced below 1 cent; Kalshi records each contract at its full $1 payout regardless of purchase price.