According to Deep Tide TechFlow news on December 1, The Block reported that the prediction market platforms Kalshi and Polymarket both set monthly volume historical highs in November.
According to data from The Block, Kalshi's November spot trading volume increased from $4.4 billion in October to $5.8 billion, a month-on-month growth of 32%. Polymarket also performed strongly, with November trading volume rising from $3.02 billion in October to over $3.7 billion, a month-on-month increase of 23.8%.
The two platforms combined had a trading volume of nearly 10 billion USD in November, continuing the record-breaking activity since the summer. Market share data shows that Kalshi and Polymarket currently dominate global prediction market traffic, forming a rapidly consolidating duopoly.