The trading volume of the prediction market Kalshi and Polymarket reached 8.56 billion dollars in two days

According to Bloomberg, on October 11, 2026, the prediction market platforms Kalshi and Polymarket saw record trading volumes over the weekend driven by NFL and NCAA events, with a total of $8.56 billion over two days, data compiled by Dune Analytics shows. The combined trading volume of the two platforms reached $22.2 billion that week, also setting a record.

The prediction markets previously allowed users to trade on a variety of events, from Federal Reserve decisions to pop culture. This season's American football season shows that its growth is increasingly reliant on sports trading. The surge in NFL trading on Kalshi and Polymarket has prompted a review of sports betting regulations.