Kalshi and Polymarket US Set October Volume Records

Kalshi and Polymarket US have surpassed their previous monthly trading records before October ends, as activity accelerates across regulated U.S. prediction markets. Kalshi reached approximately $65 billion in October notional trading volume, while Polymarket US approached $10 billion. Both platforms set new monthly highs ahead of the November 3 U.S. midterm elections, extending growth across prediction markets.

Kalshi’s October total was about 10% above its September record, while Polymarket US exceeded its previous monthly high by roughly 15%. DefiLlama currently tracks Kalshi with $89.77 billion in trailing 30-day notional volume and Polymarket US with $13.62 billion, reflecting continued activity beyond calendar-month snapshots. The figures measure trading activity and do not establish that election-related contracts alone caused the increase.

The next test is whether elevated volumes persist through and after the November midterms. Political markets could add another source of activity alongside sports and other event contracts, but the mix may shift once major election outcomes are resolved. Post-election volume and open interest will show whether October’s records represent sustained platform growth or a temporary concentration around high-interest events.

Source: DefiLlama – Kalshi; DefiLlama – Polymarket.

Disclaimer: Crypto Economy Flash News are based on verified public and official sources. Their purpose is to provide fast, factual updates about relevant events in the crypto and blockchain ecosystem.

This information does not constitute financial advice or investment recommendation. Readers are encouraged to verify all details through official project channels before making any related decisions.