Kalshi Surpasses US$81.5 Billion in 30-Day Prediction Market Volume
United States.- 23 October 2026 | www.zonadeazar.com Kalshi, the US prediction market exchange, recorded US$81.5 billion in notional trading volume over the past 30 days, according to figures published by DeFi Rate on 22 October 2026.
The result represents 53% growth compared with the previous 30-day period, reinforcing Kalshi’s position among the industry’s leading operators.
The platform accounts for approximately 76% of total notional volume across the prediction markets monitored by DeFi Rate.
Kalshi’s Key Performance Indicators
The analysis covers 22 September to 21 October 2026.
Key figures include:
- US$81.5 billion: notional trading volume over 30 days.
- US$18.8 billion: actual dollars paid for traded contracts.
- 53%: growth compared with the preceding period.
- 76%: Kalshi’s share of total notional trading volume.
- 418.9 million: transactions recorded during the period.
- US$22.4 billion: notional volume over the latest seven days.
The figures highlight substantial trading activity, although notional contract value must be distinguished from actual expenditure.
October Delivers New Trading Records
One of the most notable sessions occurred on 18 October, when Kalshi recorded approximately US$4.47 billion in daily notional volume.
That day also generated US$1.05 billion in actual dollars paid across 18.3 million transactions.
The seven-day period from 15 to 21 October reached US$22.4 billion, representing the platform’s highest weekly volume since August 2025.
Meanwhile, September 2026 remains Kalshi’s busiest completed month, with US$60.7 billion in notional contracts traded.
Sports and Cryptocurrency Drive Activity
DeFi Rate identifies sports and cryptocurrency as two of Kalshi’s most active categories.
Over the latest 30-day period:
- Sports: US$15.9 billion, up 8.3%.
- Cryptocurrency: US$10.5 billion, up 21.3%.
- Finance: US$1.2 billion, up 276%.
- Politics: US$276 million, up 59.8%.
These figures cover individual categories identified by the platform. Combined contracts are accounted for separately, meaning the figures do not add up to total trading volume.
Understanding Notional and Actual Trading Volume
DeFi Rate distinguishes between two important measures.
Notional volume assigns a value of US$1 to each contract traded, while actual dollars paid represent the transaction price.
For example, purchasing a contract at US$0.25 contributes one dollar to notional volume, although the buyer pays only 25 cents.
This methodology explains the difference between US$81.5 billion in notional volume and US$18.8 billion in actual expenditure over the period.
Industry Impact and Outlook
Kalshi’s growth reflects the expansion of prediction markets, particularly across sports-related and financial event contracts.
The company competes with platforms including Polymarket, DraftKings Predictions, Novig and Underdog Exchange, amid increasing trading activity and regulatory debate.
For the wider iGaming industry, the figures demonstrate the growing commercial importance of contracts linked to future events.
The sector’s development will continue to depend on liquidity, regulatory conditions and demand for new prediction market products.
Editó: @fonta
