Kalshi does $19bn in one week, mostly sports, not politics

DeFi Rate puts execution-price volume at $4.42bn, less than a quarter of the headline figure.

The hit

Kalshi recorded $19.03bn in contract volume for 5-11 October, the highest in a six-week series reviewed by DeFi Rate. Most of it came from sports & parlay-style “Combos”, not elections or crypto. The figure is measured at payout value, not what buyers actually paid.

Why it matters

For bettors & industry watchers, the number looks huge but doesn’t mean $19bn changed hands. Cheap, long-shot Combos can rack up massive notional value from tiny purchase prices, swelling headline volume without matching new money or deposits. That arithmetic doesn’t by itself show artificial trading or improper reporting, according to CCN, but it makes Kalshi’s growth claims, & comparisons with rivals, harder to read at face value.

The record

Weekly contract volume	$19.03bn, 5-11 October (DeFi Rate)
Execution-price volume	$4.42bn (DeFi Rate), same week
Sports share of 30-day volume to 6 October	84%, including 61% from Combos, per data cited by CCN
Combos share on 10-11 October	approximately 70% of notional activity (Bitcoin.com)
Polymarket cash-dollar volume	approximately $498.81m for the same week (DeFi Rate)

What happens next

Watch for Kalshi’s next weekly figures & whether DeFi Rate or rivals publish execution-price turnover, active customer counts or fees to back up notional volume claims.

Sources: Kalshi Just Did $19 Billion in a Single Week, and Most of It Wasn’t Elections or Crypto

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