{
  "id": 10636562,
  "title": "Kalshi Hits $15.66B as Combination Bets Lift Weekly Trading",
  "url": "https://urgent.news/2026/09/29/kalshi-hits-15-66b-as-combination-bets-lift-weekly-trading",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-29T06:11:52.000Z",
  "source": {
    "name": "ReadWrite",
    "slug": "readwrite",
    "url": "https://readwrite.com/prediction-market-volume/"
  },
  "original_language": "en",
  "account": "Kalshi, Polymarket US, and Polymarket International combined for an approximate $19.46 billion in trading volume from September 21-27, a 3.9% increase from $18.72 billion the previous week according to DeFi Rate analysis. Polymarket US contributed the most to this growth, increasing its share from 12.5% to 14.6%. Kalshi outdid itself with a record $15.66 billion in volume, accounting for 80.5% of the total. Most of the growth on Polymarket US came from combination bets, which rose 44.4% from $1.06 billion to $1.53 billion and became 54.1% of the platform's volume. Football dominated the leaderboard, but combination contracts accounted for 95.9% of the platform's week-over-week increase, with the remaining 4.4% coming from other markets. Bitcoin markets saw a significant drop from $453,000 to $50.7 million, almost entirely due to 15-minute and hourly contracts. Polymarket US now accounts for over 95% of volume across the three platforms DeFi Rate tracks, with Polymarket US responsible for roughly two-thirds of the week's net increase.",
  "summary": "Prediction market volume reached $19.46 billion for the week as Polymarket US grew 21%, driven largely by combination contracts while Kalshi held 80.5%. The post Kalshi Hits $15.66B as Combination Bets Lift Weekly Trading appeared first on ReadWrite .",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}