{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/category/climate-and-weather/",
 "source": "Becker Kalshi dataset (github.com/Jon-Becker/prediction-market-analysis); categories from Kalshi public API GET /trade-api/v2/series fetched 2026-10-17",
 "snapshot": "2026-10-17",
 "units": {
  "contracts": "sum of markets.volume (contracts, not dollars)"
 },
 "data": {
  "markets": 48981,
  "events": 11754,
  "nseries": 140,
  "vol": 284181004,
  "zero": 14721,
  "settled": 48354,
  "yes": 7361,
  "no": 40993,
  "first": "2021-07-02",
  "last": "2025-11-23",
  "by_year": [
   {
    "year": 2021,
    "markets": 647,
    "contracts": 2675973,
    "never_traded": 9,
    "settled": 647,
    "yes": 346
   },
   {
    "year": 2022,
    "markets": 3110,
    "contracts": 9100801,
    "never_traded": 39,
    "settled": 3110,
    "yes": 938
   },
   {
    "year": 2023,
    "markets": 7680,
    "contracts": 6936027,
    "never_traded": 1522,
    "settled": 7673,
    "yes": 1303
   },
   {
    "year": 2024,
    "markets": 13459,
    "contracts": 93003563,
    "never_traded": 4034,
    "settled": 13407,
    "yes": 1879
   },
   {
    "year": 2025,
    "markets": 24085,
    "contracts": 172464640,
    "never_traded": 9117,
    "settled": 23517,
    "yes": 2895
   }
  ],
  "top_series": [
   {
    "series": "KXHIGHNY",
    "title": "Highest temperature in NYC",
    "markets": 2382,
    "contracts": 52070182,
    "never_traded": 31
   },
   {
    "series": "KXHIGHAUS",
    "title": "Highest temperature in Austin",
    "markets": 2382,
    "contracts": 39199934,
    "never_traded": 23
   },
   {
    "series": "KXHIGHCHI",
    "title": "Highest temperature in Chicago",
    "markets": 2382,
    "contracts": 39062421,
    "never_traded": 27
   },
   {
    "series": "KXHIGHMIA",
    "title": "Highest temperature in Miami",
    "markets": 2382,
    "contracts": 29747775,
    "never_traded": 104
   },
   {
    "series": "KXHIGHLAX",
    "title": "Highest temperature in Los Angeles",
    "markets": 1944,
    "contracts": 27033427,
    "never_traded": 57
   },
   {
    "series": "KXHIGHDEN",
    "title": "Highest temperature in Denver",
    "markets": 2220,
    "contracts": 26219521,
    "never_traded": 21
   },
   {
    "series": "KXHIGHPHIL",
    "title": "Highest temperature in Philadelphia",
    "markets": 2220,
    "contracts": 17290446,
    "never_traded": 54
   },
   {
    "series": "HIGHNY",
    "title": "Highest temperature in NYC",
    "markets": 5416,
    "contracts": 9649347,
    "never_traded": 519
   },
   {
    "series": "HIGHCHI",
    "title": "Highest temperature in Chicago",
    "markets": 5413,
    "contracts": 9606857,
    "never_traded": 489
   },
   {
    "series": "KXHIGHHOU",
    "title": "Highest temperature in Houston",
    "markets": 420,
    "contracts": 6416018,
    "never_traded": 21
   }
  ]
 }
}