{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/category/exotics/",
 "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": 3883964,
  "events": 1113120,
  "nseries": 6,
  "vol": 216053957,
  "zero": 3441028,
  "settled": 3575638,
  "yes": 375134,
  "no": 3200504,
  "first": "2025-09-17",
  "last": "2025-11-23",
  "by_year": [
   {
    "year": 2025,
    "markets": 3883964,
    "contracts": 216053957,
    "never_traded": 3441028,
    "settled": 3575638,
    "yes": 375134
   }
  ],
  "top_series": [
   {
    "series": "KXMVENFLMULTIGAMEEXTENDED",
    "title": "MVE NFL Multi Game Extended",
    "markets": 1991987,
    "contracts": 124386364,
    "never_traded": 1772447
   },
   {
    "series": "KXMVENFLSINGLEGAME",
    "title": "MVE NFL Single Game",
    "markets": 1385795,
    "contracts": 64963059,
    "never_traded": 1213369
   },
   {
    "series": "KXMVESPORTSMULTIGAMEEXTENDED",
    "title": "MVE Sport Mutli Game",
    "markets": 392453,
    "contracts": 24973879,
    "never_traded": 350962
   },
   {
    "series": "KXMVENBASINGLEGAME",
    "title": "MVE NBA Single Game",
    "markets": 100567,
    "contracts": 1449997,
    "never_traded": 92118
   },
   {
    "series": "KXMVENFLMULTIGAME",
    "title": "MVE NFL Multi Game",
    "markets": 12943,
    "contracts": 274716,
    "never_traded": 11938
   },
   {
    "series": "KXMVENBAMULTIGAMEEXTENDED",
    "title": "MVE NBA Multi Game",
    "markets": 219,
    "contracts": 5942,
    "never_traded": 194
   }
  ]
 }
}