{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/stats/never-traded/",
 "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": {
  "by_category": {
   "Sports": {
    "markets": 110530,
    "never_traded": 19323
   },
   "Elections": {
    "markets": 4479,
    "never_traded": 957
   },
   "Crypto": {
    "markets": 1868823,
    "never_traded": 1698984
   },
   "Economics": {
    "markets": 8752,
    "never_traded": 2618
   },
   "Politics": {
    "markets": 8053,
    "never_traded": 805
   },
   "Financials": {
    "markets": 1654098,
    "never_traded": 1523502
   },
   "Climate and Weather": {
    "markets": 48981,
    "never_traded": 14721
   },
   "Entertainment": {
    "markets": 56190,
    "never_traded": 36332
   },
   "Exotics": {
    "markets": 3883964,
    "never_traded": 3441028
   },
   "Mentions": {
    "markets": 19277,
    "never_traded": 8868
   },
   "Science and Technology": {
    "markets": 810,
    "never_traded": 87
   },
   "Companies": {
    "markets": 450,
    "never_traded": 70
   },
   "Health": {
    "markets": 632,
    "never_traded": 8
   },
   "World": {
    "markets": 368,
    "never_traded": 45
   },
   "Transportation": {
    "markets": 1574,
    "never_traded": 475
   },
   "Commodities": {
    "markets": 4960,
    "never_traded": 4693
   }
  },
  "by_year": [
   {
    "year": 2021,
    "markets": 1382,
    "contracts": 13481158,
    "never_traded": 14,
    "settled": 1382,
    "yes": 678
   },
   {
    "year": 2022,
    "markets": 14436,
    "contracts": 114599860,
    "never_traded": 1520,
    "settled": 14436,
    "yes": 3252
   },
   {
    "year": 2023,
    "markets": 34194,
    "contracts": 183661198,
    "never_traded": 11583,
    "settled": 34060,
    "yes": 7873
   },
   {
    "year": 2024,
    "markets": 468956,
    "contracts": 2380123799,
    "never_traded": 352528,
    "settled": 467140,
    "yes": 199691
   },
   {
    "year": 2025,
    "markets": 7163477,
    "contracts": 15347146459,
    "never_traded": 6389210,
    "settled": 6797368,
    "yes": 1534694
   }
  ]
 }
}