{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/stats/yes-rate-by-category/",
 "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": {
    "settled": 97479,
    "yes": 35103,
    "no": 62376
   },
   "Elections": {
    "settled": 2163,
    "yes": 487,
    "no": 1676
   },
   "Crypto": {
    "settled": 1852082,
    "yes": 486634,
    "no": 1365448
   },
   "Economics": {
    "settled": 7450,
    "yes": 3669,
    "no": 3781
   },
   "Politics": {
    "settled": 6570,
    "yes": 1534,
    "no": 5036
   },
   "Financials": {
    "settled": 1641217,
    "yes": 820814,
    "no": 820403
   },
   "Climate and Weather": {
    "settled": 48354,
    "yes": 7361,
    "no": 40993
   },
   "Entertainment": {
    "settled": 51294,
    "yes": 5861,
    "no": 45433
   },
   "Exotics": {
    "settled": 3575638,
    "yes": 375134,
    "no": 3200504
   },
   "Mentions": {
    "settled": 17509,
    "yes": 5423,
    "no": 12086
   },
   "Science and Technology": {
    "settled": 469,
    "yes": 171,
    "no": 298
   },
   "Companies": {
    "settled": 307,
    "yes": 141,
    "no": 166
   },
   "Health": {
    "settled": 578,
    "yes": 285,
    "no": 293
   },
   "World": {
    "settled": 325,
    "yes": 101,
    "no": 224
   },
   "Transportation": {
    "settled": 1573,
    "yes": 760,
    "no": 813
   },
   "Commodities": {
    "settled": 887,
    "yes": 71,
    "no": 816
   }
  },
  "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
   }
  ]
 }
}