{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/category/elections/",
 "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": 4479,
  "events": 1037,
  "nseries": 945,
  "vol": 1768228756,
  "zero": 957,
  "settled": 2163,
  "yes": 487,
  "no": 1676,
  "first": "2024-04-22",
  "last": "2025-11-23",
  "by_year": [
   {
    "year": 2024,
    "markets": 1228,
    "contracts": 1563534569,
    "never_traded": 73,
    "settled": 964,
    "yes": 234
   },
   {
    "year": 2025,
    "markets": 3251,
    "contracts": 204694187,
    "never_traded": 884,
    "settled": 1199,
    "yes": 253
   }
  ],
  "top_series": [
   {
    "series": "PRES",
    "title": "Presidential elections",
    "markets": 8,
    "contracts": 535948943,
    "never_traded": 2
   },
   {
    "series": "POPVOTEMOV",
    "title": "Popular vote margin of victory",
    "markets": 18,
    "contracts": 134863999,
    "never_traded": 0
   },
   {
    "series": "KXMAYORNYCPARTY",
    "title": "Mayor of NYC party winner",
    "markets": 5,
    "contracts": 121642553,
    "never_traded": 0
   },
   {
    "series": "ECMOV",
    "title": "Electoral college margin of victory",
    "markets": 16,
    "contracts": 86308117,
    "never_traded": 0
   },
   {
    "series": "POPVOTEMOVSMALL",
    "title": "Popular vote margin of victory small",
    "markets": 18,
    "contracts": 84757997,
    "never_traded": 0
   },
   {
    "series": "POPVOTE",
    "title": "Popular vote winner",
    "markets": 2,
    "contracts": 81933515,
    "never_traded": 0
   },
   {
    "series": "POPVOTEMOVSMALLER",
    "title": "Popular vote margin of victory small",
    "markets": 13,
    "contracts": 37209372,
    "never_traded": 0
   },
   {
    "series": "SENATEAZ",
    "title": "Arizona Senate race",
    "markets": 4,
    "contracts": 35499031,
    "never_traded": 0
   },
   {
    "series": "KXPRESNOMD",
    "title": "Democratic Primary winner",
    "markets": 38,
    "contracts": 28945295,
    "never_traded": 0
   },
   {
    "series": "PRESPARTYFULL",
    "title": "Popular vote/Electoral College winner",
    "markets": 4,
    "contracts": 28921006,
    "never_traded": 0
   }
  ]
 }
}