{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/category/companies/",
 "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": 450,
  "events": 153,
  "nseries": 118,
  "vol": 10967067,
  "zero": 70,
  "settled": 307,
  "yes": 141,
  "no": 166,
  "first": "2023-04-13",
  "last": "2025-11-17",
  "by_year": [
   {
    "year": 2023,
    "markets": 41,
    "contracts": 760342,
    "never_traded": 2,
    "settled": 37,
    "yes": 10
   },
   {
    "year": 2024,
    "markets": 254,
    "contracts": 7789885,
    "never_traded": 25,
    "settled": 230,
    "yes": 112
   },
   {
    "year": 2025,
    "markets": 155,
    "contracts": 2416840,
    "never_traded": 43,
    "settled": 40,
    "yes": 19
   }
  ],
  "top_series": [
   {
    "series": "TIKTOKBAN",
    "title": "US bans TikTok",
    "markets": 5,
    "contracts": 3907027,
    "never_traded": 0
   },
   {
    "series": "KXMUSKPACKAGEVOTE",
    "title": "Musk comp package vote",
    "markets": 1,
    "contracts": 1594577,
    "never_traded": 0
   },
   {
    "series": "ROBOTAXIOUT",
    "title": "Robotaxi release",
    "markets": 1,
    "contracts": 961900,
    "never_traded": 0
   },
   {
    "series": "TESLA",
    "title": "Tesla deliveries",
    "markets": 45,
    "contracts": 452265,
    "never_traded": 1
   },
   {
    "series": "TESLACEOCHANGE",
    "title": "New Tesla CEO",
    "markets": 3,
    "contracts": 421913,
    "never_traded": 0
   },
   {
    "series": "SPACEXCOUNT",
    "title": "SpaceX launches",
    "markets": 9,
    "contracts": 346872,
    "never_traded": 0
   },
   {
    "series": "SPACEXSTARSHIP",
    "title": "SpaceX Starship launch",
    "markets": 26,
    "contracts": 290881,
    "never_traded": 4
   },
   {
    "series": "KXOAIPROFIT",
    "title": "OpenAI becomes for-profit",
    "markets": 2,
    "contracts": 264774,
    "never_traded": 0
   },
   {
    "series": "TESLAPROD",
    "title": "Tesla production",
    "markets": 22,
    "contracts": 249591,
    "never_traded": 0
   },
   {
    "series": "TIKTOKSELL",
    "title": "Congress passes law to force TikTok sale",
    "markets": 1,
    "contracts": 202826,
    "never_traded": 0
   }
  ]
 }
}