{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/category/commodities/",
 "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": 4960,
  "events": 333,
  "nseries": 6,
  "vol": 191771,
  "zero": 4693,
  "settled": 887,
  "yes": 71,
  "no": 816,
  "first": "2024-10-24",
  "last": "2025-11-21",
  "by_year": [
   {
    "year": 2024,
    "markets": 910,
    "contracts": 30957,
    "never_traded": 722,
    "settled": 707,
    "yes": 59
   },
   {
    "year": 2025,
    "markets": 4050,
    "contracts": 160814,
    "never_traded": 3971,
    "settled": 180,
    "yes": 12
   }
  ],
  "top_series": [
   {
    "series": "KXWTIW",
    "title": "WTI oil weekly range",
    "markets": 855,
    "contracts": 140084,
    "never_traded": 781
   },
   {
    "series": "KXWTI",
    "title": "WTI oil on day",
    "markets": 4080,
    "contracts": 25048,
    "never_traded": 3898
   },
   {
    "series": "KXWTIMAX",
    "title": "WTI oil high",
    "markets": 5,
    "contracts": 24500,
    "never_traded": 0
   },
   {
    "series": "KXWTIMIN",
    "title": "WTI oil low",
    "markets": 4,
    "contracts": 2099,
    "never_traded": 0
   },
   {
    "series": "KXWTIEU",
    "title": "WTI oil up after election",
    "markets": 1,
    "contracts": 30,
    "never_traded": 0
   },
   {
    "series": "KXWTIE",
    "title": "WTI oil election day",
    "markets": 15,
    "contracts": 10,
    "never_traded": 14
   }
  ]
 }
}