{
 "page": "https://prediction-market-use-cases.vercel.app/kalshi/series/kxnflspread/",
 "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": {
  "category": "Sports",
  "title": "Pro Football Spread",
  "frequency": "custom",
  "markets": 5969,
  "events": 210,
  "vol": 247733494,
  "zero": 3015,
  "settled": 5501,
  "yes": 1085,
  "no": 4416,
  "first": "2025-08-18",
  "last": "2025-11-18",
  "by_month": [
   [
    "2025-08",
    3136,
    2540668,
    2768,
    3136,
    288
   ],
   [
    "2025-09",
    692,
    50920887,
    14,
    692,
    277
   ],
   [
    "2025-10",
    1399,
    150363256,
    4,
    1399,
    457
   ],
   [
    "2025-11",
    742,
    43908683,
    229,
    274,
    63
   ]
  ],
  "trades_by_month": [
   [
    "2025-08",
    742,
    434295
   ],
   [
    "2025-09",
    118157,
    34090847
   ],
   [
    "2025-10",
    294564,
    112694120
   ],
   [
    "2025-11",
    297791,
    119047669
   ]
  ],
  "top_events": [
   [
    "KXNFLSPREAD-25OCT27WASKC",
    15,
    6897515
   ],
   [
    "KXNFLSPREAD-25NOV20BUFHOU",
    18,
    6408289
   ],
   [
    "KXNFLSPREAD-25NOV03ARIDAL",
    17,
    6159223
   ],
   [
    "KXNFLSPREAD-25NOV17DALLV",
    17,
    5729792
   ],
   [
    "KXNFLSPREAD-25NOV06LVDEN",
    16,
    5496035
   ]
  ]
 }
}