{
 "slug": "ma-09-house-election-winner",
 "title": "MA-09 House Election Winner",
 "url": "https://polymarkettrader.com/odds/ma-09-house-election-winner/",
 "polymarket_url": "https://polymarket.com/event/ma-09-house-election-winner",
 "category": "politics",
 "closed": false,
 "updated": "2026-10-03T00:50:00+00:00",
 "end_date": "2026-11-04T04:59:00+00:00",
 "volume": 25872.95,
 "volume_24h": 2509.14,
 "liquidity": 97865.58,
 "outcomes": [
  {
   "name": "Bill Keating (D)",
   "probability": 0.9525,
   "change_24h": -0.0125,
   "volume": 8501.75,
   "closed": false
  },
  {
   "name": "Tyler MacAllister (R)",
   "probability": 0.0285,
   "change_24h": -0.006,
   "volume": 17371.21,
   "closed": false
  }
 ],
 "history": {
  "Bill Keating (D)": [
   [
    1788436829,
    0.9535
   ],
   [
    1788480021,
    0.9515
   ],
   [
    1788523222,
    0.9515
   ],
   [
    1788566422,
    0.952
   ],
   [
    1788609625,
    0.9525
   ],
   [
    1788652827,
    0.9525
   ],
   [
    1788696022,
    0.9545
   ],
   [
    1788739235,
    0.952
   ],
   [
    1788782424,
    0.9525
   ],
   [
    1788825618,
    0.952
   ],
   [
    1788868821,
    0.9515
   ],
   [
    1788912027,
    0.952
   ],
   [
    1788955225,
    0.952
   ],
   [
    1788998421,
    0.952
   ],
   [
    1789041622,
    0.9515
   ],
   [
    1789084824,
    0.9515
   ],
   [
    1789128026,
    0.9515
   ],
   [
    1789171224,
    0.952
   ],
   [
    1789214426,
    0.951
   ],
   [
    1789257623,
    0.951
   ],
   [
    1789300826,
    0.951
   ],
   [
    1789344019,
    0.9515
   ],
   [
    1789387218,
    0.9515
   ],
   [
    1789430418,
    0.9505
   ],
   [
    1789473619,
    0.9505
   ],
   [
    1789516819,
    0.9515
   ],
   [
    1789560031,
    0.9515
   ],
   [
    1789603222,
    0.9515
   ],
   [
    1789646422,
    0.952
   ],
   [
    1789689625,
    0.951
   ],
   [
    1789732826,
    0.9515
   ],
   [
    1789776027,
    0.9515
   ],
   [
    1789819227,
    0.952
   ],
   [
    1789862425,
    0.9515
   ],
   [
    1789905622,
    0.9515
   ],
   [
    1789948822,
    0.952
   ],
   [
    1789992017,
    0.952
   ],
   [
    1790035222,
    0.952
   ],
   [
    1790078422,
    0.951
   ],
   [
    1790121624,
    0.9515
   ],
   [
    1790164835,
    0.9515
   ],
   [
    1790208035,
    0.952
   ],
   [
    1790251225,
    0.9525
   ],
   [
    1790294428,
    0.952
   ],
   [
    1790337622,
    0.952
   ],
   [
    1790380822,
    0.952
   ],
   [
    1790424021,
    0.952
   ],
   [
    1790467222,
    0.952
   ],
   [
    1790510422,
    0.9515
   ],
   [
    1790553636,
    0.952
   ],
   [
    1790596821,
    0.951
   ],
   [
    1790640023,
    0.9525
   ],
   [
    1790683226,
    0.951
   ],
   [
    1790726425,
    0.963
   ],
   [
    1790769624,
    0.9615
   ],
   [
    1790812827,
    0.9605
   ],
   [
    1790856026,
    0.965
   ],
   [
    1790899225,
    0.967
   ],
   [
    1790942424,
    0.9655
   ],
   [
    1790985628,
    0.9525
   ],
   [
    1790989514,
    0.9525
   ]
  ],
  "Tyler MacAllister (R)": [
   [
    1788436822,
    0.045
   ],
   [
    1788480018,
    0.045
   ],
   [
    1788523218,
    0.045
   ],
   [
    1788566418,
    0.045
   ],
   [
    1788609620,
    0.045
   ],
   [
    1788652824,
    0.045
   ],
   [
    1788696018,
    0.045
   ],
   [
    1788739232,
    0.045
   ],
   [
    1788782419,
    0.045
   ],
   [
    1788825616,
    0.045
   ],
   [
    1788868818,
    0.045
   ],
   [
    1788912023,
    0.045
   ],
   [
    1788955221,
    0.045
   ],
   [
    1788998418,
    0.045
   ],
   [
    1789041618,
    0.045
   ],
   [
    1789084820,
    0.045
   ],
   [
    1789128021,
    0.045
   ],
   [
    1789171220,
    0.045
   ],
   [
    1789214421,
    0.045
   ],
   [
    1789257619,
    0.045
   ],
   [
    1789300822,
    0.045
   ],
   [
    1789344016,
    0.045
   ],
   [
    1789387215,
    0.045
   ],
   [
    1789430415,
    0.045
   ],
   [
    1789473615,
    0.045
   ],
   [
    1789516817,
    0.045
   ],
   [
    1789560023,
    0.045
   ],
   [
    1789603218,
    0.045
   ],
   [
    1789646417,
    0.045
   ],
   [
    1789689621,
    0.045
   ],
   [
    1789732821,
    0.045
   ],
   [
    1789776021,
    0.045
   ],
   [
    1789819221,
    0.045
   ],
   [
    1789862421,
    0.045
   ],
   [
    1789905618,
    0.045
   ],
   [
    1789948818,
    0.045
   ],
   [
    1789992013,
    0.045
   ],
   [
    1790035218,
    0.045
   ],
   [
    1790078417,
    0.045
   ],
   [
    1790121619,
    0.045
   ],
   [
    1790164826,
    0.045
   ],
   [
    1790208030,
    0.045
   ],
   [
    1790251220,
    0.045
   ],
   [
    1790294422,
    0.045
   ],
   [
    1790337618,
    0.045
   ],
   [
    1790380818,
    0.045
   ],
   [
    1790424017,
    0.045
   ],
   [
    1790467218,
    0.045
   ],
   [
    1790510417,
    0.045
   ],
   [
    1790553632,
    0.045
   ],
   [
    1790596817,
    0.045
   ],
   [
    1790640019,
    0.045
   ],
   [
    1790683220,
    0.045
   ],
   [
    1790726420,
    0.0385
   ],
   [
    1790769620,
    0.035
   ],
   [
    1790812822,
    0.0365
   ],
   [
    1790856020,
    0.034
   ],
   [
    1790899220,
    0.033
   ],
   [
    1790942419,
    0.0295
   ],
   [
    1790985623,
    0.0285
   ],
   [
    1790989512,
    0.027
   ]
  ]
 },
 "license": "CC BY 4.0",
 "license_url": "https://creativecommons.org/licenses/by/4.0/",
 "attribution": {
  "required": true,
  "text": "Odds data: PolymarketTrader.com",
  "url": "https://polymarkettrader.com/odds/ma-09-house-election-winner/",
  "html": "<a href=\"https://polymarkettrader.com/odds/ma-09-house-election-winner/\">Odds data: PolymarketTrader.com</a>"
 },
 "source": "Polymarket public Gamma and CLOB APIs; not affiliated with Polymarket."
}