{
  "schema": "cme.zt.tick.continuous/1",
  "as_of_utc": "2026-10-26T05:36:15.994428+00:00",
  "rows": 308703994,
  "volume": 1444889800,
  "first_utc": "2011-05-26T19:10:12+00:00",
  "last_utc": "2026-10-26T05:22:52.480000+00:00",
  "anchor_contract": "ZTZ26-CBOT",
  "adjustments": {
    "ZTZ26-CBOT": 0.0,
    "ZTU26-CBOT": -0.15233999999999526,
    "ZTM26-CBOT": -0.24218000000000472,
    "ZTH26-CBOT": -0.09373999999999683,
    "ZTZ25-CBOT": 0.07032000000000949,
    "ZTU25-CBOT": 0.3437600000000174,
    "ZTM25-CBOT": 0.6289200000000221,
    "ZTH25-CBOT": 0.8945400000000205,
    "ZTZ24-CBOT": 1.0820400000000205,
    "ZTU24-CBOT": 1.6132900000000205,
    "ZTM24-CBOT": 1.941410000000019,
    "ZTH24-CBOT": 2.42188000000003,
    "ZTZ23-CBOT": 2.8671900000000363,
    "ZTU23-CBOT": 3.3007800000000316,
    "ZTM23-CBOT": 3.9335900000000237,
    "ZTH23-CBOT": 4.105460000000022,
    "ZTZ22-CBOT": 4.453120000000013,
    "ZTU22-CBOT": 4.328120000000013,
    "ZTM22-CBOT": 3.8828100000000063,
    "ZTH22-CBOT": 3.558595000000011,
    "ZTZ21-CBOT": 3.2109450000000095,
    "ZTU21-CBOT": 3.050785000000019,
    "ZTM21-CBOT": 2.9726550000000174,
    "ZTH21-CBOT": 2.937505000000016,
    "ZTZ20-CBOT": 2.9336000000000126,
    "ZTU20-CBOT": 2.9765700000000095,
    "ZTM20-CBOT": 3.1171950000000095,
    "ZTH20-CBOT": 3.312505000000016,
    "ZTZ19-CBOT": 3.5117250000000126,
    "ZTU19-CBOT": 3.7773450000000253,
    "ZTM19-CBOT": 4.046875000000014,
    "ZTH19-CBOT": 4.195315000000008,
    "ZTZ18-CBOT": 4.226565000000008,
    "ZTU18-CBOT": 4.093750000000014,
    "ZTM18-CBOT": 3.9843800000000016,
    "ZTH18-CBOT": 3.7343800000000016,
    "ZTZ17-CBOT": 3.562509999999989,
    "ZTU17-CBOT": 3.453134999999989,
    "ZTM17-CBOT": 3.3359449999999953,
    "ZTH17-CBOT": 3.0468800000000016,
    "ZTZ16-CBOT": 2.789065000000008,
    "ZTU16-CBOT": 2.6875050000000016,
    "ZTM16-CBOT": 2.5078199999999953,
    "ZTH16-CBOT": 2.4687550000000016,
    "ZTZ15-CBOT": 2.210940000000008,
    "ZTU15-CBOT": 1.976565000000008,
    "ZTM15-CBOT": 1.6562500000000142,
    "ZTH15-CBOT": 1.2343750000000142,
    "ZTZ14-CBOT": 0.8359350000000205,
    "ZTU14-CBOT": 0.46874500000002683,
    "ZTM14-CBOT": 0.24218000000003315,
    "ZTH14-CBOT": 0.023430000000033147,
    "ZTZ13-CBOT": -0.13281999999996685,
    "ZTU13-CBOT": -0.33594499999996685,
    "ZTM13-CBOT": -0.42188499999996054,
    "ZTH13-CBOT": -0.45313499999996054,
    "ZTZ12-CBOT": -0.4687649999999479,
    "ZTU12-CBOT": -0.44532499999995423,
    "ZTM12-CBOT": -0.4843899999999479,
    "ZTH12-CBOT": -0.5781399999999479,
    "ZTZ11-CBOT": -0.5234499999999542,
    "ZTU11-CBOT": -0.5468849999999605,
    "ZTM11-CBOT": -0.9140699999999669
  },
  "files": [
    "cme.zt.tick.continuous.2011.parquet",
    "cme.zt.tick.continuous.2012.parquet",
    "cme.zt.tick.continuous.2013.parquet",
    "cme.zt.tick.continuous.2014.parquet",
    "cme.zt.tick.continuous.2015.parquet",
    "cme.zt.tick.continuous.2016.parquet",
    "cme.zt.tick.continuous.2017.parquet",
    "cme.zt.tick.continuous.2018.parquet",
    "cme.zt.tick.continuous.2019.parquet",
    "cme.zt.tick.continuous.2020.parquet",
    "cme.zt.tick.continuous.2021.parquet",
    "cme.zt.tick.continuous.2022.parquet",
    "cme.zt.tick.continuous.2023.parquet",
    "cme.zt.tick.continuous.2024.parquet",
    "cme.zt.tick.continuous.2025.parquet",
    "cme.zt.tick.continuous.2026.parquet"
  ],
  "rolls": [
    {
      "from_contract": "ZTM11-CBOT",
      "to_contract": "ZTU11-CBOT",
      "decision_session": "2011-05-31",
      "old_volume": 134848,
      "new_volume": 298968,
      "switch_utc": "2011-05-31T22:00:00+00:00",
      "difference": -0.3671850000000063
    },
    {
      "from_contract": "ZTU11-CBOT",
      "to_contract": "ZTZ11-CBOT",
      "decision_session": "2011-08-31",
      "old_volume": 89474,
      "new_volume": 269774,
      "switch_utc": "2011-08-31T22:00:00+00:00",
      "difference": -0.023435000000006312
    },
    {
      "from_contract": "ZTZ11-CBOT",
      "to_contract": "ZTH12-CBOT",
      "decision_session": "2011-11-30",
      "old_volume": 134757,
      "new_volume": 287240,
      "switch_utc": "2011-11-30T23:00:00+00:00",
      "difference": 0.05468999999999369
    },
    {
      "from_contract": "ZTH12-CBOT",
      "to_contract": "ZTM12-CBOT",
      "decision_session": "2012-02-29",
      "old_volume": 97612,
      "new_volume": 264354,
      "switch_utc": "2012-02-29T23:00:00+00:00",
      "difference": -0.09375
    },
    {
      "from_contract": "ZTM12-CBOT",
      "to_contract": "ZTU12-CBOT",
      "decision_session": "2012-05-31",
      "old_volume": 128338,
      "new_volume": 346647,
      "switch_utc": "2012-05-31T22:00:00+00:00",
      "difference": -0.03906499999999369
    },
    {
      "from_contract": "ZTU12-CBOT",
      "to_contract": "ZTZ12-CBOT",
      "decision_session": "2012-08-31",
      "old_volume": 51343,
      "new_volume": 209525,
      "switch_utc": "2012-09-02T22:00:00+00:00",
      "difference": 0.023439999999993688
    },
    {
      "from_contract": "ZTZ12-CBOT",
      "to_contract": "ZTH13-CBOT",
      "decision_session": "2012-12-03",
      "old_volume": 20155,
      "new_volume": 77862,
      "switch_utc": "2012-12-03T23:00:00+00:00",
      "difference": -0.015629999999987376
    },
    {
      "from_contract": "ZTH13-CBOT",
      "to_contract": "ZTM13-CBOT",
      "decision_session": "2013-02-28",
      "old_volume": 59404,
      "new_volume": 116037,
      "switch_utc": "2013-02-28T23:00:00+00:00",
      "difference": -0.03125
    },
    {
      "from_contract": "ZTM13-CBOT",
      "to_contract": "ZTU13-CBOT",
      "decision_session": "2013-05-30",
      "old_volume": 100477,
      "new_volume": 149545,
      "switch_utc": "2013-05-30T22:00:00+00:00",
      "difference": -0.08593999999999369
    },
    {
      "from_contract": "ZTU13-CBOT",
      "to_contract": "ZTZ13-CBOT",
      "decision_session": "2013-09-02",
      "old_volume": 4485,
      "new_volume": 20486,
      "switch_utc": "2013-09-02T22:00:00+00:00",
      "difference": -0.203125
    },
    {
      "from_contract": "ZTZ13-CBOT",
      "to_contract": "ZTH14-CBOT",
      "decision_session": "2013-12-02",
      "old_volume": 30933,
      "new_volume": 133203,
      "switch_utc": "2013-12-02T23:00:00+00:00",
      "difference": -0.15625
    },
    {
      "from_contract": "ZTH14-CBOT",
      "to_contract": "ZTM14-CBOT",
      "decision_session": "2014-03-03",
      "old_volume": 9582,
      "new_volume": 155600,
      "switch_utc": "2014-03-03T23:00:00+00:00",
      "difference": -0.21875
    },
    {
      "from_contract": "ZTM14-CBOT",
      "to_contract": "ZTU14-CBOT",
      "decision_session": "2014-05-29",
      "old_volume": 123346,
      "new_volume": 140612,
      "switch_utc": "2014-05-29T22:00:00+00:00",
      "difference": -0.2265649999999937
    },
    {
      "from_contract": "ZTU14-CBOT",
      "to_contract": "ZTZ14-CBOT",
      "decision_session": "2014-09-01",
      "old_volume": 2594,
      "new_volume": 13517,
      "switch_utc": "2014-09-01T22:00:00+00:00",
      "difference": -0.3671899999999937
    },
    {
      "from_contract": "ZTZ14-CBOT",
      "to_contract": "ZTH15-CBOT",
      "decision_session": "2014-12-01",
      "old_volume": 16848,
      "new_volume": 257196,
      "switch_utc": "2014-12-01T23:00:00+00:00",
      "difference": -0.3984399999999937
    },
    {
      "from_contract": "ZTH15-CBOT",
      "to_contract": "ZTM15-CBOT",
      "decision_session": "2015-03-02",
      "old_volume": 9256,
      "new_volume": 187879,
      "switch_utc": "2015-03-02T23:00:00+00:00",
      "difference": -0.421875
    },
    {
      "from_contract": "ZTM15-CBOT",
      "to_contract": "ZTU15-CBOT",
      "decision_session": "2015-06-01",
      "old_volume": 18733,
      "new_volume": 261559,
      "switch_utc": "2015-06-01T22:00:00+00:00",
      "difference": -0.3203149999999937
    },
    {
      "from_contract": "ZTU15-CBOT",
      "to_contract": "ZTZ15-CBOT",
      "decision_session": "2015-08-31",
      "old_volume": 32827,
      "new_volume": 266981,
      "switch_utc": "2015-08-31T22:00:00+00:00",
      "difference": -0.234375
    },
    {
      "from_contract": "ZTZ15-CBOT",
      "to_contract": "ZTH16-CBOT",
      "decision_session": "2015-12-01",
      "old_volume": 21988,
      "new_volume": 205341,
      "switch_utc": "2015-12-01T23:00:00+00:00",
      "difference": -0.2578149999999937
    },
    {
      "from_contract": "ZTH16-CBOT",
      "to_contract": "ZTM16-CBOT",
      "decision_session": "2016-03-01",
      "old_volume": 25451,
      "new_volume": 299221,
      "switch_utc": "2016-03-01T23:00:00+00:00",
      "difference": -0.03906499999999369
    },
    {
      "from_contract": "ZTM16-CBOT",
      "to_contract": "ZTU16-CBOT",
      "decision_session": "2016-05-31",
      "old_volume": 38216,
      "new_volume": 304309,
      "switch_utc": "2016-05-31T22:00:00+00:00",
      "difference": -0.1796850000000063
    },
    {
      "from_contract": "ZTU16-CBOT",
      "to_contract": "ZTZ16-CBOT",
      "decision_session": "2016-08-31",
      "old_volume": 39203,
      "new_volume": 234877,
      "switch_utc": "2016-08-31T22:00:00+00:00",
      "difference": -0.10156000000000631
    },
    {
      "from_contract": "ZTZ16-CBOT",
      "to_contract": "ZTH17-CBOT",
      "decision_session": "2016-11-30",
      "old_volume": 52798,
      "new_volume": 393617,
      "switch_utc": "2016-11-30T23:00:00+00:00",
      "difference": -0.2578149999999937
    },
    {
      "from_contract": "ZTH17-CBOT",
      "to_contract": "ZTM17-CBOT",
      "decision_session": "2017-02-28",
      "old_volume": 46599,
      "new_volume": 396922,
      "switch_utc": "2017-02-28T23:00:00+00:00",
      "difference": -0.2890649999999937
    },
    {
      "from_contract": "ZTM17-CBOT",
      "to_contract": "ZTU17-CBOT",
      "decision_session": "2017-05-31",
      "old_volume": 39433,
      "new_volume": 303312,
      "switch_utc": "2017-05-31T22:00:00+00:00",
      "difference": -0.11718999999999369
    },
    {
      "from_contract": "ZTU17-CBOT",
      "to_contract": "ZTZ17-CBOT",
      "decision_session": "2017-08-30",
      "old_volume": 115012,
      "new_volume": 177795,
      "switch_utc": "2017-08-30T22:00:00+00:00",
      "difference": -0.109375
    },
    {
      "from_contract": "ZTZ17-CBOT",
      "to_contract": "ZTH18-CBOT",
      "decision_session": "2017-11-30",
      "old_volume": 55452,
      "new_volume": 557047,
      "switch_utc": "2017-11-30T23:00:00+00:00",
      "difference": -0.17187000000001262
    },
    {
      "from_contract": "ZTH18-CBOT",
      "to_contract": "ZTM18-CBOT",
      "decision_session": "2018-02-27",
      "old_volume": 321205,
      "new_volume": 430491,
      "switch_utc": "2018-02-27T23:00:00+00:00",
      "difference": -0.25
    },
    {
      "from_contract": "ZTM18-CBOT",
      "to_contract": "ZTU18-CBOT",
      "decision_session": "2018-05-30",
      "old_volume": 283289,
      "new_volume": 381081,
      "switch_utc": "2018-05-30T22:00:00+00:00",
      "difference": -0.10937000000001262
    },
    {
      "from_contract": "ZTU18-CBOT",
      "to_contract": "ZTZ18-CBOT",
      "decision_session": "2018-08-29",
      "old_volume": 249130,
      "new_volume": 265820,
      "switch_utc": "2018-08-29T22:00:00+00:00",
      "difference": -0.1328149999999937
    },
    {
      "from_contract": "ZTZ18-CBOT",
      "to_contract": "ZTH19-CBOT",
      "decision_session": "2018-11-30",
      "old_volume": 48946,
      "new_volume": 416127,
      "switch_utc": "2018-12-02T23:00:00+00:00",
      "difference": 0.03125
    },
    {
      "from_contract": "ZTH19-CBOT",
      "to_contract": "ZTM19-CBOT",
      "decision_session": "2019-02-27",
      "old_volume": 215477,
      "new_volume": 344933,
      "switch_utc": "2019-02-27T23:00:00+00:00",
      "difference": 0.1484399999999937
    },
    {
      "from_contract": "ZTM19-CBOT",
      "to_contract": "ZTU19-CBOT",
      "decision_session": "2019-05-30",
      "old_volume": 158660,
      "new_volume": 301073,
      "switch_utc": "2019-05-30T22:00:00+00:00",
      "difference": 0.26952999999998895
    },
    {
      "from_contract": "ZTU19-CBOT",
      "to_contract": "ZTZ19-CBOT",
      "decision_session": "2019-09-02",
      "old_volume": 1046,
      "new_volume": 58300,
      "switch_utc": "2019-09-02T22:00:00+00:00",
      "difference": 0.2656200000000126
    },
    {
      "from_contract": "ZTZ19-CBOT",
      "to_contract": "ZTH20-CBOT",
      "decision_session": "2019-12-02",
      "old_volume": 22186,
      "new_volume": 486657,
      "switch_utc": "2019-12-02T23:00:00+00:00",
      "difference": 0.19921999999999684
    },
    {
      "from_contract": "ZTH20-CBOT",
      "to_contract": "ZTM20-CBOT",
      "decision_session": "2020-03-02",
      "old_volume": 14435,
      "new_volume": 1084096,
      "switch_utc": "2020-03-02T23:00:00+00:00",
      "difference": 0.1953100000000063
    },
    {
      "from_contract": "ZTM20-CBOT",
      "to_contract": "ZTU20-CBOT",
      "decision_session": "2020-06-01",
      "old_volume": 7808,
      "new_volume": 234157,
      "switch_utc": "2020-06-01T22:00:00+00:00",
      "difference": 0.140625
    },
    {
      "from_contract": "ZTU20-CBOT",
      "to_contract": "ZTZ20-CBOT",
      "decision_session": "2020-08-31",
      "old_volume": 17345,
      "new_volume": 356174,
      "switch_utc": "2020-08-31T22:00:00+00:00",
      "difference": 0.042969999999996844
    },
    {
      "from_contract": "ZTZ20-CBOT",
      "to_contract": "ZTH21-CBOT",
      "decision_session": "2020-11-30",
      "old_volume": 31130,
      "new_volume": 383258,
      "switch_utc": "2020-11-30T23:00:00+00:00",
      "difference": -0.003905000000003156
    },
    {
      "from_contract": "ZTH21-CBOT",
      "to_contract": "ZTM21-CBOT",
      "decision_session": "2021-03-01",
      "old_volume": 9953,
      "new_volume": 437189,
      "switch_utc": "2021-03-01T23:00:00+00:00",
      "difference": -0.03515000000000157
    },
    {
      "from_contract": "ZTM21-CBOT",
      "to_contract": "ZTU21-CBOT",
      "decision_session": "2021-05-31",
      "old_volume": 766,
      "new_volume": 21081,
      "switch_utc": "2021-05-31T22:00:00+00:00",
      "difference": -0.07813000000000159
    },
    {
      "from_contract": "ZTU21-CBOT",
      "to_contract": "ZTZ21-CBOT",
      "decision_session": "2021-08-30",
      "old_volume": 64422,
      "new_volume": 135225,
      "switch_utc": "2021-08-30T22:00:00+00:00",
      "difference": -0.16015999999999053
    },
    {
      "from_contract": "ZTZ21-CBOT",
      "to_contract": "ZTH22-CBOT",
      "decision_session": "2021-11-30",
      "old_volume": 34916,
      "new_volume": 672162,
      "switch_utc": "2021-11-30T23:00:00+00:00",
      "difference": -0.34765000000000157
    },
    {
      "from_contract": "ZTH22-CBOT",
      "to_contract": "ZTM22-CBOT",
      "decision_session": "2022-03-01",
      "old_volume": 9251,
      "new_volume": 955307,
      "switch_utc": "2022-03-01T23:00:00+00:00",
      "difference": -0.32421499999999526
    },
    {
      "from_contract": "ZTM22-CBOT",
      "to_contract": "ZTU22-CBOT",
      "decision_session": "2022-05-31",
      "old_volume": 27604,
      "new_volume": 613077,
      "switch_utc": "2022-05-31T22:00:00+00:00",
      "difference": -0.4453100000000063
    },
    {
      "from_contract": "ZTU22-CBOT",
      "to_contract": "ZTZ22-CBOT",
      "decision_session": "2022-08-31",
      "old_volume": 17249,
      "new_volume": 468597,
      "switch_utc": "2022-08-31T22:00:00+00:00",
      "difference": -0.125
    },
    {
      "from_contract": "ZTZ22-CBOT",
      "to_contract": "ZTH23-CBOT",
      "decision_session": "2022-11-30",
      "old_volume": 26391,
      "new_volume": 677692,
      "switch_utc": "2022-11-30T23:00:00+00:00",
      "difference": 0.34765999999999053
    },
    {
      "from_contract": "ZTH23-CBOT",
      "to_contract": "ZTM23-CBOT",
      "decision_session": "2023-02-28",
      "old_volume": 15881,
      "new_volume": 504576,
      "switch_utc": "2023-02-28T23:00:00+00:00",
      "difference": 0.1718699999999984
    },
    {
      "from_contract": "ZTM23-CBOT",
      "to_contract": "ZTU23-CBOT",
      "decision_session": "2023-05-31",
      "old_volume": 17065,
      "new_volume": 751149,
      "switch_utc": "2023-05-31T22:00:00+00:00",
      "difference": 0.6328099999999921
    },
    {
      "from_contract": "ZTU23-CBOT",
      "to_contract": "ZTZ23-CBOT",
      "decision_session": "2023-08-29",
      "old_volume": 399383,
      "new_volume": 547821,
      "switch_utc": "2023-08-29T22:00:00+00:00",
      "difference": 0.43358999999999526
    },
    {
      "from_contract": "ZTZ23-CBOT",
      "to_contract": "ZTH24-CBOT",
      "decision_session": "2023-11-28",
      "old_volume": 534853,
      "new_volume": 691723,
      "switch_utc": "2023-11-28T23:00:00+00:00",
      "difference": 0.4453100000000063
    },
    {
      "from_contract": "ZTH24-CBOT",
      "to_contract": "ZTM24-CBOT",
      "decision_session": "2024-02-27",
      "old_volume": 388867,
      "new_volume": 401383,
      "switch_utc": "2024-02-27T23:00:00+00:00",
      "difference": 0.48047000000001105
    },
    {
      "from_contract": "ZTM24-CBOT",
      "to_contract": "ZTU24-CBOT",
      "decision_session": "2024-05-29",
      "old_volume": 471716,
      "new_volume": 549878,
      "switch_utc": "2024-05-29T22:00:00+00:00",
      "difference": 0.3281199999999984
    },
    {
      "from_contract": "ZTU24-CBOT",
      "to_contract": "ZTZ24-CBOT",
      "decision_session": "2024-08-28",
      "old_volume": 340196,
      "new_volume": 493648,
      "switch_utc": "2024-08-28T22:00:00+00:00",
      "difference": 0.53125
    },
    {
      "from_contract": "ZTZ24-CBOT",
      "to_contract": "ZTH25-CBOT",
      "decision_session": "2024-12-02",
      "old_volume": 5274,
      "new_volume": 680644,
      "switch_utc": "2024-12-02T23:00:00+00:00",
      "difference": 0.1875
    },
    {
      "from_contract": "ZTH25-CBOT",
      "to_contract": "ZTM25-CBOT",
      "decision_session": "2025-03-03",
      "old_volume": 2258,
      "new_volume": 932949,
      "switch_utc": "2025-03-03T23:00:00+00:00",
      "difference": 0.2656199999999984
    },
    {
      "from_contract": "ZTM25-CBOT",
      "to_contract": "ZTU25-CBOT",
      "decision_session": "2025-05-28",
      "old_volume": 260563,
      "new_volume": 431023,
      "switch_utc": "2025-05-28T22:00:00+00:00",
      "difference": 0.28516000000000474
    },
    {
      "from_contract": "ZTU25-CBOT",
      "to_contract": "ZTZ25-CBOT",
      "decision_session": "2025-09-01",
      "old_volume": 1249,
      "new_volume": 64157,
      "switch_utc": "2025-09-01T22:00:00+00:00",
      "difference": 0.2734400000000079
    },
    {
      "from_contract": "ZTZ25-CBOT",
      "to_contract": "ZTH26-CBOT",
      "decision_session": "2025-12-01",
      "old_volume": 3504,
      "new_volume": 645868,
      "switch_utc": "2025-12-01T23:00:00+00:00",
      "difference": 0.1640600000000063
    },
    {
      "from_contract": "ZTH26-CBOT",
      "to_contract": "ZTM26-CBOT",
      "decision_session": "2026-03-02",
      "old_volume": 7605,
      "new_volume": 1333819,
      "switch_utc": "2026-03-02T23:00:00+00:00",
      "difference": 0.1484400000000079
    },
    {
      "from_contract": "ZTM26-CBOT",
      "to_contract": "ZTU26-CBOT",
      "decision_session": "2026-06-01",
      "old_volume": 7801,
      "new_volume": 806433,
      "switch_utc": "2026-06-01T22:00:00+00:00",
      "difference": -0.08984000000000947
    },
    {
      "from_contract": "ZTU26-CBOT",
      "to_contract": "ZTZ26-CBOT",
      "decision_session": "2026-08-31",
      "old_volume": 5574,
      "new_volume": 1243576,
      "switch_utc": "2026-08-31T22:00:00+00:00",
      "difference": -0.15233999999999526
    }
  ]
}