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      "decision_session": "2020-03-31",
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      "difference": -9.599999999999994
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    {
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      "decision_session": "2020-06-01",
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      "difference": 0.7749999999999915
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    {
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      "decision_session": "2020-08-03",
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      "difference": 5.125
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    {
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      "decision_session": "2020-09-30",
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      "difference": 3.7749999999999915
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    {
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      "decision_session": "2020-12-01",
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      "difference": 2.549999999999997
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      "decision_session": "2021-01-27",
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      "difference": 6.199999999999989
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    {
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      "decision_session": "2021-03-31",
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      "difference": 1.6499999999999915
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    {
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      "decision_session": "2021-06-01",
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      "difference": 2.9749999999999943
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      "difference": 5.25
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      "difference": 2.5
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      "difference": 4.975000000000023
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      "decision_session": "2022-03-30",
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      "difference": -2.125
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    {
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      "decision_session": "2022-05-31",
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      "switch_utc": "2022-05-31T22:00:00+00:00",
      "difference": -0.17499999999998295
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    {
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      "decision_session": "2022-08-01",
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      "difference": 5.725000000000023
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      "difference": 3.6500000000000057
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    {
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      "decision_session": "2022-11-30",
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      "difference": 2.5999999999999943
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      "decision_session": "2023-01-30",
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      "switch_utc": "2023-01-30T23:00:00+00:00",
      "difference": 4.5
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    {
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      "decision_session": "2023-03-29",
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      "switch_utc": "2023-03-29T22:00:00+00:00",
      "difference": -6.125
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    {
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      "decision_session": "2023-05-31",
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      "switch_utc": "2023-05-31T22:00:00+00:00",
      "difference": -1.5250000000000057
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    {
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      "decision_session": "2023-08-01",
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      "switch_utc": "2023-08-01T22:00:00+00:00",
      "difference": 2.3000000000000114
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    {
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      "decision_session": "2023-10-02",
      "old_volume": 6433,
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      "switch_utc": "2023-10-02T22:00:00+00:00",
      "difference": 3.9749999999999943
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    {
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      "decision_session": "2023-11-29",
      "old_volume": 3211,
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      "switch_utc": "2023-11-29T23:00:00+00:00",
      "difference": 1.549999999999983
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    {
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      "decision_session": "2024-01-30",
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      "switch_utc": "2024-01-30T23:00:00+00:00",
      "difference": 3.75
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    {
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      "decision_session": "2024-04-01",
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      "switch_utc": "2024-04-01T22:00:00+00:00",
      "difference": -4.775000000000006
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    {
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      "decision_session": "2024-05-29",
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      "difference": -3.1500000000000057
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    {
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      "decision_session": "2024-07-31",
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      "switch_utc": "2024-07-31T22:00:00+00:00",
      "difference": -0.5
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    {
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      "to_contract": "LEZ24-CME",
      "decision_session": "2024-10-01",
      "old_volume": 4713,
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      "switch_utc": "2024-10-01T22:00:00+00:00",
      "difference": 0.549999999999983
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    {
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      "to_contract": "LEG25-CME",
      "decision_session": "2024-12-02",
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      "switch_utc": "2024-12-02T23:00:00+00:00",
      "difference": 0.4000000000000057
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    {
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      "to_contract": "LEJ25-CME",
      "decision_session": "2025-01-29",
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      "switch_utc": "2025-01-29T23:00:00+00:00",
      "difference": -2.0500000000000114
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    {
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      "decision_session": "2025-03-31",
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      "switch_utc": "2025-03-31T22:00:00+00:00",
      "difference": -4.150000000000006
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    {
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      "to_contract": "LEQ25-CME",
      "decision_session": "2025-06-02",
      "old_volume": 6724,
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      "switch_utc": "2025-06-02T22:00:00+00:00",
      "difference": -5.625
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    {
      "from_contract": "LEQ25-CME",
      "to_contract": "LEV25-CME",
      "decision_session": "2025-07-30",
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      "switch_utc": "2025-07-30T22:00:00+00:00",
      "difference": -3.299999999999983
    },
    {
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      "to_contract": "LEZ25-CME",
      "decision_session": "2025-10-01",
      "old_volume": 7303,
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      "switch_utc": "2025-10-01T22:00:00+00:00",
      "difference": 3.3249999999999886
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    {
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      "to_contract": "LEG26-CME",
      "decision_session": "2025-12-01",
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      "new_volume": 15854,
      "switch_utc": "2025-12-01T23:00:00+00:00",
      "difference": 1.6000000000000227
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    {
      "from_contract": "LEG26-CME",
      "to_contract": "LEJ26-CME",
      "decision_session": "2026-01-28",
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      "new_volume": 13812,
      "switch_utc": "2026-01-28T23:00:00+00:00",
      "difference": 1.8499999999999943
    },
    {
      "from_contract": "LEJ26-CME",
      "to_contract": "LEM26-CME",
      "decision_session": "2026-03-31",
      "old_volume": 7133,
      "new_volume": 20319,
      "switch_utc": "2026-03-31T22:00:00+00:00",
      "difference": 0.125
    },
    {
      "from_contract": "LEM26-CME",
      "to_contract": "LEQ26-CME",
      "decision_session": "2026-06-01",
      "old_volume": 4108,
      "new_volume": 11025,
      "switch_utc": "2026-06-01T22:00:00+00:00",
      "difference": -8.474999999999994
    },
    {
      "from_contract": "LEQ26-CME",
      "to_contract": "LEV26-CME",
      "decision_session": "2026-08-03",
      "old_volume": 8421,
      "new_volume": 17186,
      "switch_utc": "2026-08-03T22:00:00+00:00",
      "difference": -4.375
    },
    {
      "from_contract": "LEV26-CME",
      "to_contract": "LEZ26-CME",
      "decision_session": "2026-09-16",
      "old_volume": 6437,
      "new_volume": 14550,
      "switch_utc": "2026-09-16T22:00:00+00:00",
      "difference": 1.674999999999983
    }
  ]
}