{ "schema": "cme.gc.tick.continuous/1", "as_of_utc": "2026-10-26T03:02:05.627572+00:00", "rows": 276344842, "volume": 360129224, "first_utc": "2010-09-13T14:38:00+00:00", "last_utc": "2026-10-26T02:51:19.427000+00:00", "anchor_contract": "GCZ26-COMEX", "adjustments": { "GCZ26-COMEX": 0.0, "GCX26-COMEX": 14.600000000000364, "GCV26-COMEX": 27.300000000000182, "GCU26-COMEX": 43.19999999999982, "GCQ26-COMEX": 54.90000000000009, "GCN26-COMEX": 71.59999999999991, "GCM26-COMEX": 81.59999999999991, "GCK26-COMEX": 98.59999999999991, "GCJ26-COMEX": 112.20000000000027, "GCH26-COMEX": 130.50000000000045, "GCG26-COMEX": 152.30000000000064, "GCF26-COMEX": 168.900000000001, "GCZ25-COMEX": 185.30000000000155, "GCX25-COMEX": 200.00000000000182, "GCV25-COMEX": 220.00000000000182, "GCU25-COMEX": 234.10000000000173, "GCQ25-COMEX": 243.30000000000155, "GCN25-COMEX": 256.50000000000136, "GCM25-COMEX": 266.50000000000136, "GCK25-COMEX": 281.6000000000013, "GCJ25-COMEX": 295.400000000001, "GCH25-COMEX": 308.7000000000007, "GCG25-COMEX": 317.900000000001, "GCF25-COMEX": 329.7000000000012, "GCZ24-COMEX": 341.3000000000011, "GCX24-COMEX": 353.6000000000008, "GCV24-COMEX": 361.900000000001, "GCU24-COMEX": 371.3000000000011, "GCQ24-COMEX": 381.8000000000011, "GCN24-COMEX": 394.2000000000012, "GCM24-COMEX": 405.1000000000013, "GCK24-COMEX": 417.5000000000009, "GCJ24-COMEX": 426.5000000000009, "GCH24-COMEX": 436.400000000001, "GCG24-COMEX": 444.6000000000013, "GCF24-COMEX": 454.5000000000009, "GCZ23-COMEX": 463.400000000001, "GCX23-COMEX": 472.400000000001, "GCV23-COMEX": 481.10000000000105, "GCU23-COMEX": 491.00000000000114, "GCQ23-COMEX": 497.60000000000105, "GCN23-COMEX": 506.400000000001, "GCM23-COMEX": 514.8000000000011, "GCK23-COMEX": 523.900000000001, "GCJ23-COMEX": 528.400000000001, "GCH23-COMEX": 536.400000000001, "GCG23-COMEX": 541.400000000001, "GCF23-COMEX": 548.3000000000011, "GCZ22-COMEX": 555.2000000000012, "GCV22-COMEX": 565.1000000000013, "GCU22-COMEX": 569.0000000000011, "GCQ22-COMEX": 572.900000000001, "GCN22-COMEX": 576.900000000001, "GCM22-COMEX": 577.5000000000009, "GCK22-COMEX": 580.1000000000008, "GCJ22-COMEX": 581.3000000000009, "GCH22-COMEX": 582.7000000000007, "GCG22-COMEX": 584.2000000000007, "GCF22-COMEX": 585.2000000000007, "GCZ21-COMEX": 586.3000000000006, "GCX21-COMEX": 587.3000000000006, "GCV21-COMEX": 587.5000000000007, "GCU21-COMEX": 588.2000000000007, "GCQ21-COMEX": 588.7000000000007, "GCN21-COMEX": 589.6000000000006, "GCM21-COMEX": 590.3000000000004, "GCK21-COMEX": 591.1000000000004, "GCJ21-COMEX": 591.5000000000005, "GCH21-COMEX": 592.5000000000005, "GCG21-COMEX": 594.2000000000005, "GCF21-COMEX": 596.7000000000005, "GCZ20-COMEX": 597.9000000000005, "GCX20-COMEX": 600.6000000000006, "GCV20-COMEX": 604.7000000000005, "GCU20-COMEX": 607.1000000000006, "GCQ20-COMEX": 610.1000000000006, "GCN20-COMEX": 616.6000000000006, "GCM20-COMEX": 622.0000000000005, "GCK20-COMEX": 632.8000000000004, "GCJ20-COMEX": 638.8000000000004, "GCH20-COMEX": 641.7000000000005, "GCG20-COMEX": 643.9000000000005, "GCF20-COMEX": 648.2000000000005, "GCZ19-COMEX": 649.2000000000005, "GCX19-COMEX": 652.7000000000005, "GCV19-COMEX": 655.9000000000005, "GCU19-COMEX": 659.8000000000004, "GCQ19-COMEX": 662.5000000000005, "GCN19-COMEX": 666.4000000000005, "GCM19-COMEX": 668.9000000000005, "GCK19-COMEX": 671.9000000000005, "GCJ19-COMEX": 675.0000000000005, "GCH19-COMEX": 678.0000000000005, "GCG19-COMEX": 680.5000000000005, "GCF19-COMEX": 683.5000000000005, "GCZ18-COMEX": 684.8000000000004, "GCX18-COMEX": 687.9000000000005, "GCV18-COMEX": 688.2000000000005, "GCU18-COMEX": 690.3000000000004, "GCQ18-COMEX": 693.0000000000005, "GCN18-COMEX": 695.0000000000005, "GCM18-COMEX": 697.1000000000004, "GCK18-COMEX": 700.5000000000005, "GCJ18-COMEX": 702.2000000000005, "GCH18-COMEX": 704.7000000000005, "GCG18-COMEX": 705.3000000000006, "GCZ17-COMEX": 709.2000000000005, "GCX17-COMEX": 711.3000000000004, "GCV17-COMEX": 712.9000000000005, "GCU17-COMEX": 714.5000000000007, "GCQ17-COMEX": 716.3000000000006, "GCN17-COMEX": 717.9000000000005, "GCM17-COMEX": 719.1000000000006, "GCK17-COMEX": 721.0000000000005, "GCJ17-COMEX": 721.1000000000004, "GCH17-COMEX": 722.6000000000004, "GCG17-COMEX": 723.1000000000004, "GCF17-COMEX": 724.9000000000005, "GCZ16-COMEX": 726.7000000000005, "GCX16-COMEX": 728.2000000000005, "GCV16-COMEX": 729.7000000000005, "GCU16-COMEX": 731.0000000000005, "GCQ16-COMEX": 731.6000000000006, "GCN16-COMEX": 734.2000000000005, "GCM16-COMEX": 735.6000000000006, "GCK16-COMEX": 736.4000000000005, "GCJ16-COMEX": 736.3000000000004, "GCH16-COMEX": 736.6000000000004, "GCG16-COMEX": 737.0000000000005, "GCF16-COMEX": 736.1000000000004, "GCZ15-COMEX": 735.7000000000003, "GCX15-COMEX": 736.0000000000002, "GCV15-COMEX": 735.7000000000003, "GCU15-COMEX": 736.4000000000003, "GCQ15-COMEX": 735.6000000000004, "GCM15-COMEX": 736.2000000000005, "GCK15-COMEX": 736.5000000000005, "GCJ15-COMEX": 736.5000000000005, "GCH15-COMEX": 737.1000000000004, "GCG15-COMEX": 737.1000000000004, "GCF15-COMEX": 737.5000000000005, "GCZ14-COMEX": 737.4000000000003, "GCX14-COMEX": 737.7000000000005, "GCV14-COMEX": 738.5000000000005, "GCU14-COMEX": 739.2000000000005, "GCQ14-COMEX": 739.1000000000004, "GCM14-COMEX": 740.0000000000005, "GCK14-COMEX": 740.2000000000005, "GCJ14-COMEX": 740.0000000000005, "GCH14-COMEX": 740.0000000000005, "GCG14-COMEX": 739.9000000000005, "GCF14-COMEX": 740.6000000000004, "GCZ13-COMEX": 739.8000000000004, "GCV13-COMEX": 740.1000000000004, "GCQ13-COMEX": 740.2000000000003, "GCM13-COMEX": 740.7000000000003, "GCJ13-COMEX": 741.7000000000003, "GCG13-COMEX": 743.0000000000002, "GCZ12-COMEX": 745.5000000000002, "GCV12-COMEX": 748.2000000000003, "GCQ12-COMEX": 749.3000000000004, "GCM12-COMEX": 751.1000000000004, "GCJ12-COMEX": 754.1000000000004, "GCG12-COMEX": 756.2000000000003, "GCZ11-COMEX": 762.7000000000003, "GCQ11-COMEX": 765.2000000000003, "GCM11-COMEX": 765.8000000000004 }, "files": [ "cme.gc.tick.continuous.2010.parquet", "cme.gc.tick.continuous.2011.parquet", "cme.gc.tick.continuous.2012.parquet", "cme.gc.tick.continuous.2013.parquet", "cme.gc.tick.continuous.2014.parquet", "cme.gc.tick.continuous.2015.parquet", "cme.gc.tick.continuous.2016.parquet", "cme.gc.tick.continuous.2017.parquet", "cme.gc.tick.continuous.2018.parquet", "cme.gc.tick.continuous.2019.parquet", "cme.gc.tick.continuous.2020.parquet", "cme.gc.tick.continuous.2021.parquet", "cme.gc.tick.continuous.2022.parquet", "cme.gc.tick.continuous.2023.parquet", "cme.gc.tick.continuous.2024.parquet", "cme.gc.tick.continuous.2025.parquet", "cme.gc.tick.continuous.2026.parquet" ], "rolls": [ { "from_contract": "GCM11-COMEX", "to_contract": "GCQ11-COMEX", "decision_session": "2011-05-30", "old_volume": 1998, "new_volume": 13146, "switch_utc": "2011-05-30T22:00:00+00:00", "difference": 0.6000000000001364 }, { "from_contract": "GCQ11-COMEX", "to_contract": "GCZ11-COMEX", "decision_session": "2011-08-01", "old_volume": 2800, "new_volume": 126083, "switch_utc": "2011-08-01T22:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCZ11-COMEX", "to_contract": "GCG12-COMEX", "decision_session": "2011-11-29", "old_volume": 53808, "new_volume": 134939, "switch_utc": "2011-11-29T23:00:00+00:00", "difference": 6.5 }, { "from_contract": "GCG12-COMEX", "to_contract": "GCJ12-COMEX", "decision_session": "2012-01-30", "old_volume": 51515, "new_volume": 124688, "switch_utc": "2012-01-30T23:00:00+00:00", "difference": 2.099999999999909 }, { "from_contract": "GCJ12-COMEX", "to_contract": "GCM12-COMEX", "decision_session": "2012-03-29", "old_volume": 45732, "new_volume": 150733, "switch_utc": "2012-03-29T22:00:00+00:00", "difference": 3.0 }, { "from_contract": "GCM12-COMEX", "to_contract": "GCQ12-COMEX", "decision_session": "2012-05-30", "old_volume": 74851, "new_volume": 241830, "switch_utc": "2012-05-30T22:00:00+00:00", "difference": 1.7999999999999545 }, { "from_contract": "GCQ12-COMEX", "to_contract": "GCV12-COMEX", "decision_session": "2012-08-06", "old_volume": 302, "new_volume": 1943, "switch_utc": "2012-08-06T22:00:00+00:00", "difference": 1.1000000000001364 }, { "from_contract": "GCV12-COMEX", "to_contract": "GCZ12-COMEX", "decision_session": "2012-10-01", "old_volume": 379, "new_volume": 178367, "switch_utc": "2012-10-01T22:00:00+00:00", "difference": 2.7000000000000455 }, { "from_contract": "GCZ12-COMEX", "to_contract": "GCG13-COMEX", "decision_session": "2012-11-29", "old_volume": 20094, "new_volume": 128005, "switch_utc": "2012-11-29T23:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCG13-COMEX", "to_contract": "GCJ13-COMEX", "decision_session": "2013-01-30", "old_volume": 19465, "new_volume": 143767, "switch_utc": "2013-01-30T23:00:00+00:00", "difference": 1.2999999999999545 }, { "from_contract": "GCJ13-COMEX", "to_contract": "GCM13-COMEX", "decision_session": "2013-03-27", "old_volume": 17349, "new_volume": 123667, "switch_utc": "2013-03-27T22:00:00+00:00", "difference": 1.0 }, { "from_contract": "GCM13-COMEX", "to_contract": "GCQ13-COMEX", "decision_session": "2013-05-30", "old_volume": 20098, "new_volume": 159830, "switch_utc": "2013-05-30T22:00:00+00:00", "difference": 0.5 }, { "from_contract": "GCQ13-COMEX", "to_contract": "GCV13-COMEX", "decision_session": "2013-07-31", "old_volume": 3594, "new_volume": 7177, "switch_utc": "2013-07-31T22:00:00+00:00", "difference": 0.09999999999990905 }, { "from_contract": "GCV13-COMEX", "to_contract": "GCZ13-COMEX", "decision_session": "2013-09-30", "old_volume": 163, "new_volume": 109425, "switch_utc": "2013-09-30T22:00:00+00:00", "difference": 0.2999999999999545 }, { "from_contract": "GCZ13-COMEX", "to_contract": "GCF14-COMEX", "decision_session": "2013-12-16", "old_volume": 184, "new_volume": 448, "switch_utc": "2013-12-16T23:00:00+00:00", "difference": -0.7999999999999545 }, { "from_contract": "GCF14-COMEX", "to_contract": "GCG14-COMEX", "decision_session": "2013-12-30", "old_volume": 65, "new_volume": 71256, "switch_utc": "2013-12-30T23:00:00+00:00", "difference": 0.6999999999998181 }, { "from_contract": "GCG14-COMEX", "to_contract": "GCH14-COMEX", "decision_session": "2014-02-20", "old_volume": 51, "new_volume": 287, "switch_utc": "2014-02-20T23:00:00+00:00", "difference": -0.09999999999990905 }, { "from_contract": "GCH14-COMEX", "to_contract": "GCJ14-COMEX", "decision_session": "2014-02-24", "old_volume": 391, "new_volume": 114828, "switch_utc": "2014-02-24T23:00:00+00:00", "difference": 0.0 }, { "from_contract": "GCJ14-COMEX", "to_contract": "GCK14-COMEX", "decision_session": "2014-04-24", "old_volume": 57, "new_volume": 297, "switch_utc": "2014-04-24T22:00:00+00:00", "difference": -0.20000000000004547 }, { "from_contract": "GCK14-COMEX", "to_contract": "GCM14-COMEX", "decision_session": "2014-04-28", "old_volume": 144, "new_volume": 90403, "switch_utc": "2014-04-28T22:00:00+00:00", "difference": 0.20000000000004547 }, { "from_contract": "GCM14-COMEX", "to_contract": "GCQ14-COMEX", "decision_session": "2014-05-29", "old_volume": 13448, "new_volume": 110271, "switch_utc": "2014-05-29T22:00:00+00:00", "difference": 0.900000000000091 }, { "from_contract": "GCQ14-COMEX", "to_contract": "GCU14-COMEX", "decision_session": "2014-08-22", "old_volume": 69, "new_volume": 163, "switch_utc": "2014-08-24T22:00:00+00:00", "difference": -0.10000000000013642 }, { "from_contract": "GCU14-COMEX", "to_contract": "GCV14-COMEX", "decision_session": "2014-08-26", "old_volume": 247, "new_volume": 2649, "switch_utc": "2014-08-26T22:00:00+00:00", "difference": 0.7000000000000455 }, { "from_contract": "GCV14-COMEX", "to_contract": "GCX14-COMEX", "decision_session": "2014-10-16", "old_volume": 6, "new_volume": 119, "switch_utc": "2014-10-16T22:00:00+00:00", "difference": 0.7999999999999545 }, { "from_contract": "GCX14-COMEX", "to_contract": "GCZ14-COMEX", "decision_session": "2014-10-27", "old_volume": 101, "new_volume": 67781, "switch_utc": "2014-10-27T22:00:00+00:00", "difference": 0.3000000000001819 }, { "from_contract": "GCZ14-COMEX", "to_contract": "GCF15-COMEX", "decision_session": "2014-12-12", "old_volume": 137, "new_volume": 424, "switch_utc": "2014-12-14T23:00:00+00:00", "difference": -0.10000000000013642 }, { "from_contract": "GCF15-COMEX", "to_contract": "GCG15-COMEX", "decision_session": "2014-12-29", "old_volume": 168, "new_volume": 76276, "switch_utc": "2014-12-29T23:00:00+00:00", "difference": 0.40000000000009095 }, { "from_contract": "GCG15-COMEX", "to_contract": "GCH15-COMEX", "decision_session": "2015-02-20", "old_volume": 49, "new_volume": 789, "switch_utc": "2015-02-22T23:00:00+00:00", "difference": 0.0 }, { "from_contract": "GCH15-COMEX", "to_contract": "GCJ15-COMEX", "decision_session": "2015-02-25", "old_volume": 381, "new_volume": 91205, "switch_utc": "2015-02-25T23:00:00+00:00", "difference": 0.599999999999909 }, { "from_contract": "GCJ15-COMEX", "to_contract": "GCK15-COMEX", "decision_session": "2015-04-07", "old_volume": 314, "new_volume": 359, "switch_utc": "2015-04-07T22:00:00+00:00", "difference": 0.0 }, { "from_contract": "GCK15-COMEX", "to_contract": "GCM15-COMEX", "decision_session": "2015-04-27", "old_volume": 405, "new_volume": 182529, "switch_utc": "2015-04-27T22:00:00+00:00", "difference": 0.2999999999999545 }, { "from_contract": "GCM15-COMEX", "to_contract": "GCQ15-COMEX", "decision_session": "2015-05-28", "old_volume": 20121, "new_volume": 108778, "switch_utc": "2015-05-28T22:00:00+00:00", "difference": 0.6000000000001364 }, { "from_contract": "GCQ15-COMEX", "to_contract": "GCU15-COMEX", "decision_session": "2015-08-17", "old_volume": 112, "new_volume": 682, "switch_utc": "2015-08-17T22:00:00+00:00", "difference": -0.7999999999999545 }, { "from_contract": "GCU15-COMEX", "to_contract": "GCV15-COMEX", "decision_session": "2015-09-01", "old_volume": 144, "new_volume": 2796, "switch_utc": "2015-09-01T22:00:00+00:00", "difference": 0.7000000000000455 }, { "from_contract": "GCV15-COMEX", "to_contract": "GCX15-COMEX", "decision_session": "2015-10-07", "old_volume": 57, "new_volume": 266, "switch_utc": "2015-10-07T22:00:00+00:00", "difference": -0.2999999999999545 }, { "from_contract": "GCX15-COMEX", "to_contract": "GCZ15-COMEX", "decision_session": "2015-10-26", "old_volume": 84, "new_volume": 72865, "switch_utc": "2015-10-26T22:00:00+00:00", "difference": 0.2999999999999545 }, { "from_contract": "GCZ15-COMEX", "to_contract": "GCF16-COMEX", "decision_session": "2015-12-08", "old_volume": 123, "new_volume": 340, "switch_utc": "2015-12-08T23:00:00+00:00", "difference": -0.40000000000009095 }, { "from_contract": "GCF16-COMEX", "to_contract": "GCG16-COMEX", "decision_session": "2015-12-28", "old_volume": 152, "new_volume": 62346, "switch_utc": "2015-12-28T23:00:00+00:00", "difference": -0.900000000000091 }, { "from_contract": "GCG16-COMEX", "to_contract": "GCH16-COMEX", "decision_session": "2016-02-02", "old_volume": 768, "new_volume": 814, "switch_utc": "2016-02-02T23:00:00+00:00", "difference": 0.40000000000009095 }, { "from_contract": "GCH16-COMEX", "to_contract": "GCJ16-COMEX", "decision_session": "2016-02-29", "old_volume": 118, "new_volume": 162240, "switch_utc": "2016-02-29T23:00:00+00:00", "difference": 0.2999999999999545 }, { "from_contract": "GCJ16-COMEX", "to_contract": "GCK16-COMEX", "decision_session": "2016-04-20", "old_volume": 153, "new_volume": 696, "switch_utc": "2016-04-20T22:00:00+00:00", "difference": -0.10000000000013642 }, { "from_contract": "GCK16-COMEX", "to_contract": "GCM16-COMEX", "decision_session": "2016-04-26", "old_volume": 456, "new_volume": 134056, "switch_utc": "2016-04-26T22:00:00+00:00", "difference": 0.7999999999999545 }, { "from_contract": "GCM16-COMEX", "to_contract": "GCN16-COMEX", "decision_session": "2016-06-03", "old_volume": 584, "new_volume": 2939, "switch_utc": "2016-06-05T22:00:00+00:00", "difference": 1.400000000000091 }, { "from_contract": "GCN16-COMEX", "to_contract": "GCQ16-COMEX", "decision_session": "2016-06-27", "old_volume": 1402, "new_volume": 231673, "switch_utc": "2016-06-27T22:00:00+00:00", "difference": 2.599999999999909 }, { "from_contract": "GCQ16-COMEX", "to_contract": "GCU16-COMEX", "decision_session": "2016-08-08", "old_volume": 251, "new_volume": 534, "switch_utc": "2016-08-08T22:00:00+00:00", "difference": 0.6000000000001364 }, { "from_contract": "GCU16-COMEX", "to_contract": "GCV16-COMEX", "decision_session": "2016-08-31", "old_volume": 77, "new_volume": 3147, "switch_utc": "2016-08-31T22:00:00+00:00", "difference": 1.2999999999999545 }, { "from_contract": "GCV16-COMEX", "to_contract": "GCX16-COMEX", "decision_session": "2016-10-05", "old_volume": 75, "new_volume": 415, "switch_utc": "2016-10-05T22:00:00+00:00", "difference": 1.5 }, { "from_contract": "GCX16-COMEX", "to_contract": "GCZ16-COMEX", "decision_session": "2016-10-31", "old_volume": 15, "new_volume": 110292, "switch_utc": "2016-10-31T22:00:00+00:00", "difference": 1.5 }, { "from_contract": "GCZ16-COMEX", "to_contract": "GCF17-COMEX", "decision_session": "2016-11-30", "old_volume": 1738, "new_volume": 2011, "switch_utc": "2016-11-30T23:00:00+00:00", "difference": 1.7999999999999545 }, { "from_contract": "GCF17-COMEX", "to_contract": "GCG17-COMEX", "decision_session": "2016-12-28", "old_volume": 499, "new_volume": 97203, "switch_utc": "2016-12-28T23:00:00+00:00", "difference": 1.800000000000182 }, { "from_contract": "GCG17-COMEX", "to_contract": "GCH17-COMEX", "decision_session": "2017-02-07", "old_volume": 724, "new_volume": 962, "switch_utc": "2017-02-07T23:00:00+00:00", "difference": 0.5 }, { "from_contract": "GCH17-COMEX", "to_contract": "GCJ17-COMEX", "decision_session": "2017-02-27", "old_volume": 200, "new_volume": 196540, "switch_utc": "2017-02-27T23:00:00+00:00", "difference": 1.5 }, { "from_contract": "GCJ17-COMEX", "to_contract": "GCK17-COMEX", "decision_session": "2017-04-24", "old_volume": 177, "new_volume": 655, "switch_utc": "2017-04-24T22:00:00+00:00", "difference": 0.09999999999990905 }, { "from_contract": "GCK17-COMEX", "to_contract": "GCM17-COMEX", "decision_session": "2017-04-25", "old_volume": 1165, "new_volume": 238046, "switch_utc": "2017-04-25T22:00:00+00:00", "difference": 1.8999999999998636 }, { "from_contract": "GCM17-COMEX", "to_contract": "GCN17-COMEX", "decision_session": "2017-06-14", "old_volume": 155, "new_volume": 1145, "switch_utc": "2017-06-14T22:00:00+00:00", "difference": 1.2000000000000455 }, { "from_contract": "GCN17-COMEX", "to_contract": "GCQ17-COMEX", "decision_session": "2017-06-26", "old_volume": 506, "new_volume": 216326, "switch_utc": "2017-06-26T22:00:00+00:00", "difference": 1.599999999999909 }, { "from_contract": "GCQ17-COMEX", "to_contract": "GCU17-COMEX", "decision_session": "2017-08-09", "old_volume": 289, "new_volume": 1123, "switch_utc": "2017-08-09T22:00:00+00:00", "difference": 1.7999999999999545 }, { "from_contract": "GCU17-COMEX", "to_contract": "GCV17-COMEX", "decision_session": "2017-08-31", "old_volume": 215, "new_volume": 5195, "switch_utc": "2017-08-31T22:00:00+00:00", "difference": 1.6000000000001364 }, { "from_contract": "GCV17-COMEX", "to_contract": "GCX17-COMEX", "decision_session": "2017-10-20", "old_volume": 2, "new_volume": 339, "switch_utc": "2017-10-22T22:00:00+00:00", "difference": 1.6000000000001364 }, { "from_contract": "GCX17-COMEX", "to_contract": "GCZ17-COMEX", "decision_session": "2017-10-23", "old_volume": 449, "new_volume": 272267, "switch_utc": "2017-10-23T22:00:00+00:00", "difference": 2.099999999999909 }, { "from_contract": "GCZ17-COMEX", "to_contract": "GCG18-COMEX", "decision_session": "2017-11-29", "old_volume": 16035, "new_volume": 339332, "switch_utc": "2017-11-29T23:00:00+00:00", "difference": 3.8999999999998636 }, { "from_contract": "GCG18-COMEX", "to_contract": "GCH18-COMEX", "decision_session": "2018-02-02", "old_volume": 712, "new_volume": 1479, "switch_utc": "2018-02-04T23:00:00+00:00", "difference": 0.6000000000001364 }, { "from_contract": "GCH18-COMEX", "to_contract": "GCJ18-COMEX", "decision_session": "2018-02-26", "old_volume": 403, "new_volume": 222634, "switch_utc": "2018-02-26T23:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCJ18-COMEX", "to_contract": "GCK18-COMEX", "decision_session": "2018-04-09", "old_volume": 236, "new_volume": 490, "switch_utc": "2018-04-09T22:00:00+00:00", "difference": 1.7000000000000455 }, { "from_contract": "GCK18-COMEX", "to_contract": "GCM18-COMEX", "decision_session": "2018-04-23", "old_volume": 366, "new_volume": 269164, "switch_utc": "2018-04-23T22:00:00+00:00", "difference": 3.400000000000091 }, { "from_contract": "GCM18-COMEX", "to_contract": "GCN18-COMEX", "decision_session": "2018-06-06", "old_volume": 135, "new_volume": 536, "switch_utc": "2018-06-06T22:00:00+00:00", "difference": 2.099999999999909 }, { "from_contract": "GCN18-COMEX", "to_contract": "GCQ18-COMEX", "decision_session": "2018-06-26", "old_volume": 301, "new_volume": 241879, "switch_utc": "2018-06-26T22:00:00+00:00", "difference": 2.0 }, { "from_contract": "GCQ18-COMEX", "to_contract": "GCU18-COMEX", "decision_session": "2018-08-02", "old_volume": 163, "new_volume": 1193, "switch_utc": "2018-08-02T22:00:00+00:00", "difference": 2.7000000000000455 }, { "from_contract": "GCU18-COMEX", "to_contract": "GCV18-COMEX", "decision_session": "2018-08-27", "old_volume": 456, "new_volume": 2704, "switch_utc": "2018-08-27T22:00:00+00:00", "difference": 2.099999999999909 }, { "from_contract": "GCV18-COMEX", "to_contract": "GCX18-COMEX", "decision_session": "2018-10-24", "old_volume": 31, "new_volume": 341, "switch_utc": "2018-10-24T22:00:00+00:00", "difference": 0.2999999999999545 }, { "from_contract": "GCX18-COMEX", "to_contract": "GCZ18-COMEX", "decision_session": "2018-10-29", "old_volume": 179, "new_volume": 221034, "switch_utc": "2018-10-29T22:00:00+00:00", "difference": 3.1000000000001364 }, { "from_contract": "GCZ18-COMEX", "to_contract": "GCF19-COMEX", "decision_session": "2018-12-07", "old_volume": 129, "new_volume": 472, "switch_utc": "2018-12-09T23:00:00+00:00", "difference": 1.2999999999999545 }, { "from_contract": "GCF19-COMEX", "to_contract": "GCG19-COMEX", "decision_session": "2018-12-31", "old_volume": 9, "new_volume": 100037, "switch_utc": "2018-12-31T23:00:00+00:00", "difference": 3.0 }, { "from_contract": "GCG19-COMEX", "to_contract": "GCH19-COMEX", "decision_session": "2019-02-06", "old_volume": 79, "new_volume": 522, "switch_utc": "2019-02-06T23:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCH19-COMEX", "to_contract": "GCJ19-COMEX", "decision_session": "2019-02-25", "old_volume": 356, "new_volume": 173591, "switch_utc": "2019-02-25T23:00:00+00:00", "difference": 3.0 }, { "from_contract": "GCJ19-COMEX", "to_contract": "GCK19-COMEX", "decision_session": "2019-04-01", "old_volume": 148, "new_volume": 1344, "switch_utc": "2019-04-01T22:00:00+00:00", "difference": 3.099999999999909 }, { "from_contract": "GCK19-COMEX", "to_contract": "GCM19-COMEX", "decision_session": "2019-04-17", "old_volume": 361, "new_volume": 206992, "switch_utc": "2019-04-17T22:00:00+00:00", "difference": 3.0 }, { "from_contract": "GCM19-COMEX", "to_contract": "GCN19-COMEX", "decision_session": "2019-06-03", "old_volume": 690, "new_volume": 825, "switch_utc": "2019-06-03T22:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCN19-COMEX", "to_contract": "GCQ19-COMEX", "decision_session": "2019-06-26", "old_volume": 1095, "new_volume": 406980, "switch_utc": "2019-06-26T22:00:00+00:00", "difference": 3.900000000000091 }, { "from_contract": "GCQ19-COMEX", "to_contract": "GCU19-COMEX", "decision_session": "2019-08-02", "old_volume": 288, "new_volume": 3174, "switch_utc": "2019-08-04T22:00:00+00:00", "difference": 2.7000000000000455 }, { "from_contract": "GCU19-COMEX", "to_contract": "GCV19-COMEX", "decision_session": "2019-08-26", "old_volume": 1770, "new_volume": 8522, "switch_utc": "2019-08-26T22:00:00+00:00", "difference": 3.8999999999998636 }, { "from_contract": "GCV19-COMEX", "to_contract": "GCX19-COMEX", "decision_session": "2019-10-01", "old_volume": 189, "new_volume": 1138, "switch_utc": "2019-10-01T22:00:00+00:00", "difference": 3.2000000000000455 }, { "from_contract": "GCX19-COMEX", "to_contract": "GCZ19-COMEX", "decision_session": "2019-10-28", "old_volume": 132, "new_volume": 307106, "switch_utc": "2019-10-28T22:00:00+00:00", "difference": 3.5 }, { "from_contract": "GCZ19-COMEX", "to_contract": "GCF20-COMEX", "decision_session": "2019-12-24", "old_volume": 30, "new_volume": 318, "switch_utc": "2019-12-24T23:00:00+00:00", "difference": 1.0 }, { "from_contract": "GCF20-COMEX", "to_contract": "GCG20-COMEX", "decision_session": "2019-12-30", "old_volume": 225, "new_volume": 164213, "switch_utc": "2019-12-30T23:00:00+00:00", "difference": 4.2999999999999545 }, { "from_contract": "GCG20-COMEX", "to_contract": "GCH20-COMEX", "decision_session": "2020-02-04", "old_volume": 314, "new_volume": 1724, "switch_utc": "2020-02-04T23:00:00+00:00", "difference": 2.2000000000000455 }, { "from_contract": "GCH20-COMEX", "to_contract": "GCJ20-COMEX", "decision_session": "2020-02-25", "old_volume": 1943, "new_volume": 639038, "switch_utc": "2020-02-25T23:00:00+00:00", "difference": 2.900000000000091 }, { "from_contract": "GCJ20-COMEX", "to_contract": "GCK20-COMEX", "decision_session": "2020-04-08", "old_volume": 256, "new_volume": 379, "switch_utc": "2020-04-08T22:00:00+00:00", "difference": 6.0 }, { "from_contract": "GCK20-COMEX", "to_contract": "GCM20-COMEX", "decision_session": "2020-04-27", "old_volume": 475, "new_volume": 135379, "switch_utc": "2020-04-27T22:00:00+00:00", "difference": 10.799999999999955 }, { "from_contract": "GCM20-COMEX", "to_contract": "GCN20-COMEX", "decision_session": "2020-06-01", "old_volume": 382, "new_volume": 571, "switch_utc": "2020-06-01T22:00:00+00:00", "difference": 5.399999999999864 }, { "from_contract": "GCN20-COMEX", "to_contract": "GCQ20-COMEX", "decision_session": "2020-06-29", "old_volume": 40, "new_volume": 125204, "switch_utc": "2020-06-29T22:00:00+00:00", "difference": 6.5 }, { "from_contract": "GCQ20-COMEX", "to_contract": "GCU20-COMEX", "decision_session": "2020-07-31", "old_volume": 1490, "new_volume": 3906, "switch_utc": "2020-08-02T22:00:00+00:00", "difference": 3.0 }, { "from_contract": "GCU20-COMEX", "to_contract": "GCV20-COMEX", "decision_session": "2020-08-26", "old_volume": 894, "new_volume": 11943, "switch_utc": "2020-08-26T22:00:00+00:00", "difference": 2.400000000000091 }, { "from_contract": "GCV20-COMEX", "to_contract": "GCX20-COMEX", "decision_session": "2020-09-30", "old_volume": 101, "new_volume": 393, "switch_utc": "2020-09-30T22:00:00+00:00", "difference": 4.099999999999909 }, { "from_contract": "GCX20-COMEX", "to_contract": "GCZ20-COMEX", "decision_session": "2020-10-26", "old_volume": 132, "new_volume": 159190, "switch_utc": "2020-10-26T22:00:00+00:00", "difference": 2.7000000000000455 }, { "from_contract": "GCZ20-COMEX", "to_contract": "GCF21-COMEX", "decision_session": "2020-12-03", "old_volume": 118, "new_volume": 1214, "switch_utc": "2020-12-03T23:00:00+00:00", "difference": 1.2000000000000455 }, { "from_contract": "GCF21-COMEX", "to_contract": "GCG21-COMEX", "decision_session": "2020-12-28", "old_volume": 1028, "new_volume": 192010, "switch_utc": "2020-12-28T23:00:00+00:00", "difference": 2.5 }, { "from_contract": "GCG21-COMEX", "to_contract": "GCH21-COMEX", "decision_session": "2021-02-01", "old_volume": 693, "new_volume": 1656, "switch_utc": "2021-02-01T23:00:00+00:00", "difference": 1.7000000000000455 }, { "from_contract": "GCH21-COMEX", "to_contract": "GCJ21-COMEX", "decision_session": "2021-02-24", "old_volume": 487, "new_volume": 216169, "switch_utc": "2021-02-24T23:00:00+00:00", "difference": 1.0 }, { "from_contract": "GCJ21-COMEX", "to_contract": "GCK21-COMEX", "decision_session": "2021-04-14", "old_volume": 25, "new_volume": 245, "switch_utc": "2021-04-14T22:00:00+00:00", "difference": 0.40000000000009095 }, { "from_contract": "GCK21-COMEX", "to_contract": "GCM21-COMEX", "decision_session": "2021-04-26", "old_volume": 312, "new_volume": 132894, "switch_utc": "2021-04-26T22:00:00+00:00", "difference": 0.7999999999999545 }, { "from_contract": "GCM21-COMEX", "to_contract": "GCN21-COMEX", "decision_session": "2021-06-07", "old_volume": 73, "new_volume": 514, "switch_utc": "2021-06-07T22:00:00+00:00", "difference": 0.6999999999998181 }, { "from_contract": "GCN21-COMEX", "to_contract": "GCQ21-COMEX", "decision_session": "2021-06-28", "old_volume": 391, "new_volume": 155757, "switch_utc": "2021-06-28T22:00:00+00:00", "difference": 0.8999999999998636 }, { "from_contract": "GCQ21-COMEX", "to_contract": "GCU21-COMEX", "decision_session": "2021-08-05", "old_volume": 172, "new_volume": 624, "switch_utc": "2021-08-05T22:00:00+00:00", "difference": 0.5 }, { "from_contract": "GCU21-COMEX", "to_contract": "GCV21-COMEX", "decision_session": "2021-08-31", "old_volume": 26, "new_volume": 2329, "switch_utc": "2021-08-31T22:00:00+00:00", "difference": 0.7000000000000455 }, { "from_contract": "GCV21-COMEX", "to_contract": "GCX21-COMEX", "decision_session": "2021-10-12", "old_volume": 134, "new_volume": 403, "switch_utc": "2021-10-12T22:00:00+00:00", "difference": 0.20000000000004547 }, { "from_contract": "GCX21-COMEX", "to_contract": "GCZ21-COMEX", "decision_session": "2021-10-26", "old_volume": 105, "new_volume": 193527, "switch_utc": "2021-10-26T22:00:00+00:00", "difference": 1.0 }, { "from_contract": "GCZ21-COMEX", "to_contract": "GCF22-COMEX", "decision_session": "2021-12-15", "old_volume": 72, "new_volume": 761, "switch_utc": "2021-12-15T23:00:00+00:00", "difference": 1.099999999999909 }, { "from_contract": "GCF22-COMEX", "to_contract": "GCG22-COMEX", "decision_session": "2021-12-27", "old_volume": 995, "new_volume": 79154, "switch_utc": "2021-12-27T23:00:00+00:00", "difference": 1.0 }, { "from_contract": "GCG22-COMEX", "to_contract": "GCH22-COMEX", "decision_session": "2022-01-31", "old_volume": 562, "new_volume": 827, "switch_utc": "2022-01-31T23:00:00+00:00", "difference": 1.5 }, { "from_contract": "GCH22-COMEX", "to_contract": "GCJ22-COMEX", "decision_session": "2022-02-28", "old_volume": 262, "new_volume": 236397, "switch_utc": "2022-02-28T23:00:00+00:00", "difference": 1.3999999999998636 }, { "from_contract": "GCJ22-COMEX", "to_contract": "GCK22-COMEX", "decision_session": "2022-04-12", "old_volume": 76, "new_volume": 966, "switch_utc": "2022-04-12T22:00:00+00:00", "difference": 1.2000000000000455 }, { "from_contract": "GCK22-COMEX", "to_contract": "GCM22-COMEX", "decision_session": "2022-04-26", "old_volume": 348, "new_volume": 152733, "switch_utc": "2022-04-26T22:00:00+00:00", "difference": 2.599999999999909 }, { "from_contract": "GCM22-COMEX", "to_contract": "GCN22-COMEX", "decision_session": "2022-06-23", "old_volume": 4, "new_volume": 183, "switch_utc": "2022-06-23T22:00:00+00:00", "difference": 0.599999999999909 }, { "from_contract": "GCN22-COMEX", "to_contract": "GCQ22-COMEX", "decision_session": "2022-06-27", "old_volume": 385, "new_volume": 128770, "switch_utc": "2022-06-27T22:00:00+00:00", "difference": 4.0 }, { "from_contract": "GCQ22-COMEX", "to_contract": "GCU22-COMEX", "decision_session": "2022-08-01", "old_volume": 340, "new_volume": 752, "switch_utc": "2022-08-01T22:00:00+00:00", "difference": 3.8999999999998636 }, { "from_contract": "GCU22-COMEX", "to_contract": "GCV22-COMEX", "decision_session": "2022-08-30", "old_volume": 130, "new_volume": 3536, "switch_utc": "2022-08-30T22:00:00+00:00", "difference": 3.8999999999998636 }, { "from_contract": "GCV22-COMEX", "to_contract": "GCZ22-COMEX", "decision_session": "2022-09-26", "old_volume": 3039, "new_volume": 202947, "switch_utc": "2022-09-26T22:00:00+00:00", "difference": 9.900000000000091 }, { "from_contract": "GCZ22-COMEX", "to_contract": "GCF23-COMEX", "decision_session": "2022-12-01", "old_volume": 883, "new_volume": 1145, "switch_utc": "2022-12-01T23:00:00+00:00", "difference": 6.900000000000091 }, { "from_contract": "GCF23-COMEX", "to_contract": "GCG23-COMEX", "decision_session": "2022-12-27", "old_volume": 175, "new_volume": 153928, "switch_utc": "2022-12-27T23:00:00+00:00", "difference": 6.900000000000091 }, { "from_contract": "GCG23-COMEX", "to_contract": "GCH23-COMEX", "decision_session": "2023-02-03", "old_volume": 705, "new_volume": 2197, "switch_utc": "2023-02-05T23:00:00+00:00", "difference": 5.0 }, { "from_contract": "GCH23-COMEX", "to_contract": "GCJ23-COMEX", "decision_session": "2023-02-27", "old_volume": 105, "new_volume": 118679, "switch_utc": "2023-02-27T23:00:00+00:00", "difference": 8.0 }, { "from_contract": "GCJ23-COMEX", "to_contract": "GCK23-COMEX", "decision_session": "2023-04-14", "old_volume": 185, "new_volume": 878, "switch_utc": "2023-04-16T22:00:00+00:00", "difference": 4.5 }, { "from_contract": "GCK23-COMEX", "to_contract": "GCM23-COMEX", "decision_session": "2023-04-26", "old_volume": 303, "new_volume": 222241, "switch_utc": "2023-04-26T22:00:00+00:00", "difference": 9.099999999999909 }, { "from_contract": "GCM23-COMEX", "to_contract": "GCN23-COMEX", "decision_session": "2023-06-01", "old_volume": 429, "new_volume": 745, "switch_utc": "2023-06-01T22:00:00+00:00", "difference": 8.400000000000091 }, { "from_contract": "GCN23-COMEX", "to_contract": "GCQ23-COMEX", "decision_session": "2023-06-26", "old_volume": 319, "new_volume": 139106, "switch_utc": "2023-06-26T22:00:00+00:00", "difference": 8.799999999999955 }, { "from_contract": "GCQ23-COMEX", "to_contract": "GCU23-COMEX", "decision_session": "2023-08-09", "old_volume": 274, "new_volume": 586, "switch_utc": "2023-08-09T22:00:00+00:00", "difference": 6.599999999999909 }, { "from_contract": "GCU23-COMEX", "to_contract": "GCV23-COMEX", "decision_session": "2023-08-28", "old_volume": 247, "new_volume": 4326, "switch_utc": "2023-08-28T22:00:00+00:00", "difference": 9.900000000000091 }, { "from_contract": "GCV23-COMEX", "to_contract": "GCX23-COMEX", "decision_session": "2023-09-29", "old_volume": 348, "new_volume": 707, "switch_utc": "2023-10-01T22:00:00+00:00", "difference": 8.700000000000045 }, { "from_contract": "GCX23-COMEX", "to_contract": "GCZ23-COMEX", "decision_session": "2023-10-30", "old_volume": 42, "new_volume": 173226, "switch_utc": "2023-10-30T22:00:00+00:00", "difference": 9.0 }, { "from_contract": "GCZ23-COMEX", "to_contract": "GCF24-COMEX", "decision_session": "2023-12-04", "old_volume": 515, "new_volume": 2089, "switch_utc": "2023-12-04T23:00:00+00:00", "difference": 8.900000000000091 }, { "from_contract": "GCF24-COMEX", "to_contract": "GCG24-COMEX", "decision_session": "2023-12-27", "old_volume": 336, "new_volume": 121340, "switch_utc": "2023-12-27T23:00:00+00:00", "difference": 9.899999999999636 }, { "from_contract": "GCG24-COMEX", "to_contract": "GCH24-COMEX", "decision_session": "2024-02-01", "old_volume": 435, "new_volume": 1153, "switch_utc": "2024-02-01T23:00:00+00:00", "difference": 8.200000000000273 }, { "from_contract": "GCH24-COMEX", "to_contract": "GCJ24-COMEX", "decision_session": "2024-02-26", "old_volume": 508, "new_volume": 122453, "switch_utc": "2024-02-26T23:00:00+00:00", "difference": 9.900000000000091 }, { "from_contract": "GCJ24-COMEX", "to_contract": "GCK24-COMEX", "decision_session": "2024-04-01", "old_volume": 280, "new_volume": 1088, "switch_utc": "2024-04-01T22:00:00+00:00", "difference": 9.0 }, { "from_contract": "GCK24-COMEX", "to_contract": "GCM24-COMEX", "decision_session": "2024-04-29", "old_volume": 167, "new_volume": 173422, "switch_utc": "2024-04-29T22:00:00+00:00", "difference": 12.399999999999636 }, { "from_contract": "GCM24-COMEX", "to_contract": "GCN24-COMEX", "decision_session": "2024-05-31", "old_volume": 516, "new_volume": 1011, "switch_utc": "2024-06-02T22:00:00+00:00", "difference": 10.900000000000091 }, { "from_contract": "GCN24-COMEX", "to_contract": "GCQ24-COMEX", "decision_session": "2024-06-26", "old_volume": 681, "new_volume": 178610, "switch_utc": "2024-06-26T22:00:00+00:00", "difference": 12.400000000000091 }, { "from_contract": "GCQ24-COMEX", "to_contract": "GCU24-COMEX", "decision_session": "2024-08-05", "old_volume": 131, "new_volume": 815, "switch_utc": "2024-08-05T22:00:00+00:00", "difference": 10.5 }, { "from_contract": "GCU24-COMEX", "to_contract": "GCV24-COMEX", "decision_session": "2024-09-04", "old_volume": 13, "new_volume": 3427, "switch_utc": "2024-09-04T22:00:00+00:00", "difference": 9.400000000000091 }, { "from_contract": "GCV24-COMEX", "to_contract": "GCX24-COMEX", "decision_session": "2024-10-08", "old_volume": 26, "new_volume": 775, "switch_utc": "2024-10-08T22:00:00+00:00", "difference": 8.300000000000182 }, { "from_contract": "GCX24-COMEX", "to_contract": "GCZ24-COMEX", "decision_session": "2024-10-28", "old_volume": 222, "new_volume": 148911, "switch_utc": "2024-10-28T22:00:00+00:00", "difference": 12.299999999999727 }, { "from_contract": "GCZ24-COMEX", "to_contract": "GCF25-COMEX", "decision_session": "2024-12-02", "old_volume": 209, "new_volume": 906, "switch_utc": "2024-12-02T23:00:00+00:00", "difference": 11.599999999999909 }, { "from_contract": "GCF25-COMEX", "to_contract": "GCG25-COMEX", "decision_session": "2024-12-30", "old_volume": 559, "new_volume": 98739, "switch_utc": "2024-12-30T23:00:00+00:00", "difference": 11.800000000000182 }, { "from_contract": "GCG25-COMEX", "to_contract": "GCH25-COMEX", "decision_session": "2025-02-04", "old_volume": 977, "new_volume": 1381, "switch_utc": "2025-02-04T23:00:00+00:00", "difference": 9.200000000000273 }, { "from_contract": "GCH25-COMEX", "to_contract": "GCJ25-COMEX", "decision_session": "2025-02-25", "old_volume": 1661, "new_volume": 218779, "switch_utc": "2025-02-25T23:00:00+00:00", "difference": 13.299999999999727 }, { "from_contract": "GCJ25-COMEX", "to_contract": "GCK25-COMEX", "decision_session": "2025-04-02", "old_volume": 677, "new_volume": 811, "switch_utc": "2025-04-02T22:00:00+00:00", "difference": 13.799999999999727 }, { "from_contract": "GCK25-COMEX", "to_contract": "GCM25-COMEX", "decision_session": "2025-04-28", "old_volume": 539, "new_volume": 209675, "switch_utc": "2025-04-28T22:00:00+00:00", "difference": 15.099999999999909 }, { "from_contract": "GCM25-COMEX", "to_contract": "GCN25-COMEX", "decision_session": "2025-06-04", "old_volume": 125, "new_volume": 1154, "switch_utc": "2025-06-04T22:00:00+00:00", "difference": 10.0 }, { "from_contract": "GCN25-COMEX", "to_contract": "GCQ25-COMEX", "decision_session": "2025-06-30", "old_volume": 292, "new_volume": 138484, "switch_utc": "2025-06-30T22:00:00+00:00", "difference": 13.199999999999818 }, { "from_contract": "GCQ25-COMEX", "to_contract": "GCU25-COMEX", "decision_session": "2025-08-07", "old_volume": 212, "new_volume": 1873, "switch_utc": "2025-08-07T22:00:00+00:00", "difference": 9.199999999999818 }, { "from_contract": "GCU25-COMEX", "to_contract": "GCV25-COMEX", "decision_session": "2025-08-26", "old_volume": 716, "new_volume": 5488, "switch_utc": "2025-08-26T22:00:00+00:00", "difference": 14.099999999999909 }, { "from_contract": "GCV25-COMEX", "to_contract": "GCX25-COMEX", "decision_session": "2025-10-08", "old_volume": 226, "new_volume": 1265, "switch_utc": "2025-10-08T22:00:00+00:00", "difference": 20.0 }, { "from_contract": "GCX25-COMEX", "to_contract": "GCZ25-COMEX", "decision_session": "2025-10-27", "old_volume": 1244, "new_volume": 315127, "switch_utc": "2025-10-27T22:00:00+00:00", "difference": 14.700000000000273 }, { "from_contract": "GCZ25-COMEX", "to_contract": "GCF26-COMEX", "decision_session": "2025-12-03", "old_volume": 85, "new_volume": 1091, "switch_utc": "2025-12-03T23:00:00+00:00", "difference": 16.400000000000546 }, { "from_contract": "GCF26-COMEX", "to_contract": "GCG26-COMEX", "decision_session": "2025-12-29", "old_volume": 1038, "new_volume": 299475, "switch_utc": "2025-12-29T23:00:00+00:00", "difference": 16.600000000000364 }, { "from_contract": "GCG26-COMEX", "to_contract": "GCH26-COMEX", "decision_session": "2026-01-29", "old_volume": 10732, "new_volume": 11274, "switch_utc": "2026-01-29T23:00:00+00:00", "difference": 21.800000000000182 }, { "from_contract": "GCH26-COMEX", "to_contract": "GCJ26-COMEX", "decision_session": "2026-02-24", "old_volume": 626, "new_volume": 133592, "switch_utc": "2026-02-24T23:00:00+00:00", "difference": 18.300000000000182 }, { "from_contract": "GCJ26-COMEX", "to_contract": "GCK26-COMEX", "decision_session": "2026-03-31", "old_volume": 867, "new_volume": 2559, "switch_utc": "2026-03-31T22:00:00+00:00", "difference": 13.600000000000364 }, { "from_contract": "GCK26-COMEX", "to_contract": "GCM26-COMEX", "decision_session": "2026-04-27", "old_volume": 561, "new_volume": 78068, "switch_utc": "2026-04-27T22:00:00+00:00", "difference": 17.0 }, { "from_contract": "GCM26-COMEX", "to_contract": "GCN26-COMEX", "decision_session": "2026-06-10", "old_volume": 68, "new_volume": 1688, "switch_utc": "2026-06-10T22:00:00+00:00", "difference": 10.0 }, { "from_contract": "GCN26-COMEX", "to_contract": "GCQ26-COMEX", "decision_session": "2026-06-29", "old_volume": 76, "new_volume": 98338, "switch_utc": "2026-06-29T22:00:00+00:00", "difference": 16.699999999999818 }, { "from_contract": "GCQ26-COMEX", "to_contract": "GCU26-COMEX", "decision_session": "2026-08-04", "old_volume": 116, "new_volume": 1085, "switch_utc": "2026-08-04T22:00:00+00:00", "difference": 11.700000000000273 }, { "from_contract": "GCU26-COMEX", "to_contract": "GCV26-COMEX", "decision_session": "2026-08-26", "old_volume": 1094, "new_volume": 9741, "switch_utc": "2026-08-26T22:00:00+00:00", "difference": 15.899999999999636 }, { "from_contract": "GCV26-COMEX", "to_contract": "GCX26-COMEX", "decision_session": "2026-10-07", "old_volume": 216, "new_volume": 1140, "switch_utc": "2026-10-07T22:00:00+00:00", "difference": 12.699999999999818 }, { "from_contract": "GCX26-COMEX", "to_contract": "GCZ26-COMEX", "decision_session": "2026-10-21", "old_volume": 346, "new_volume": 135048, "switch_utc": "2026-10-21T22:00:00+00:00", "difference": 14.600000000000364 } ] }