{
  "experiment": "expB_artifact_baselines",
  "run_utc": "2026-08-12T05:56:02.079317+00:00",
  "author": "Simon-Pierre Boucher",
  "contact": "contact@spboucher.ai",
  "data_source": "hfmarketdata.io",
  "protocol": {
    "window": [
      "2024-01-02",
      "2024-04-01"
    ],
    "adjustment": "adj_split",
    "rth": "09:30-16:00",
    "liquid": [
      "AAPL",
      "MSFT",
      "NVDA",
      "AMZN",
      "GOOGL",
      "META",
      "TSLA",
      "JPM",
      "XOM",
      "UNH",
      "SPY",
      "QQQ"
    ],
    "random_universe": [
      "ATRO",
      "AUVI",
      "AXDX",
      "BKE",
      "CECO",
      "CKX",
      "GCL",
      "GRO",
      "HPE",
      "HTD",
      "HWM",
      "ICUI",
      "KEY.K",
      "KSPI",
      "LENZ",
      "LTSL",
      "NSTS",
      "NWAX",
      "PBYI",
      "PLNT",
      "PSA.G",
      "RDZN",
      "RITM.B",
      "RPM",
      "RUM",
      "SLF",
      "SPB",
      "STRRP",
      "USGOW",
      "WTFCM"
    ],
    "random_seed": 42,
    "boot": [
      300,
      42
    ],
    "confidence_level": 0,
    "note": "artifact NULL levels \u2014 descriptive, in-sample by design"
  },
  "per_ticker": {
    "AAPL": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": 0.00162,
      "ac1_ci95": [
        -0.01747,
        0.02147
      ],
      "roll_rel_spread": null,
      "vr5": 1.011,
      "vr30": 1.0477,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00528,
        "-2": -0.0079,
        "-1": 0.00678,
        "0": 0.53789,
        "1": 0.01237,
        "2": -0.00536,
        "3": -0.00986
      },
      "spy_leads_+1": 0.01237
    },
    "MSFT": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.01245,
      "ac1_ci95": [
        -0.04532,
        0.01955
      ],
      "roll_rel_spread": 0.000111,
      "vr5": 0.9523,
      "vr30": 0.9179,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.0054,
        "-2": 0.00084,
        "-1": 0.00872,
        "0": 0.59532,
        "1": 0.00645,
        "2": -0.00534,
        "3": -0.00479
      },
      "spy_leads_+1": 0.00645
    },
    "NVDA": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": 0.01298,
      "ac1_ci95": [
        -0.01676,
        0.04068
      ],
      "roll_rel_spread": null,
      "vr5": 0.9979,
      "vr30": 0.9733,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00212,
        "-2": 0.01372,
        "-1": 0.02509,
        "0": 0.53888,
        "1": 0.00859,
        "2": -0.01068,
        "3": -0.01252
      },
      "spy_leads_+1": 0.00859
    },
    "AMZN": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.00916,
      "ac1_ci95": [
        -0.03589,
        0.01421
      ],
      "roll_rel_spread": 0.000117,
      "vr5": 0.946,
      "vr30": 0.8658,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.01025,
        "-2": -0.00672,
        "-1": 0.00274,
        "0": 0.5434,
        "1": 0.0037,
        "2": -0.00722,
        "3": 0.01063
      },
      "spy_leads_+1": 0.0037
    },
    "GOOGL": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.02624,
      "ac1_ci95": [
        -0.06462,
        0.01378
      ],
      "roll_rel_spread": 0.000196,
      "vr5": 0.9769,
      "vr30": 0.9116,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00045,
        "-2": -0.00117,
        "-1": -0.00146,
        "0": 0.4932,
        "1": -0.00674,
        "2": -0.00411,
        "3": 0.00345
      },
      "spy_leads_+1": -0.00674
    },
    "META": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.02418,
      "ac1_ci95": [
        -0.05678,
        0.0063
      ],
      "roll_rel_spread": 0.000244,
      "vr5": 0.9732,
      "vr30": 0.9473,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00716,
        "-2": 0.00212,
        "-1": 0.01956,
        "0": 0.48589,
        "1": 0.00367,
        "2": -0.00819,
        "3": 0.00193
      },
      "spy_leads_+1": 0.00367
    },
    "TSLA": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": 0.01645,
      "ac1_ci95": [
        -0.00215,
        0.03578
      ],
      "roll_rel_spread": null,
      "vr5": 1.0053,
      "vr30": 1.0155,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00901,
        "-2": -0.00031,
        "-1": 0.01181,
        "0": 0.40916,
        "1": 0.00585,
        "2": -0.00239,
        "3": 0.00135
      },
      "spy_leads_+1": 0.00585
    },
    "JPM": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.03379,
      "ac1_ci95": [
        -0.05157,
        -0.01069
      ],
      "roll_rel_spread": 0.000162,
      "vr5": 0.9574,
      "vr30": 0.9499,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00115,
        "-2": -0.00947,
        "-1": 0.00796,
        "0": 0.4252,
        "1": 0.00377,
        "2": 0.01337,
        "3": -0.00602
      },
      "spy_leads_+1": 0.00377
    },
    "XOM": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": -0.01076,
      "ac1_ci95": [
        -0.03129,
        0.00755
      ],
      "roll_rel_spread": 0.000105,
      "vr5": 0.9895,
      "vr30": 1.0847,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00277,
        "-2": -0.01127,
        "-1": 0.00023,
        "0": 0.20757,
        "1": -0.00728,
        "2": 0.00613,
        "3": 0.00189
      },
      "spy_leads_+1": -0.00728
    },
    "UNH": {
      "days_covered": 61,
      "staleness": 0.0024,
      "rth_fill_ratio": 0.9976,
      "n_trade_returns": 23673,
      "ac1": -0.05529,
      "ac1_ci95": [
        -0.08843,
        -0.02247
      ],
      "roll_rel_spread": 0.000279,
      "vr5": 0.8895,
      "vr30": 0.8411,
      "bucket": "liquid",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00305,
        "-2": -0.01299,
        "-1": 0.00162,
        "0": 0.12185,
        "1": 0.02334,
        "2": -4e-05,
        "3": 0.00096
      },
      "spy_leads_+1": 0.02334
    },
    "SPY": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": 0.00628,
      "ac1_ci95": [
        -0.01811,
        0.02379
      ],
      "roll_rel_spread": null,
      "vr5": 1.0101,
      "vr30": 0.9718,
      "bucket": "liquid",
      "asset": "etf"
    },
    "QQQ": {
      "days_covered": 61,
      "staleness": 0.0,
      "rth_fill_ratio": 1.0,
      "n_trade_returns": 23729,
      "ac1": 0.01507,
      "ac1_ci95": [
        -0.00676,
        0.0325
      ],
      "roll_rel_spread": null,
      "vr5": 1.0233,
      "vr30": 1.0059,
      "bucket": "liquid",
      "asset": "etf",
      "xcorr_vs_spy": {
        "-3": 0.00069,
        "-2": 0.00181,
        "-1": 0.01376,
        "0": 0.90007,
        "1": 0.01068,
        "2": -0.00847,
        "3": -0.00557
      },
      "spy_leads_+1": 0.01068
    },
    "ATRO": {
      "days_covered": 61,
      "staleness": 0.6919,
      "rth_fill_ratio": 0.3081,
      "n_trade_returns": 7269,
      "ac1": -0.05122,
      "ac1_ci95": [
        -0.08802,
        -0.01873
      ],
      "roll_rel_spread": 0.001022,
      "vr5": 0.8975,
      "vr30": 0.9242,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00995,
        "-2": -0.00133,
        "-1": -0.00238,
        "0": 0.09732,
        "1": 0.06282,
        "2": 0.03343,
        "3": 0.0201
      },
      "spy_leads_+1": 0.06282
    },
    "AUVI": {
      "days_covered": 61,
      "staleness": 0.6646,
      "rth_fill_ratio": 0.3354,
      "n_trade_returns": 7917,
      "ac1": -0.21019,
      "ac1_ci95": [
        -0.28933,
        -0.11986
      ],
      "roll_rel_spread": 0.008811,
      "vr5": 0.6587,
      "vr30": 0.6087,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.0033,
        "-2": 0.00165,
        "-1": -0.0025,
        "0": 0.01784,
        "1": 0.0057,
        "2": 0.01093,
        "3": -0.00067
      },
      "spy_leads_+1": 0.0057
    },
    "AXDX": {
      "days_covered": 61,
      "staleness": 0.8335,
      "rth_fill_ratio": 0.1665,
      "n_trade_returns": 3901,
      "ac1": -0.32299,
      "ac1_ci95": [
        -0.35528,
        -0.27751
      ],
      "roll_rel_spread": 0.019373,
      "vr5": 0.4941,
      "vr30": 0.3858,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00371,
        "-2": 0.01291,
        "-1": -0.0068,
        "0": 0.00065,
        "1": -0.00701,
        "2": 0.00379,
        "3": 0.01124
      },
      "spy_leads_+1": -0.00701
    },
    "BKE": {
      "days_covered": 61,
      "staleness": 0.288,
      "rth_fill_ratio": 0.712,
      "n_trade_returns": 16878,
      "ac1": -0.04574,
      "ac1_ci95": [
        -0.07188,
        -0.019
      ],
      "roll_rel_spread": 0.000494,
      "vr5": 0.9229,
      "vr30": 0.8628,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00949,
        "-2": -0.00335,
        "-1": -0.01292,
        "0": 0.21079,
        "1": 0.08981,
        "2": 0.03184,
        "3": -0.00685
      },
      "spy_leads_+1": 0.08981
    },
    "CECO": {
      "days_covered": 61,
      "staleness": 0.5311,
      "rth_fill_ratio": 0.4689,
      "n_trade_returns": 11093,
      "ac1": -0.16489,
      "ac1_ci95": [
        -0.23411,
        -0.07077
      ],
      "roll_rel_spread": 0.001807,
      "vr5": 0.7867,
      "vr30": 1.0073,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.01082,
        "-2": 0.00211,
        "-1": 0.00371,
        "0": 0.09421,
        "1": 0.06433,
        "2": 0.03838,
        "3": 0.01926
      },
      "spy_leads_+1": 0.06433
    },
    "HPE": {
      "days_covered": 61,
      "staleness": 0.0003,
      "rth_fill_ratio": 0.9997,
      "n_trade_returns": 23723,
      "ac1": -0.06183,
      "ac1_ci95": [
        -0.08556,
        -0.03994
      ],
      "roll_rel_spread": 0.000504,
      "vr5": 0.8673,
      "vr30": 1.0189,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00082,
        "-2": 0.00395,
        "-1": -0.00307,
        "0": 0.27357,
        "1": 0.00666,
        "2": -0.02272,
        "3": -0.00514
      },
      "spy_leads_+1": 0.00666
    },
    "HTD": {
      "days_covered": 61,
      "staleness": 0.6906,
      "rth_fill_ratio": 0.3094,
      "n_trade_returns": 7300,
      "ac1": -0.31279,
      "ac1_ci95": [
        -0.35006,
        -0.27744
      ],
      "roll_rel_spread": 0.00128,
      "vr5": 0.5425,
      "vr30": 0.4852,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00289,
        "-2": 0.00058,
        "-1": -0.00173,
        "0": 0.03006,
        "1": 0.05151,
        "2": 0.04017,
        "3": 0.01686
      },
      "spy_leads_+1": 0.05151
    },
    "HWM": {
      "days_covered": 61,
      "staleness": 0.0052,
      "rth_fill_ratio": 0.9948,
      "n_trade_returns": 23605,
      "ac1": -0.02708,
      "ac1_ci95": [
        -0.05571,
        0.00259
      ],
      "roll_rel_spread": 0.00019,
      "vr5": 0.9716,
      "vr30": 0.9134,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00501,
        "-2": -0.01232,
        "-1": 0.00072,
        "0": 0.33034,
        "1": 0.02045,
        "2": 0.00126,
        "3": -0.00136
      },
      "spy_leads_+1": 0.02045
    },
    "ICUI": {
      "days_covered": 61,
      "staleness": 0.4941,
      "rth_fill_ratio": 0.5059,
      "n_trade_returns": 11975,
      "ac1": -0.10807,
      "ac1_ci95": [
        -0.13625,
        -0.07268
      ],
      "roll_rel_spread": 0.001372,
      "vr5": 0.8884,
      "vr30": 0.8928,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00216,
        "-2": 0.01038,
        "-1": -0.00739,
        "0": 0.12354,
        "1": 0.0769,
        "2": 0.03793,
        "3": -0.00457
      },
      "spy_leads_+1": 0.0769
    },
    "KEY.K": {
      "days_covered": 61,
      "staleness": 0.8674,
      "rth_fill_ratio": 0.1326,
      "n_trade_returns": 3093,
      "ac1": -0.3469,
      "ac1_ci95": [
        -0.38592,
        -0.28806
      ],
      "roll_rel_spread": 0.005038,
      "vr5": 0.4251,
      "vr30": 0.2543,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.01268,
        "-2": 0.01152,
        "-1": 0.00011,
        "0": 0.00819,
        "1": 0.02132,
        "2": -0.00214,
        "3": 0.00553
      },
      "spy_leads_+1": 0.02132
    },
    "KSPI": {
      "days_covered": 48,
      "staleness": 0.471,
      "rth_fill_ratio": 0.529,
      "n_trade_returns": 9855,
      "ac1": -0.20949,
      "ac1_ci95": [
        -0.25785,
        -0.16733
      ],
      "roll_rel_spread": 0.001597,
      "vr5": 0.6778,
      "vr30": 0.6525,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00345,
        "-2": -0.00331,
        "-1": 0.01628,
        "0": 0.01032,
        "1": 0.02003,
        "2": 0.00966,
        "3": -0.00787
      },
      "spy_leads_+1": 0.02003
    },
    "LENZ": {
      "days_covered": 61,
      "staleness": 0.7067,
      "rth_fill_ratio": 0.2933,
      "n_trade_returns": 6916,
      "ac1": -0.27902,
      "ac1_ci95": [
        -0.35931,
        -0.19937
      ],
      "roll_rel_spread": 0.007069,
      "vr5": 0.623,
      "vr30": 0.464,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.01234,
        "-2": 0.00659,
        "-1": 0.00154,
        "0": 0.00207,
        "1": 0.0143,
        "2": 0.00425,
        "3": -0.00163
      },
      "spy_leads_+1": 0.0143
    },
    "PBYI": {
      "days_covered": 61,
      "staleness": 0.3251,
      "rth_fill_ratio": 0.6749,
      "n_trade_returns": 15996,
      "ac1": -0.11171,
      "ac1_ci95": [
        -0.14442,
        -0.07365
      ],
      "roll_rel_spread": 0.002591,
      "vr5": 0.8282,
      "vr30": 0.82,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00863,
        "-2": -0.00987,
        "-1": 0.0077,
        "0": 0.04659,
        "1": 0.03636,
        "2": 0.00891,
        "3": 0.00204
      },
      "spy_leads_+1": 0.03636
    },
    "PLNT": {
      "days_covered": 61,
      "staleness": 0.0305,
      "rth_fill_ratio": 0.9695,
      "n_trade_returns": 23004,
      "ac1": -0.01553,
      "ac1_ci95": [
        -0.03743,
        0.00607
      ],
      "roll_rel_spread": 0.000235,
      "vr5": 0.9942,
      "vr30": 1.0098,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": -0.00276,
        "-2": 0.01403,
        "-1": 0.00527,
        "0": 0.20839,
        "1": 0.03961,
        "2": -0.00434,
        "3": -0.00844
      },
      "spy_leads_+1": 0.03961
    },
    "RITM.B": {
      "days_covered": 61,
      "staleness": 0.8984,
      "rth_fill_ratio": 0.1016,
      "n_trade_returns": 2356,
      "ac1": -0.25345,
      "ac1_ci95": [
        -0.30424,
        -0.17296
      ],
      "roll_rel_spread": 0.001261,
      "vr5": 0.5839,
      "vr30": 0.3502,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00127,
        "-2": 0.01134,
        "-1": -0.01608,
        "0": -0.00305,
        "1": 0.01628,
        "2": 0.00606,
        "3": 0.00448
      },
      "spy_leads_+1": 0.01628
    },
    "RPM": {
      "days_covered": 61,
      "staleness": 0.2196,
      "rth_fill_ratio": 0.7804,
      "n_trade_returns": 18504,
      "ac1": -0.0903,
      "ac1_ci95": [
        -0.13912,
        -0.06355
      ],
      "roll_rel_spread": 0.000398,
      "vr5": 0.8569,
      "vr30": 0.8519,
      "bucket": "random",
      "asset": "stock",
      "xcorr_vs_spy": {
        "-3": 0.00269,
        "-2": 0.01379,
        "-1": -0.01292,
        "0": 0.25954,
        "1": 0.09142,
        "2": 0.01975,
        "3": 0.02268
      },
      "spy_leads_+1": 0.09142
    },
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