{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "code": "low_tier",
      "scope": "expiry",
      "severity": "WARN",
      "expiry_dt": "2026-12-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-12-29",
      "message_short": "LOW tier (direct straddle)",
      "message_long": "Accept tier: LOW (DIRECT_STRADDLE_ONLY path)",
      "metrics": {}
    },
    {
      "code": "low_tier",
      "scope": "expiry",
      "severity": "WARN",
      "expiry_dt": "2027-03-30",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2027-03-30",
      "message_short": "LOW tier (direct straddle)",
      "message_long": "Accept tier: LOW (DIRECT_STRADDLE_ONLY path)",
      "metrics": {}
    },
    {
      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2027-06-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2027-06-29",
      "message_short": "Rejected: insufficient_strikes",
      "message_long": "Expiry rejected: insufficient_strikes",
      "metrics": {
        "reject_reason": "insufficient_strikes"
      }
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-08-18",
      "interval_to": "2026-08-25",
      "strike": null,
      "target_key": "08-18\u219208-25",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-08-25",
      "interval_to": "2026-09-01",
      "strike": null,
      "target_key": "08-25\u219209-01",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "baseline_fallback",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-09-01",
      "interval_to": "2026-09-29",
      "strike": null,
      "target_key": "09-01\u219209-29",
      "message_short": "Baseline fallback",
      "message_long": "Baseline quality: FALLBACK (edge case)",
      "metrics": {
        "baseline_n": 1
      }
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-12-29",
      "interval_to": "2027-03-30",
      "strike": null,
      "target_key": "12-29\u219203-30",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "low_coverage",
      "scope": "run",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "run",
      "message_short": "Low coverage (44%)",
      "message_long": "Weighted-mid coverage: 44.0% (threshold: 50%)",
      "metrics": {
        "avg_coverage": 44.0,
        "threshold": 50.0
      }
    }
  ],
  "summary": {
    "total": 8,
    "fail_count": 0,
    "warn_count": 7,
    "info_count": 1
  },
  "derived": {
    "structure_summary": {
      "iv_7d": {
        "pct": 21.205008524052463,
        "pct_cal": 11.484666125845777,
        "actual_dte": 4,
        "expiry_date": "2026-07-28",
        "tau_eff": 0.003217902748054885,
        "tau_cal": 0.010970162706891525,
        "tau_ratio": 3.409103246989867
      },
      "iv_30d": {
        "pct": 23.299223881798437,
        "pct_cal": 13.249591892215411,
        "actual_dte": 32,
        "expiry_date": "2026-08-25",
        "tau_eff": 0.028338367635643964,
        "tau_cal": 0.08762998474659035,
        "tau_ratio": 3.0922735520012616
      },
      "iv_90d": {
        "pct": null,
        "pct_cal": null,
        "actual_dte": null,
        "expiry_date": null,
        "tau_eff": null,
        "tau_cal": null,
        "tau_ratio": null
      },
      "front_slope_pct": 2.094215357745974,
      "back_slope_pct": null,
      "max_fwd_vol_pct": 25.291239167604413,
      "max_fwd_vol_interval": {
        "from": "2026-08-25",
        "to": "2026-09-01"
      },
      "max_fwd_vol_dte_range": {
        "start_dte": 32,
        "end_dte": 39
      },
      "neg_interval_count": 0,
      "clock_primary": "variance_time",
      "clock_secondary": "calendar",
      "vt_vintage": "202606",
      "beta_on": 0.15477964854366905,
      "beta_we": 0.1942884133079315,
      "quote_context_dt": "2026-07-24T15:20:07.993361+05:30",
      "effective_quote_policy": "weighted_mid",
      "tau_mode_math": "variance_time",
      "rr_25d": null,
      "fly_25d": null,
      "put_iv_25d": null,
      "call_iv_25d": null,
      "rr_fly_diagnostics": null
    },
    "interval_leaderboard": {
      "highest": [
        {
          "from": "2026-08-25",
          "to": "2026-09-01",
          "start_dte": 32,
          "end_dte": 39,
          "forward_vol": 0.2529123916760441,
          "forward_variance": 0.06396467786329675
        },
        {
          "from": "2026-08-04",
          "to": "2026-08-11",
          "start_dte": 11,
          "end_dte": 18,
          "forward_vol": 0.24021553897280962,
          "forward_variance": 0.05770350516399742
        },
        {
          "from": "2026-07-28",
          "to": "2026-08-04",
          "start_dte": 4,
          "end_dte": 11,
          "forward_vol": 0.23751730464712842,
          "forward_variance": 0.05641447000683682
        },
        {
          "from": "2026-08-11",
          "to": "2026-08-18",
          "start_dte": 18,
          "end_dte": 25,
          "forward_vol": 0.23308396052857322,
          "forward_variance": 0.05432813265568547
        },
        {
          "from": "2026-08-18",
          "to": "2026-08-25",
          "start_dte": 25,
          "end_dte": 32,
          "forward_vol": 0.23123802664697568,
          "forward_variance": 0.05347102496758743
        }
      ],
      "lowest": [
        {
          "from": "2026-12-29",
          "to": "2027-03-30",
          "start_dte": 158,
          "end_dte": 249,
          "forward_vol": 0.1572059022215116,
          "forward_variance": 0.024713695693279466
        },
        {
          "from": "2026-09-01",
          "to": "2026-09-29",
          "start_dte": 39,
          "end_dte": 67,
          "forward_vol": 0.20090593740111862,
          "forward_variance": 0.04036319568302219
        },
        {
          "from": "2026-09-29",
          "to": "2026-12-29",
          "start_dte": 67,
          "end_dte": 158,
          "forward_vol": 0.21708294209415335,
          "forward_variance": 0.047125003748253534
        },
        {
          "from": "2026-08-18",
          "to": "2026-08-25",
          "start_dte": 25,
          "end_dte": 32,
          "forward_vol": 0.23123802664697568,
          "forward_variance": 0.05347102496758743
        },
        {
          "from": "2026-08-11",
          "to": "2026-08-18",
          "start_dte": 18,
          "end_dte": 25,
          "forward_vol": 0.23308396052857322,
          "forward_variance": 0.05432813265568547
        }
      ],
      "neg_intervals": []
    },
    "forward_volatility_matrix": {
      "schema_version": "fwdvol_matrix_v2",
      "status": "available",
      "expiry_filter_policy_version": "usable_expiries_v1",
      "expiry_dates": [
        "2026-07-28",
        "2026-08-04",
        "2026-08-11",
        "2026-08-18",
        "2026-08-25",
        "2026-09-01",
        "2026-09-29",
        "2026-12-29",
        "2027-03-30"
      ],
      "dte_days": [
        4,
        11,
        18,
        25,
        32,
        39,
        67,
        158,
        249
      ],
      "matrix_fwdvol_pct": [
        [
          null,
          23.751730464712843,
          23.887023168535908,
          23.695717463043803,
          23.554040672149394,
          23.911579230883262,
          22.312851844268398,
          21.959493338020554,
          19.849598106105194
        ],
        [
          null,
          null,
          24.021553897280963,
          23.667661251133676,
          23.487774322490292,
          23.95137473353915,
          22.124551560521308,
          21.86894884205287,
          19.721804614519137
        ],
        [
          null,
          null,
          null,
          23.308396052857322,
          23.21628282297501,
          23.927935938742515,
          21.83684532773978,
          21.753672873362607,
          19.575186186410747
        ],
        [
          null,
          null,
          null,
          null,
          23.123802664697568,
          24.231766632963865,
          21.578420565957966,
          21.667132219308655,
          19.44553316152863
        ],
        [
          null,
          null,
          null,
          null,
          null,
          25.291239167604413,
          21.25066193600381,
          21.581630817694734,
          19.313702793923053
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          20.090593740111863,
          21.33822794222875,
          19.079436213210865
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          21.708294209415335,
          18.920549903287473
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          15.72059022215116
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null
        ]
      ],
      "neg_mask": [
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ]
      ],
      "clip": {
        "method": "percentile",
        "p_lo": 5,
        "p_hi": 95,
        "vmin": 19.039714635730018,
        "vmax": 24.07410708120169
      },
      "usable_count": 9,
      "excluded": []
    },
    "expiry_quality_summary": {
      "schema_version": "expiry_quality_summary_v1",
      "filter_policy_version": "usable_expiries_v1",
      "total_count": 10,
      "usable_count": 9,
      "excluded": [
        {
          "expiry_date": "2027-06-29",
          "dte_days": 340,
          "reject_reason": "insufficient_strikes",
          "accept_tier": null,
          "why": "insufficient_strikes"
        }
      ]
    },
    "build_metadata": {
      "git_commit": "6814d69f7",
      "build_timestamp": "2026-07-24T09:50:15.314524+00:00",
      "python_version": "3.13"
    },
    "request_echo": {
      "event_windows_requested": false,
      "sliding_windows_requested": false,
      "diagnostics_level": "lite",
      "tau_mode": "variance_time",
      "event_windows_exported": false,
      "event_windows_count": 0,
      "sliding_windows_exported": false,
      "ui_presets_exported": true,
      "ui_presets_events_count": 0,
      "ui_presets_missing_reason": null,
      "required_iv_tenors": []
    },
    "ui_limits": {
      "max_horizon_days": 56,
      "max_horizon_label": "8w_liquid",
      "min_horizon_days": 0,
      "tz": "Asia/Kolkata",
      "notes": "UI clamps horizon; avoid LEAPS/illiquid expiries beyond 8 weeks"
    },
    "ui_capabilities": {
      "schema_version": "ui_capabilities_v1",
      "generated_at_utc": "2026-07-24T09:50:15.315202+00:00",
      "source": "volstrats.analytics.ui_capabilities.build_ui_capabilities",
      "filter_policy": {
        "name": "UI_GRADE",
        "version": "usable_expiries_v1"
      },
      "missing_reason": null,
      "features": {
        "forward_matrix_json": false,
        "quote_cards_html": false,
        "event_window_tool": false,
        "sliding_windows": false,
        "smile_density_plots": false,
        "chain_snapshots": false,
        "carry_data": true
      },
      "counts": {
        "usable_expiries": 9,
        "excluded_expiries": 1,
        "neg_cells": 0,
        "issues_fail": 0,
        "issues_warn": 7
      }
    },
    "ui_presets": {
      "schema_version": "ui_presets_v1",
      "generated_at_utc": "2026-07-24T09:50:15.319061+00:00",
      "asof_iso": "2026-07-24T15:20:07.993361+05:30",
      "asof_source": "structure_summary.quote_context_dt",
      "horizon_days": 56,
      "tz": "Asia/Kolkata",
      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
      "id_format": "CATEGORY_YYYYMM",
      "events": []
    }
  }
}