{
  "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": "low_tier",
      "scope": "expiry",
      "severity": "WARN",
      "expiry_dt": "2027-06-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2027-06-29",
      "message_short": "LOW tier (direct straddle)",
      "message_long": "Accept tier: LOW (DIRECT_STRADDLE_ONLY path)",
      "metrics": {}
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-10-13",
      "interval_to": "2026-10-27",
      "strike": null,
      "target_key": "10-13\u219210-27",
      "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": "2026-10-27",
      "interval_to": "2026-11-23",
      "strike": null,
      "target_key": "10-27\u219211-23",
      "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": "2026-11-23",
      "interval_to": "2026-12-29",
      "strike": null,
      "target_key": "11-23\u219212-29",
      "message_short": "Baseline fallback",
      "message_long": "Baseline quality: FALLBACK (edge case)",
      "metrics": {
        "baseline_n": 0
      }
    },
    {
      "code": "baseline_thin",
      "scope": "interval",
      "severity": "INFO",
      "expiry_dt": null,
      "interval_from": "2026-12-29",
      "interval_to": "2027-03-30",
      "strike": null,
      "target_key": "12-29\u219203-30",
      "message_short": "Thin baseline",
      "message_long": "Baseline quality: THIN (few neighbors: 1)",
      "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": "neg_fwdvar",
      "scope": "interval",
      "severity": "INFO",
      "expiry_dt": null,
      "interval_from": "2027-03-30",
      "interval_to": "2027-06-29",
      "strike": null,
      "target_key": "03-30\u219206-29",
      "message_short": "NEG forward variance",
      "message_long": "Negative forward variance: -0.0314",
      "metrics": {
        "fwd_var": -0.031422271336398,
        "near_var": 0.0068436114523716795,
        "far_var": 0.00420054196643504,
        "ba_age_near": 116.004423,
        "ba_age_far": 217.636937
      }
    },
    {
      "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 (42%)",
      "message_long": "Weighted-mid coverage: 41.7% (threshold: 50%)",
      "metrics": {
        "avg_coverage": 41.66666666666667,
        "threshold": 50.0
      }
    }
  ],
  "summary": {
    "total": 10,
    "fail_count": 0,
    "warn_count": 8,
    "info_count": 2
  },
  "derived": {
    "structure_summary": {
      "iv_7d": {
        "pct": 19.73188615006908,
        "pct_cal": 11.84719672297495,
        "actual_dte": 7,
        "expiry_date": "2026-09-22",
        "tau_eff": 0.007155485511293959,
        "tau_cal": 0.019849296024634318,
        "tau_ratio": 2.773997095417901
      },
      "iv_30d": {
        "pct": 19.50706144967678,
        "pct_cal": 11.321625707480651,
        "actual_dte": 28,
        "expiry_date": "2026-10-13",
        "tau_eff": 0.026053220998674485,
        "tau_cal": 0.07734416255440844,
        "tau_ratio": 2.968698671014363
      },
      "iv_90d": {
        "pct": 19.13135800523921,
        "pct_cal": 11.0342996321069,
        "actual_dte": 105,
        "expiry_date": "2026-12-29",
        "tau_eff": 0.09585828263213074,
        "tau_cal": 0.28815867316358024,
        "tau_ratio": 3.0060905041396215
      },
      "front_slope_pct": -0.22482470039230096,
      "back_slope_pct": -0.37570344443756953,
      "max_fwd_vol_pct": 19.912225348796795,
      "max_fwd_vol_interval": {
        "from": "2026-12-29",
        "to": "2027-03-30"
      },
      "max_fwd_vol_dte_range": {
        "start_dte": 105,
        "end_dte": 196
      },
      "neg_interval_count": 1,
      "clock_primary": "variance_time",
      "clock_secondary": "calendar",
      "vt_vintage": "202608",
      "beta_on": 0.17242368948004796,
      "beta_we": 0.20058050546898457,
      "quote_context_dt": "2026-09-15T09:30:03.855773+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": "2026-12-29",
          "to": "2027-03-30",
          "start_dte": 105,
          "end_dte": 196,
          "forward_vol": 0.19912225348796794,
          "forward_variance": 0.03964967183412656,
          "leg_accept_tier_worst": "LOW",
          "leg_atm_gate_passed_both": false
        },
        {
          "from": "2026-09-29",
          "to": "2026-10-06",
          "start_dte": 14,
          "end_dte": 21,
          "forward_vol": 0.1989786088869809,
          "forward_variance": 0.03959248679459811,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-10-06",
          "to": "2026-10-13",
          "start_dte": 21,
          "end_dte": 28,
          "forward_vol": 0.1969677521495546,
          "forward_variance": 0.03879629538684836,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-09-15",
          "to": "2026-09-22",
          "start_dte": 0,
          "end_dte": 7,
          "forward_vol": 0.19324609206180046,
          "forward_variance": 0.03734405209715786,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-11-23",
          "to": "2026-12-29",
          "start_dte": 69,
          "end_dte": 105,
          "forward_vol": 0.19069588918296485,
          "forward_variance": 0.036364922151281606,
          "leg_accept_tier_worst": "LOW",
          "leg_atm_gate_passed_both": false
        }
      ],
      "lowest": [
        {
          "from": "2026-09-22",
          "to": "2026-09-29",
          "start_dte": 7,
          "end_dte": 14,
          "forward_vol": 0.18685667485643606,
          "forward_variance": 0.034915416938403866,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-10-27",
          "to": "2026-11-23",
          "start_dte": 42,
          "end_dte": 69,
          "forward_vol": 0.18846342850068465,
          "forward_variance": 0.035518463882232676,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-10-13",
          "to": "2026-10-27",
          "start_dte": 28,
          "end_dte": 42,
          "forward_vol": 0.1906344029403122,
          "forward_variance": 0.03634147558440931,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        },
        {
          "from": "2026-11-23",
          "to": "2026-12-29",
          "start_dte": 69,
          "end_dte": 105,
          "forward_vol": 0.19069588918296485,
          "forward_variance": 0.036364922151281606,
          "leg_accept_tier_worst": "LOW",
          "leg_atm_gate_passed_both": false
        },
        {
          "from": "2026-09-15",
          "to": "2026-09-22",
          "start_dte": 0,
          "end_dte": 7,
          "forward_vol": 0.19324609206180046,
          "forward_variance": 0.03734405209715786,
          "leg_accept_tier_worst": "HIGH",
          "leg_atm_gate_passed_both": true
        }
      ],
      "neg_intervals": [
        {
          "from": "2027-03-30",
          "to": "2027-06-29",
          "forward_variance": -0.031422271336398,
          "notes": "NEG_FWDVAR",
          "debug": {
            "quote_age_near": "116s",
            "pricing_mode": "ltp_fallback"
          }
        }
      ]
    },
    "forward_volatility_matrix": {
      "schema_version": "fwdvol_matrix_v2",
      "status": "available",
      "expiry_filter_policy_version": "usable_expiries_v1",
      "expiry_dates": [
        "2026-09-15",
        "2026-09-22",
        "2026-09-29",
        "2026-10-06",
        "2026-10-13",
        "2026-10-27",
        "2026-11-23",
        "2026-12-29",
        "2027-03-30",
        "2027-06-29"
      ],
      "dte_days": [
        0,
        7,
        14,
        21,
        28,
        42,
        69,
        105,
        196,
        287
      ],
      "matrix_fwdvol_pct": [
        [
          null,
          19.324609206180046,
          19.007823262483495,
          19.292817490953134,
          19.39664964380901,
          19.287387450533284,
          19.113703343421367,
          19.09867597864486,
          19.48459081885996,
          12.572552254500058
        ],
        [
          null,
          null,
          18.685667485643606,
          19.276244303688443,
          19.421253978221802,
          19.27970416754947,
          19.089297143290164,
          19.08209079465564,
          19.490555090149343,
          12.35497239710007
        ],
        [
          null,
          null,
          null,
          19.89786088869809,
          19.793420087942252,
          19.43102254014406,
          19.141127655865755,
          19.112933894892844,
          19.52119204080398,
          12.147789599657944
        ],
        [
          null,
          null,
          null,
          null,
          19.69677521495546,
          19.28197223197911,
          19.03595733800524,
          19.050270325530462,
          19.507062108013855,
          11.896130189859909
        ],
        [
          null,
          null,
          null,
          null,
          null,
          19.06344029403122,
          18.919166387167518,
          18.989230070186544,
          19.49904667391456,
          11.611155661860543
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          18.846342850068464,
          18.973028577868153,
          19.53703103406634,
          11.05286785938271
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          19.069588918296486,
          19.68129669374816,
          9.658196726199662
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          19.912225348796795,
          6.413813412365752
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          null
        ],
        [
          null,
          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,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          true
        ],
        [
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false,
          false
        ]
      ],
      "clip": {
        "method": "percentile",
        "p_lo": 5,
        "p_hi": 95,
        "vmin": 11.136611029754384,
        "vmax": 19.778923356994234
      },
      "usable_count": 10,
      "excluded": []
    },
    "expiry_quality_summary": {
      "schema_version": "expiry_quality_summary_v1",
      "filter_policy_version": "usable_expiries_v1",
      "total_count": 10,
      "usable_count": 10,
      "excluded": []
    },
    "build_metadata": {
      "git_commit": "03e06b61d",
      "build_timestamp": "2026-09-15T04:00:07.753072+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": "2026-09-15T04:00:07.761651+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": 10,
        "excluded_expiries": 0,
        "neg_cells": 1,
        "issues_fail": 0,
        "issues_warn": 8
      }
    },
    "ui_presets": {
      "schema_version": "ui_presets_v1",
      "generated_at_utc": "2026-09-15T04:00:07.764740+00:00",
      "asof_iso": "2026-09-15T09:30:03.855773+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": []
    }
  }
}