{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "code": "low_tier",
      "scope": "expiry",
      "severity": "WARN",
      "expiry_dt": "2026-09-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-09-29",
      "message_short": "LOW tier (direct straddle)",
      "message_long": "Accept tier: LOW (DIRECT_STRADDLE_ONLY path)",
      "metrics": {}
    },
    {
      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2027-03-30",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2027-03-30",
      "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": "2026-06-30",
      "interval_to": "2026-09-29",
      "strike": null,
      "target_key": "06-30\u219209-29",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "baseline_thin",
      "scope": "interval",
      "severity": "INFO",
      "expiry_dt": null,
      "interval_from": "2026-09-29",
      "interval_to": "2026-12-29",
      "strike": null,
      "target_key": "09-29\u219212-29",
      "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": "2026-09-29",
      "interval_to": "2026-12-29",
      "strike": null,
      "target_key": "09-29\u219212-29",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-28",
      "interval_to": "2026-05-05",
      "strike": null,
      "target_key": "04-28\u219205-05",
      "message_short": "Elevated fwd vol (31.1%)",
      "message_long": "Forward volatility: 31.1% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3114713297718838,
        "threshold": 0.3
      }
    }
  ],
  "summary": {
    "total": 6,
    "fail_count": 0,
    "warn_count": 4,
    "info_count": 2
  },
  "derived": {
    "structure_summary": {
      "iv_7d": {
        "pct": 31.80799709204974,
        "pct_cal": 18.144293457024983,
        "actual_dte": 7,
        "expiry_date": "2026-04-28",
        "tau_eff": 0.0063288890638833455,
        "tau_cal": 0.019450017953773418,
        "tau_ratio": 3.073212021485343
      },
      "iv_30d": {
        "pct": 29.469303888010103,
        "pct_cal": 16.459963885510575,
        "actual_dte": 28,
        "expiry_date": "2026-05-19",
        "tau_eff": 0.024004781294363845,
        "tau_cal": 0.07694488448354755,
        "tau_ratio": 3.205398272118966
      },
      "iv_90d": {
        "pct": 26.642282792357236,
        "pct_cal": 14.83133991939605,
        "actual_dte": 70,
        "expiry_date": "2026-06-30",
        "tau_eff": 0.05948003580908201,
        "tau_cal": 0.19193461754309582,
        "tau_ratio": 3.2268746131754904
      },
      "front_slope_pct": -2.3386932040396378,
      "back_slope_pct": -2.8270210956528654,
      "max_fwd_vol_pct": 31.14713297718838,
      "max_fwd_vol_interval": {
        "from": "2026-04-28",
        "to": "2026-05-05"
      },
      "max_fwd_vol_dte_range": {
        "start_dte": 7,
        "end_dte": 14
      },
      "neg_interval_count": 0,
      "clock_primary": "variance_time",
      "clock_secondary": "calendar",
      "vt_vintage": "202603",
      "beta_on": 0.12931315994459922,
      "beta_we": 0.19024823173932068,
      "quote_context_dt": "2026-04-21T13:00:04.113422+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": "2026-04-28",
          "to": "2026-05-05",
          "start_dte": 7,
          "end_dte": 14,
          "forward_vol": 0.3114713297718838,
          "forward_variance": 0.0970143892698656
        },
        {
          "from": "2026-05-05",
          "to": "2026-05-12",
          "start_dte": 14,
          "end_dte": 21,
          "forward_vol": 0.2999253044263202,
          "forward_variance": 0.08995518823522086
        },
        {
          "from": "2026-05-26",
          "to": "2026-06-30",
          "start_dte": 35,
          "end_dte": 70,
          "forward_vol": 0.24547689491002206,
          "forward_variance": 0.06025890593466601
        },
        {
          "from": "2026-05-19",
          "to": "2026-05-26",
          "start_dte": 28,
          "end_dte": 35,
          "forward_vol": 0.24533826856429294,
          "forward_variance": 0.06019086602212514
        },
        {
          "from": "2026-05-12",
          "to": "2026-05-19",
          "start_dte": 21,
          "end_dte": 28,
          "forward_vol": 0.24355483671293143,
          "forward_variance": 0.059318958486262695
        }
      ],
      "lowest": [
        {
          "from": "2026-06-30",
          "to": "2026-09-29",
          "start_dte": 70,
          "end_dte": 161,
          "forward_vol": 0.20359924066379403,
          "forward_variance": 0.041452650798873523
        },
        {
          "from": "2026-09-29",
          "to": "2026-12-29",
          "start_dte": 161,
          "end_dte": 252,
          "forward_vol": 0.23354369598956964,
          "forward_variance": 0.05454265793646853
        },
        {
          "from": "2026-05-12",
          "to": "2026-05-19",
          "start_dte": 21,
          "end_dte": 28,
          "forward_vol": 0.24355483671293143,
          "forward_variance": 0.059318958486262695
        },
        {
          "from": "2026-05-19",
          "to": "2026-05-26",
          "start_dte": 28,
          "end_dte": 35,
          "forward_vol": 0.24533826856429294,
          "forward_variance": 0.06019086602212514
        },
        {
          "from": "2026-05-26",
          "to": "2026-06-30",
          "start_dte": 35,
          "end_dte": 70,
          "forward_vol": 0.24547689491002206,
          "forward_variance": 0.06025890593466601
        }
      ],
      "neg_intervals": []
    },
    "forward_volatility_matrix": {
      "schema_version": "fwdvol_matrix_v2",
      "status": "available",
      "expiry_filter_policy_version": "usable_expiries_v1",
      "expiry_dates": [
        "2026-04-28",
        "2026-05-05",
        "2026-05-12",
        "2026-05-19",
        "2026-05-26",
        "2026-06-30",
        "2026-09-29",
        "2026-12-29"
      ],
      "dte_days": [
        7,
        14,
        21,
        28,
        35,
        70,
        161,
        252
      ],
      "matrix_fwdvol_pct": [
        [
          null,
          31.14713297718838,
          30.552733671862555,
          28.58544843979402,
          27.609647047807528,
          25.95878476752475,
          22.793358008301677,
          23.0025740734792
        ],
        [
          null,
          null,
          29.99253044263202,
          27.31978648539219,
          26.423790590022517,
          25.279266965725338,
          22.349427354085798,
          22.736824792333287
        ],
        [
          null,
          null,
          null,
          24.355483671293143,
          24.444817907727174,
          24.517786389126154,
          21.89262273956426,
          22.47690659019241
        ],
        [
          null,
          null,
          null,
          null,
          24.533826856429293,
          24.545328475804073,
          21.75377309829218,
          22.414800608501206
        ],
        [
          null,
          null,
          null,
          null,
          null,
          24.547689491002206,
          21.586923292655065,
          22.342054539577685
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          20.359924066379403,
          21.898815391795264
        ],
        [
          null,
          null,
          null,
          null,
          null,
          null,
          null,
          23.354369598956964
        ],
        [
          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
        ]
      ],
      "clip": {
        "method": "percentile",
        "p_lo": 5,
        "p_hi": 95,
        "vmin": 21.645320724628053,
        "vmax": 30.356662541631867
      },
      "usable_count": 8,
      "excluded": []
    },
    "expiry_quality_summary": {
      "schema_version": "expiry_quality_summary_v1",
      "filter_policy_version": "usable_expiries_v1",
      "total_count": 9,
      "usable_count": 8,
      "excluded": [
        {
          "expiry_date": "2027-03-30",
          "dte_days": 343,
          "reject_reason": "insufficient_strikes",
          "accept_tier": null,
          "why": "insufficient_strikes"
        }
      ]
    },
    "build_metadata": {
      "git_commit": "1d3681d4",
      "build_timestamp": "2026-04-21T07:30:09.225958+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": "2026-04-21T07:30:09.226475+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": 8,
        "excluded_expiries": 1,
        "neg_cells": 0,
        "issues_fail": 0,
        "issues_warn": 4
      }
    },
    "ui_presets": {
      "schema_version": "ui_presets_v1",
      "generated_at_utc": "2026-04-21T07:30:09.230145+00:00",
      "asof_iso": "2026-04-21T13:00:04.113422+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": []
    }
  }
}