{
  "schema_version": "fwdvar_diagnostics_v4",
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      "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": "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_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-06-30",
      "interval_to": "2026-07-07",
      "strike": null,
      "target_key": "06-30\u219207-07",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
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    },
    {
      "code": "neg_fwdvar",
      "scope": "interval",
      "severity": "INFO",
      "expiry_dt": null,
      "interval_from": "2026-07-07",
      "interval_to": "2026-07-14",
      "strike": null,
      "target_key": "07-07\u219207-14",
      "message_short": "NEG forward variance",
      "message_long": "Negative forward variance: -0.0633",
      "metrics": {
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        "near_var": 0.0014887787705642685,
        "far_var": 0.0011022248414452782,
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    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
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      "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"
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    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-07-14",
      "interval_to": "2026-07-28",
      "strike": null,
      "target_key": "07-14\u219207-28",
      "message_short": "Elevated fwd vol (36.1%)",
      "message_long": "Forward volatility: 36.1% (threshold: 30%)",
      "metrics": {
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  "summary": {
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    "build_metadata": {
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      "diagnostics_level": "lite",
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      "ui_presets_events_count": 0,
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    "ui_limits": {
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      "max_horizon_label": "8w_liquid",
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      "tz": "Asia/Kolkata",
      "notes": "UI clamps horizon; avoid LEAPS/illiquid expiries beyond 8 weeks"
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    "ui_capabilities": {
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      "asof_iso": "2026-06-11T13:00:12.730953+05:30",
      "asof_source": "structure_summary.quote_context_dt",
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      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
      "id_format": "CATEGORY_YYYYMM",
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}