{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "code": "sparse_chain",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2026-05-12",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-05-12",
      "message_short": "Sparse chain",
      "message_long": "Option chain is sparse (fewer strikes than normal)",
      "metrics": {
        "n_pairs_atm": 4,
        "min_pairs_required": 5
      }
    },
    {
      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2026-09-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-09-29",
      "message_short": "Rejected: missing_quotes",
      "message_long": "Expiry rejected: missing_quotes",
      "metrics": {
        "reject_reason": "missing_quotes"
      }
    },
    {
      "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": "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": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-13",
      "interval_to": "2026-04-21",
      "strike": null,
      "target_key": "04-13\u219204-21",
      "message_short": "Elevated fwd vol (32.3%)",
      "message_long": "Forward volatility: 32.3% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.32292202110429596,
        "threshold": 0.3
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    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-21",
      "interval_to": "2026-04-28",
      "strike": null,
      "target_key": "04-21\u219204-28",
      "message_short": "Elevated fwd vol (31.6%)",
      "message_long": "Forward volatility: 31.6% (threshold: 30%)",
      "metrics": {
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        "threshold": 0.3
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    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-05",
      "interval_to": "2026-05-12",
      "strike": null,
      "target_key": "05-05\u219205-12",
      "message_short": "Elevated fwd vol (37.8%)",
      "message_long": "Forward volatility: 37.8% (threshold: 30%)",
      "metrics": {
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  "summary": {
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    "fail_count": 0,
    "warn_count": 4,
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    "build_metadata": {
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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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      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
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}