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    "type": "ValueError",
    "message": "Invalid frequency: A. Failed to parse with error message: ValueError(\"Invalid frequency: A. Failed to parse with error message: KeyError('A'). Did you mean Y?\") Did you mean Y?"
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    "period": [
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    "2025-12-30",
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  "prefix_endpoint_sensitivity": [
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    {
      "start": "2018-01-02",
      "end": "2025-12-31",
      "days": 1942,
      "final_nav": 1.75994183682109,
      "total_return": 0.75994183682109,
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      "peak": "2021-02-10",
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  "claims": "Conditional on supplied price series; total-return provenance not certified, synthetic adjusted-price units not real exchange shares",
  "transaction_cost_basis": "Unified 5/25 bps scenarios, not personal broker fee quotation; no fund fee double deduction, investor tax/FX/whole lots not modeled"
}