{"schema_version": "maic.public_performance_methodology.v1", "version": "MAIC_PUBLIC_PERFORMANCE_METHOD_V1", "freeze_timestamp": "2026-09-30T14:35:19Z", "causal_policy_boundary": "2026-09-09T11:07:56Z", "point_in_time_oos": "Causal multi-asset research replay from 2023-01-01 using only information admitted by the reviewed historical evidence policy.", "frozen_live_forward": "Append-only model-portfolio record using weekly decisions and sealed provider identities captured after the production freeze boundary.", "difference": "OOS is historical research evidence. Live Forward is chronological forward evidence. They are never compounded or presented as one track.", "authority_frequency": "Weekly confirmed Authority/effective intervals.", "benchmark": "BTC Buy & Hold aligned to the exact same interval endpoints and normalized to 1.0.", "cost_assumption": "Gross model path plus 10 bps turnover-stress path; this is a sensitivity, not observed brokerage cost.", "sharpe": "Weekly returns annualized by sqrt(52), zero risk-free rate.", "sortino": "Weekly returns annualized by sqrt(52), zero target return.", "max_drawdown": "Minimum NAV / running-peak NAV - 1 from the same equity curve published to clients.", "missing_data": "Fail closed. Missing required endpoint evidence creates DATA_GAP/PUBLICATION_PENDING and no fabricated interval.", "delisted_assets": "No symbol substitution. Historical identity and provider lineage remain frozen; unavailable required prices prevent publication.", "stablecoins": "Canonical Cash/Stablecoin bucket is modeled at zero return unless a future methodology version explicitly changes this rule.", "tokenized_metals": "Uses the sealed provider-identity policy already embedded in the canonical PAS live-forward evaluator; no historical symbol-only resolution.", "data_revision_policy": "Objective data corrections append a revision record referencing the original record hash. Original rows are never overwritten.", "model_change_policy": "Material model or strategy changes require a new model generation and commencement date; Generation 1 remains available.", "hash_chain": "Each ledger row hashes its canonical representation with SHA-256 and includes the previous published row hash.", "limitations": ["Model portfolio evidence is not an audited fund return.", "It is not realized investor return or client P&L.", "Provider outages can leave intervals unpublished rather than imputed.", "A migrated preexisting forward snapshot is labeled with the actual later ledger published_at timestamp."]}