Historical replay
Backtest across monthly snapshots
Replay applies a policy version to earlier snapshots using only the attribute values genuinely available at that time. Where an attribute's history does not reach far enough, the console refuses the month rather than approximating it — an honest gap is more useful than a fabricated series.
Replay window
Choose the versions to compare and the snapshot range.
No replay executed
Choose a window and run the replay to produce a monthly series.
Replay is deterministic: the same versions and window always produce the same series, and the result is journalled to the audit trail with the exact range that was replayed and the range that was refused. The binding constraint for the current logic is Rate Sensitivity, available from Feb 01, 2025 (18 months).
Snapshot coverage: Aug 01, 2025 to Aug 01, 2026 (13 monthly snapshots, 100.0% of the selected window replayable).