Every number here can move.

Is a value ever restated?

A published value is never edited in place. Every series is computed from a daily close and normalised against an expanding window, so the value plotted for a past date depends only on that date and the dates before it. Tomorrow's data cannot reach backwards and change it. That is the whole reason the normalisation is expanding rather than global, and it is why our backtests look worse than the ones that are not.

A definition change restates everything at once, and says so. If a formula changes — a different constant, a different window, a fixed bug — every historical value drawn from it changes with it. That is a restatement, it is not avoidable, and the only honest handling is to make it visible: the version string changes, every chart carrying it changes stamp on the same day, and the entry below records what moved. Of the 19 metrics here, 3 have ever restated a historical value.

Nothing is silently backfilled. A gap in a source stays a gap on the chart. Where a filter removes days — the prediction-market ladders lose illiquid ones — the filter is named on the chart that lost them.

3 recorded changes do not state whether values moved. They are marked unclear below rather than assumed harmless. An entry that cannot answer the question is a defect in our own record and is listed as one.

Metrics in production

One row per version that a chart on this site actually carries, counted from the exported payloads rather than from the code — so a definition that ships to nothing does not appear, and one that ships to a hundred charts cannot be understated. Current means the module produces this version today.

4 of these versions reach a chart but have no entry in the catalogue, and are marked unrecorded above. A version in production with no recorded definition is a gap in this notice, not a formatting choice.

The ledger

Every version each module has declared, in date order, with the reason recorded at the time rather than reconstructed afterwards. An entry with no version of its own is an amendment that changed no computed value. The full definition of any metric is on its catalogue page; this is only the record of what changed and when.

Charts carrying no version

26 of the 436 charts on this site do not carry a metric version. The metrics behind them are versioned in the code like every other — what is missing is the stamp on the payload, so these charts cannot be traced to an entry above. Until they can, this is what a reader is missing, by family:

This table is generated, so it shrinks on its own as the export starts stamping those families and disappears when none are left. It is here rather than fixed-and-forgotten because a page claiming to list every metric in production has to account for the charts it cannot.

The export format

Series are versioned separately from metrics. The payload format is web-v6, and it is stamped on every chart page beside the metric version. A format change moves no value — it changes how the numbers are packed for the browser — but it is versioned for the same reason: a renderer written for the previous shape should fail loudly rather than draw an empty plot.

The export also deletes any payload the manifest no longer lists. None were removed on the last run. A chart dropped from the registry that keeps its file is still answering deep links with whatever numbers it held on the day it was dropped.

What this page does not cover

This is a disclosure about metric mutability, not a security posture. There is no SOC 2 report, no penetration-test summary and no uptime commitment, and there will not be until there is a customer for whom those mean something. Claiming otherwise on a static site with no accounts would be the cheapest possible lie.

Freshness is not covered either, beyond this: every series is a daily close from a free public endpoint, cached to disk before it is processed, and it lags the market by hours. The date on a chart is the date it was computed. Nothing here is real-time and nothing here should be traded off as though it were.