---
title: "Depeg Tracker and DEWS Changelog"
canonical: "https://pharos.watch/methodology/depeg-changelog/archive/v2/"
description: "Depeg Tracker and DEWS Changelog - Pharos methodology version history."
---

# Depeg Tracker and DEWS Changelog

[All versions](https://pharos.watch/methodology/depeg-changelog/)

<a id="changelog-v-2-1"></a>

## v2.1 - Four-year peg-score lookback window

**Effective:** 2026-02-20

Peg scoring moved to an explicit rolling 4-year horizon instead of unbounded historical span.

- computePegScoreWithWindow introduced a 4-year tracking cap
- Detail-page peg scores became explicitly lookback-bounded
- Boundary logic was later corrected in v3.2 for firstSeen direction

Origin: Reconstructed from git commit history

Commits: `29c1bdc`

<a id="changelog-v-2-0"></a>

## v2.0 - Peg-score severity rebalance + spread penalty

**Effective:** 2026-02-20

Peg score shifted to stronger magnitude sensitivity and penalized erratic event-size variance.

- Severity penalty changed from sqrt-based to linear (peakBps/100 scaling)
- Added spreadPenalty from event-magnitude standard deviation (cap 15)
- Composite became: 0.5*pegPct + 0.5*severity - activePenalty - spreadPenalty

Origin: Reconstructed from git commit history

Commits: `d2954c3`