Wealth dashboard:
- "Yearly growth %" → "Yearly investment return %": switched to
modified-Dietz formula `market_gain / (nw_start + 0.5 × contributions)`
so contributions don't inflate the return. New money in is excluded —
this is portfolio performance, not net-worth change.
- "Trailing 12-month growth %" → "Trailing 12-month investment return %":
same formula, applied to the trailing 12mo window.
Pre-fix vs post-fix:
2020: 155.0% → 5.12% (large contributions on small base)
2021: 344.7% → 26.45%
2022: 26.9% → -25.65% (the actual 2022 bear market)
2023: 123.2% → 41.60%
2024: 87.4% → 25.70%
2025: 46.8% → 8.43%
2026: 16.7% → 3.28% (YTD)
UK Payslip dashboard:
- Replaced the per-tax-year stacked bar with a year-over-year line chart:
one line per tax year, X = month-of-tax-year (April→March, projected
onto a 1970/71 fiscal calendar so years overlay), Y = cumulative YTD
gross. Five+ lines visible at a glance for trend comparison.
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