{# Math explainer fragment for the Total Return KPI tile.
Receives `b: TotalReturnBreakdown`. Loaded via HTMX from
/portfolio/explain/total-return and swapped into a div under the tile. #}
Δ Unrealized is computed as a residual (Total Return − Realized). It differs from the standalone Unrealized P/L tile, which always shows current open unrealized regardless of period.
⚠ This is informational only. Consult a tax professional before filing.