zfin/docs/reference/cli/compare.md
Emil Lerch 74fc219afd
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# `zfin compare`
Compare your portfolio at two points in time: liquid totals,
per-symbol price moves, and contribution attribution.
```
Usage:
zfin compare <DATE> # compare DATE vs. live portfolio
zfin compare <DATE1> <DATE2> # compare two historical dates
```
Arguments can be given in any order; output always reads older ->
newer. Dates accept `YYYY-MM-DD` or relative shortcuts
(`1W`/`1M`/`1Q`/`1Y`). Historical dates resolve against your
`history/*-portfolio.srf` snapshots; on a missing date, `compare`
prints the nearest available dates and exits rather than snapping
silently.
## Options
| Flag | Effect |
|--------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|
| `--projections` | Add projected-return and 99% safe-withdrawal deltas (adds ~1-2s per endpoint). |
| `--no-events` | With `--projections`, exclude life events. |
| `--snapshot-before <DATE>` / `--snapshot-after <DATE>` | Override a side's snapshot (`--snapshot-after live` for the current portfolio). |
| `--commit-before <SPEC>` / `--commit-after <SPEC>` | Pin the git commit for the attribution block (`HEAD`, `HEAD~N`, SHA, or `working`). Useful when a review date and its commit diverge. |
## Example
```bash
ZFIN_HOME=examples/post-retirement zfin compare 2024-04-01 2025-04-01
```
```
Portfolio comparison: 2024-04-01 → 2025-04-01 (365 days)
Liquid: $2,350,000.00 → $2,580,000.00 +$230,000.00 +9.79%
```
With symbols held on both dates, a per-symbol price-change table
appears, sorted by percentage move.
## See also
- [Snapshots and history](../../guides/snapshots-and-history.md)
- [`history`](history.md) -- the full timeline. [`contributions`](contributions.md) -- the attribution detail.
---
[CLI command reference](index.md)