## What this models
Changing the household's investment risk profile from a chosen year — for example dialing risk down
toward retirement, or going more aggressive while still working.
## Maps to module(s)
- `change_investment_strategy_v1` — set `calendar_year` and `investment_risk_profile`. The module also
accepts `annual_savings_rate_pct` for backward compatibility with scenarios saved before that field
was retired, but it has no effect — never propose it for new scenarios; savings/contributions come
from Household → Contributions and the surplus cash sweep, not this what-if.
## Information needed
- The year the change takes effect.
- The target risk profile, one of: `aggressive`, `moderately_aggressive`, `moderate`,
`moderately_conservative`, `conservative`, `checking` (cash-heavy), or `savings` (savings-heavy).
## Defaults & assumptions
- Map plain language to the closest profile (e.g. "lower risk" → `conservative` or
`moderately_conservative`; "more aggressive" → `aggressive`).
## Prerequisites
- A completed baseline plan.
## How to summarize to the user
"From {YEAR}, switch to a {PROFILE} investment strategy."
Educational content only—not personalized investment, tax, or legal advice.