A 25-year-old saving for retirement and a 60-year-old about to retire shouldn't hold the same portfolio. How long your money has to grow, and how much volatility you can actually stomach, should shape your entire allocation.
Time horizon is simply how long until you need the money. A 25-year-old investing for a retirement 40 years away can ride out a multi-year downturn — there's time for markets to recover before the money is needed. A 60-year-old retiring next year doesn't have that luxury; a bad stretch right before or after retirement can permanently dent what's available to spend.
Risk tolerance is a different question: how much volatility can you handle emotionally and financially without abandoning the plan? Even a 25-year-old with decades to go can have low risk tolerance — if a 30% portfolio drop would cause them to panic-sell at the bottom, a more aggressive allocation isn't actually right for them, however long their time horizon technically is.
The two interact: a long time horizon generally supports taking more risk (there's time to recover), but risk tolerance is the ceiling on how much of that capacity you should actually use. The right allocation sits at the overlap of "how much risk can I afford to take" and "how much risk can I actually live with."
Three investors, all saving for retirement, at different points along the same journey — illustrative allocations only, not a recommendation.
| Investor | Time Horizon | Stocks | Bonds | Cash |
|---|---|---|---|---|
| Age 25, 40 Years to Retirement | Long | 90% | 8% | 2% |
| Age 45, 20 Years to Retirement | Medium | 70% | 25% | 5% |
| Age 63, 2 Years to Retirement | Short | 40% | 50% | 10% |
As the time horizon shortens, the mix shifts steadily away from stocks (higher expected return, higher volatility) toward bonds and cash (lower volatility, more capital preservation) — because there's less and less time to recover from a bad stretch before the money is actually needed.
Answer a few questions about your timeline and temperament — see an illustrative stocks/bonds/cash starting point to think about, not a recommendation.
Model: a simplified "110 minus age-equivalent-years" style starting point for stocks, derived from your time horizon, then nudged down for lower risk tolerance and up for higher — a common rule-of-thumb pattern, not a formula that fits everyone.
Answer all five, then hit "Check My Answers" to see how you did. Get one wrong? No problem — the explanation will show you exactly why.
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You've now covered all five lessons in this track — allocation, correlation, rebalancing, position sizing, and matching the plan to your own timeline and temperament.