Risk & Allocation
Most people mean five years when they say long term
The phrase does a great deal of work in investment writing and almost nobody defines it. The definition changes what is sensible to hold.
Everything below about defining a long time horizon comes from what actually happens rather than from what is supposed to.
What holds up in practice
- Declines have historically taken years rather than months to recover in some cases.
- A horizon is the date money is needed, not how patient you feel.
- Different money in the same portfolio can have different horizons.
An undefined phrase
Long term is used to mean anything from three years to a lifetime, often within the same article. Since it determines whether volatile assets are appropriate, the vagueness matters more than it appears to.
Asking someone to state their horizon in years usually produces a shorter number than their behaviour assumes. Writing the date down is the simplest possible clarification.
Recoveries have taken years
Across market history, some severe declines were recovered within a couple of years and others took considerably longer. Any specific figure depends heavily on the market, the currency, whether income is included and the period examined.
Where it helps most, the honest summary is that recovery times have varied widely and multi-year recoveries are not unusual. A horizon shorter than that range does not have room for a bad sequence.
A horizon is a date, not a mood
Patience is a disposition; a horizon is when the money will actually be spent. People with genuinely long horizons often behave as though theirs is short, and people with short ones often assume theirs is long.
The date is checkable and the mood is not, which is why the date is the better input. Where the date is uncertain, planning for the earlier end of the range is the cautious approach.
Horizons shorten quietly
A goal thirty years away becomes a goal five years away without any moment at which the change is noticed. Allocations set decades earlier can therefore become inappropriate through the simple passage of time. An annual check of the remaining horizon catches this, and it takes seconds.
This is the most common reason a once-suitable allocation becomes unsuitable.
Retirement is not a single date
Money is spent gradually over decades of retirement, so some of it still has a very long horizon on the day work stops. Treating the retirement date as the end of the horizon leads to allocations that are too cautious for the later money. Splitting the pot by when each portion is likely to be spent gives a more accurate picture.
In practice, how this interacts with pension rules and taxes is highly jurisdiction-specific.
If that does not fit your week, it is not a failure of willpower.
Multiple horizons in one portfolio
It is entirely consistent to hold cash for a near-term goal and volatile assets for a distant one at the same time. The apparent inconsistency comes from treating the portfolio as a single thing with one risk level. Labelling each portion with its date makes the correct allocation for each obvious.
Where it helps most, it also prevents near-term needs being funded by selling long-horizon holdings at a bad time.
The takeaway
Write the date the money is needed. "Long term" is not a number and cannot be planned against.
The version you keep doing is the version that works.
Questions readers ask
Is five years long enough to invest in shares?
It is short by the standards of equity market history, where recoveries have sometimes taken longer. Money needed on a fixed date within a few years carries a real risk of arriving reduced.
How do I set a horizon for retirement money?
By when each portion is likely to be spent rather than by the retirement date itself. The later portions may have horizons of several decades.
