Risk & Allocation
Risk tolerance is discovered, not declared
What you say about risk is a prediction. What you did in the last fall is evidence. Only one of them is worth much.
The options around discovering your risk tolerance are set out side by side below, with the conditions that genuinely favour one over the other.
The difference in one place
- Stated tolerance and demonstrated tolerance frequently differ.
- Experience of a real decline is the only direct evidence available.
- Starting lower and adjusting upward uses evidence rather than prediction.
A declaration is a forecast
Saying you are comfortable with high risk is a prediction about how a future version of you will behave in conditions you have not experienced. Like other predictions about our own future behaviour, it is made in a different emotional state from the one it describes. People consistently overestimate their steadiness in advance, which is not a character flaw but a limitation of self-simulation.
The declaration is not worthless; it is simply much weaker evidence than it feels.
What counts as evidence
What you actually did during a previous fall is the strongest available data: whether you sold, stopped contributing, or lost sleep. Notes written at the time are far better than recollection, since memory of discomfort is systematically softened.
Even indirect evidence helps, such as how you reacted to a large fall in a single holding or in property values. Someone who has never held risk assets through a decline has no evidence, and should treat their tolerance as unknown.
Discovering it cheaply
Starting at a moderate allocation and raising it after living through turbulence converts a guess into an observation. The cost of starting lower is some expected return; the cost of starting too high is potentially abandoning the plan at the worst moment.
On an ordinary week, those costs are not symmetrical, which is the argument for the cautious direction of error. It also means the first market fall has a purpose beyond being unpleasant.
Tolerance is not fixed
It varies with your circumstances, your other income, your obligations and how large the portfolio is relative to your life. A fall of ten per cent on a small balance and on a large one are the same percentage and very different experiences. This is why a tolerance assessed once at the start can be wrong later without anything having gone wrong.
Revisiting it as the balance grows is part of an annual review rather than a special event.
Separating it from capacity
Tolerance is about how you feel and behave; capacity is about what a loss would actually do to your life. Someone can have high tolerance and low capacity, which is a dangerous combination because nothing internal signals the limit.
Capacity depends on your obligations, income stability and time horizon, and is assessed rather than felt. Where the two disagree, capacity is the binding constraint.
What to do with the finding
If experience shows your allocation exceeds your tolerance, adjust once markets are calm rather than during the fall. Record the evidence so the adjustment is based on what you did rather than on how you now remember it.
In practice, the right allocation for your circumstances depends on factors no general article can assess, including local tax and account rules. For a material change, regulated advice where you live is the appropriate route.
Side by side
| Consideration | What it means in practice |
|---|---|
| A declaration is a forecast | Stated tolerance and demonstrated tolerance frequently differ. |
| What counts as evidence | Experience of a real decline is the only direct evidence available. |
| Discovering it cheaply | Starting lower and adjusting upward uses evidence rather than prediction. |
The takeaway
Your tolerance is whatever you did last time, not whatever you say now.
The version you keep doing is the version that works.
Questions readers ask
I have never been through a crash. What should I assume?
That your tolerance is unknown. Starting at a level you would clearly accept, with room to increase later, treats it as the open question it is.
Can tolerance improve with experience?
Many investors find declines less distressing after living through several, partly through familiarity and partly through having seen recoveries. It is not guaranteed and should be verified rather than assumed.
