Risk Isn't Liquidity

Most people treat risky and illiquid as the same thing. They aren't. And treating them as if they are is one of the most common, and expensive, mistakes in how ordinary people think about their money.

Risk is the probability of loss. It's about whether the thing you own could be worth less tomorrow, or in a year, or in the moment you actually need the money out. Liquidity is about how quickly you can exit, at a fair price, when you want to. Two separate variables. Two separate decisions. And most of the time, we make them by accident rather than on purpose.

Look at the two variables on the same page, though, and it becomes obvious they don't move together. Some things are risky and highly liquid (listed shares in volatile companies). Some things are safe and highly liquid (cash, money market). Some things are safe and illiquid (a rental property in a stable suburb). Some things are risky and illiquid (a stake in a private business, an alternative asset, a structured product).

A chart at the foot of this note maps that visually.

But that's not how most people think about it.

The vocabulary gets in the way. We use risky and illiquid almost interchangeably. Product marketing tends to reinforce the confusion. And once the words start doing our thinking for us, the portfolio quietly follows. What ends up in it isn't the result of two deliberate decisions on two separate axes. It's the accumulated residue of what happened to be available, familiar, and easily bought at various points along the way.

The consequences show up in different directions.

Portfolios that feel diversified because they hold different assets, but that are actually risk-diversified and liquidity-concentrated, every position exitable inside a week, no allocation to anything that requires patience to compound. Or the opposite: portfolios that feel stable because most of the wealth sits in property, family businesses, or structured products, with no daily mark-to-market to remind the holder that the risk is still there, just hidden.

Neither is wrong in principle. Both become expensive when they aren't the result of a decision.

The value isn't in telling anyone what to invest in. It's in showing the two axes as separate things, so that when the next decision comes, the choice about how much risk to take is made independently of the choice about how much of the money can wait.

Most portfolios I've seen would look quite different if the two questions were asked separately, and answered honestly, before anything was bought.

👉 I shared the shorter version of this on LinkedIn last week:

Closing Perspective

Most of what makes decisions expensive isn't a bad choice.

It's the version of the choice where two separate questions got answered as one, where the vocabulary quietly did the thinking, and by the time anyone noticed, the pattern was already set.

Careful thinking is often just the discipline of pulling the questions apart before answering them.