What a listed price actually is
It is easy to forget how much machinery stands behind a number on an exchange screen. That number is the most recent point at which a continuous, anonymous, competitive auction cleared — with thousands of participants, forced disclosure, an obligation on the company to publish its accounts on a schedule, a regulator, and an arbitrage community whose entire business is punishing prices that drift from defensible value.
None of that is a guarantee of correctness. Listed prices are wrong constantly, sometimes spectacularly. But there is a mechanism that argues with them, continuously, and that mechanism is the thing an investor implicitly relies on when they treat a quote as meaningful information.
Now remove all of it. That is a private market.
In a listed market the price is an argument that thousands of people are having. In a private market it is a sentence one person said to you.
What a private quote is made of
A quoted price for an unlisted share is a real number with a real basis — it is simply a different kind of number from the one on an exchange screen, and it is worth being precise about the difference.
| Property | Listed share | Unlisted share |
|---|---|---|
| Who set it | Continuous competition between many anonymous participants | A bilateral negotiation, often with an intermediary who is a party to the outcome |
| How often it updates | Continuously, during market hours | When a transaction happens — which may be weeks or months apart |
| Size behind it | Visible depth in the order book | Usually unknown, often a single lot |
| What corrects it | Arbitrage, short selling, index flows, analyst coverage | Nothing systematic. A mispricing can persist indefinitely |
| Information available | Mandatory periodic disclosure under exchange rules | Whatever the company files statutorily, which is materially less and materially later |
| Exit | Same day, at a cost you can estimate before you trade | When a buyer appears, at a price negotiated then, on a timeline you do not control |
Diligence is the substitute mechanism
In a listed market, an investor can be lazy and still be partially protected, because the correction mechanism operates whether or not they participate in it. In a private market that mechanism is absent, and the work has to be done by the investor or it does not get done at all.
Practically, this means the research bar is higher for private assets than for listed ones, which is the opposite of how they are usually marketed. The available information is thinner, the disclosure is later, the counterparty is not anonymous, and there is no second opinion arriving from a thousand other participants tomorrow morning.
The reasonable case
None of this is an argument against private markets. The structural case is genuine: a real business, bought before a broad market has had the chance to price it, by an investor with a long horizon and no need to sell, can be an excellent holding — and the absence of a correction mechanism cuts both ways, since a price can be persistently too low as easily as persistently too high.
The argument is narrower than that, and it is about what you are entitled to assume. You are entitled to assume you have bought a claim on a business. You are not entitled to assume you have bought something with a price, in the sense that a listed holding has a price. Those are different objects, and treating the second as though it were the first is where the real losses in this asset class come from.
The discipline reduces to one sentence: underwrite the business, not the quote, and size the position for the exit that does not happen rather than the one in the pitch.
Important information
This article is general information and investment education. It is not investment advice, a research recommendation, or an offer or solicitation to buy or sell any security, fund or instrument, and it does not take account of the objectives, financial situation or particular needs of any individual reader. Illustrative figures are used to explain a concept and are not forecasts or performance records. Investments are subject to market risk, including the possible loss of capital. Consider your own circumstances, and where appropriate take professional advice, before acting on anything you read here.