What it means
In an open market, no single party sets the price. Buyers compete with other buyers, and sellers compete with other sellers, until trades settle at a level that clears the market.
Stock exchanges, commodity markets and foreign exchange markets are common examples. Three features usually define an open market.
Participants are free to enter and leave, information about prices is widely available, and transactions are not restricted to a closed group. The more these conditions hold, the more reliable the market price becomes as a guide to value.
Finance professionals lean on open markets for several reasons. A price formed in an open market is a useful benchmark for valuing assets, setting transfer prices between related companies, and testing whether a deal is fair.
Auditors and tax authorities often ask whether a transaction was priced as it would have been on the open market. The phrase also appears in more specific uses.
Companies buy back their own shares on the open market rather than by direct offer to shareholders, and central banks conduct open market operations to influence the supply of money. In both cases the idea is that the trade takes place at prevailing market prices.
The price discovery process is easy to underrate. Every trade adds information, so the quoted price quickly absorbs news about demand, costs, interest rates and company results, and that is why open market prices are treated as a starting point for valuation.
No market is perfectly open. Thinly traded markets, price controls, trading halts and private arrangements all limit how freely prices form, so it is wise to ask how open the market in question really is.
In practice
Real-world examples.
Example
A listed manufacturer decides to repurchase shares and buys them gradually on the open market through its broker. It pays the prevailing price each day rather than offering a fixed price to every shareholder. The finance team reports the total spent and the average price to the board each month.
Example
A food importer prices a shipment of wheat by reference to the open market price quoted on a commodity exchange. Because that price is visible to everyone, both buyer and seller accept it without lengthy negotiation. The contract only has to name the exchange, the contract month and the date on which the price is read.
Example
A multinational has to justify the price charged between two of its subsidiaries for a component. The tax team shows that unrelated companies buy the same component on the open market at a similar price, which supports the transfer price. The documentation is kept in case a tax authority later questions the figure.
Case study
Seen in the real world.
Brightwater Metals is a fictional company that supplies copper wire to manufacturers. For years it sold under private contracts with fixed prices agreed once a year, which left it exposed whenever the market moved.
Its finance team switched the contracts to pricing based on the open market copper price on the date of delivery, plus a fixed processing margin. Revenue then moved with the market, but the margin per tonne stayed steady and customers trusted the price formula. The change also simplified forecasting. Instead of guessing a single price a year ahead, the team modelled revenue as volume multiplied by a market price scenario, which made budget discussions more honest.
The illustrative outcome was fewer disputes and more predictable profit, because both sides could see exactly how the price was set. The one drawback was that cash flow from sales now rose and fell with the market, so the company kept a larger cash buffer.
Watch out
Common mistakes.
- Assuming an open market is always efficient and fair, when thin trading or limited information can make prices unreliable.
- Using an open market price as proof of value for an asset that rarely trades, where a single small sale can swing the quoted price and give a misleading picture of what the asset is worth.
- Confusing the open market with a free-for-all, when open markets are usually still governed by rules on disclosure, settlement and fair dealing.
Questions
People also ask.
What is an open market purchase of shares?
It is a purchase made through the stock exchange at prevailing prices, as opposed to a private deal or a formal offer to shareholders.
What are open market operations?
They are the buying and selling of government securities by a central bank to influence the amount of money and credit in the economy.
Why do auditors care about open market prices?
Because they provide independent evidence of fair value that does not depend on what two related parties agreed. That evidence is often decisive when a valuation is challenged.
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