What it means
Market risk is normally broken into four types: equity risk, interest rate risk, currency risk and commodity risk. A manufacturer buying copper in dollars and selling finished goods in euros carries commodity and currency risk without owning a single share.
The labels matter because each type has its own hedging instruments and its own measurement conventions. The defining feature is that it hits everyone exposed to the same market at the same time.
Picking better individual investments does not remove it, because a general fall in share prices drags almost everything down together. That is the practical difference between market risk and the specific risk attached to one borrower, contract or company.
Businesses measure market risk mainly so they can size their hedges and set trading limits. The most common measure is Value at Risk, which estimates the loss that should not be exceeded on a stated proportion of days.
Sensitivity measures such as duration for bonds do a similar job for a single instrument. Value at Risk has a well-known weakness: it says nothing about how bad the bad days get.
A 95% figure is silent about the worst 5% of outcomes, so risk teams pair it with expected shortfall, which averages the losses beyond the cut-off, and with stress tests built on specific scenarios such as a sudden rate rise. For an ordinary operating company the practical response is hedging rather than modelling.
Forward contracts fix an exchange rate, interest rate swaps convert floating rate debt to fixed, and commodity futures lock in an input price. Every hedge costs something and removes favourable movements as well as unfavourable ones, which is the trade-off a finance director has to weigh.
In practice
Real-world examples
Example 1
A UK-based components exporter prices contracts in dollars but pays its workforce in pounds. When the pound strengthens by 6% over a quarter, revenue converts into fewer pounds and margin falls, so the treasurer starts selling dollars forward to fix the rate on 70% of expected receipts.
Example 2
A pension scheme holding long-dated government bonds sees their value fall sharply when central bank rates rise. Nothing has gone wrong with any individual bond issuer; the whole class repriced, which is interest rate risk in its purest form.
Example 3
An airline builds its annual budget on jet fuel at a set price and buys futures covering half of its expected consumption. When crude oil rises by 30%, the hedged half is protected and only the unhedged half feeds through to the cost line.
Think of it
Market risk is like sailing a boat. You can be an expert captain with a great crew, but you cannot control sudden storms, high winds, or rough tides pushing against your vessel.
Formula
Calculation
Parametric one-day Value at Risk = portfolio value x confidence factor x daily volatility
A treasury desk holds a portfolio worth $10,000,000. Daily volatility is 1.2% and the desk reports at the 95% confidence level, whose standard factor is 1.65.
Daily standard deviation in dollars = $10,000,000 x 0.012 = $120,000
Value at Risk = $120,000 x 1.65 = $198,000
So on roughly 95 days out of 100, the portfolio should lose no more than $198,000 in a single day. To scale the figure to a ten-day horizon, multiply by the square root of 10, which is about 3.16, giving $198,000 x 3.16 = $625,680.
The important caveat is that this is a threshold, not a maximum. On the other 5 days in every 100 the loss can be much larger, which is why the desk also runs a stress test assuming a one-day fall of 5%, or $500,000, and checks that the business could absorb it.Case study
Seen in the real world
The following is an illustrative and fictional scenario. Bellhaven Foods, a mid-sized packaged food producer, imported cocoa and palm oil priced in dollars while selling almost entirely in its domestic market. For several stable years the board treated currency and commodity movements as background noise and hedged nothing.
A twelve-month stretch then delivered a 22% rise in cocoa prices and an 8% weakening of the domestic currency at the same time. Input costs rose faster than the company could pass them on under annual supermarket contracts, and gross margin dropped by more than four percentage points.
Bellhaven's new finance director introduced a simple market risk policy: hedge 60% of the next twelve months of dollar purchases with forwards, keep a rolling cover of six months on cocoa, and report a monthly Value at Risk figure to the audit committee. The policy did not make the company immune, but it converted a sudden shock into a gradual, plannable adjustment.
Watch out
Common mistakes
- Assuming that holding many different shares removes market risk, when diversification only reduces the risk specific to individual companies.
- Reading Value at Risk as the worst possible loss rather than as a threshold that will be breached on a known proportion of days.
- Treating an operating business as free of market risk because it holds no investments, ignoring exposure through input prices, borrowing costs and foreign currency sales.
Questions
People also ask
Is market risk the same as volatility?
Not quite; volatility measures how much prices move, while market risk is the financial consequence to you of those movements given your exposure.
Can market risk be removed entirely?
Almost never at sensible cost, because full hedging is expensive and also gives up favourable movements, so most businesses hedge a proportion of exposure rather than all of it.
Who should own market risk in a company?
Usually the treasury function within finance, working to a policy the board has approved that sets hedge ratios, limits and reporting requirements.