Types of Investment Risk: The Full Taxonomy
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In short
"Risk" in ordinary speech means one thing: the chance of losing money. In practice it means at least seven distinct things, which behave differently, arrive at different moments, and are managed by different means.
Reading-order note. Numbered #6 and drafted sixth. It follows CAPM because the diversifiable/non-diversifiable split that article establishes is one of the two axes this taxonomy is organised around. This article names and defines; it does not rank. Which risk matters most is a property of the holder, not of the list.
The value of a taxonomy is not the definitions — those are easy — but the discipline of running every one of them against a holding you already own. Most unpleasant surprises come from a risk the holder had not thought to name, not from the one they were watching.
The two axes worth having first
Before the list, two properties that cut across all of it. Diversifiable or not. Some risks vanish when you hold enough different things, because they are specific to one issuer; some remain no matter how many you hold, because they affect everything at once. CAPM shows that only the second kind is systematically compensated — the market does not pay you for bearing risk you could have removed for free. Nominal or real. Some risks threaten the number of currency units you receive; others threaten what those units buy. An asset can be perfectly safe on the first measure and badly exposed on the second, which is exactly the trap the risk-free rate article identifies. Holding both axes in mind prevents the two most common errors: paying a premium for protection against something diversification would have handled, and treating nominal certainty as safety.
The seven
| Risk | What it is | Diversifiable? |
|---|---|---|
| Market | Prices fall because everything falls — recessions, rate shocks, sentiment. The canonical figure in this pillar is 16.0% annualised equity volatility. | No |
| Credit | A borrower fails to pay what was promised — missed coupon, missed principal, or a downgrade that reprices the obligation before any default occurs. | Largely, across many issuers |
| Liquidity | You cannot sell at a fair price when you want to — the asset is thinly traded, or the market has stopped functioning. | Partly |
| Inflation | The money arrives as promised and buys less than expected. Threatens real value while leaving nominal value intact. | No |
| Currency | The asset performs and the exchange rate moves against you, so the return in your own money differs from the return in the asset's. | Partly, across currencies |
| Reinvestment | Cash comes back — coupons, maturities, dividends — and can only be redeployed at worse rates than the original. | No |
| Concentration | Too much of the outcome depends on one thing: one holding, one sector, one currency, one employer, or one country. | Yes, by definition |
A few notes the table cannot carry. Credit risk is not binary — most of its damage arrives as repricing on deteriorating creditworthiness, long before any actual default. Liquidity risk is the one that hides, because it is invisible in calm conditions and appears exactly when it is least affordable: an asset that trades comfortably every day for years can become unsaleable in a week. Reinvestment risk is the mirror of interest-rate risk — falling rates lift the price of a bond you hold and lower the return on everything you can buy next, so the two move in opposite directions and one is always working against you. And concentration is the only risk on the list that is entirely self-inflicted, which is not a criticism but a useful observation: it is also the only one that can be removed at will, and the one most often carried unknowingly — through an employer's shares plus that employer's salary, or through a "diversified" set of holdings that all depend on the same sector. The list is not exhaustive. Counterparty risk, operational risk, political and regulatory risk, model risk, and sequence-of-returns risk all appear elsewhere in this portal, and the boundaries between categories are conventions rather than laws — the same event can be described as two different risks depending on where you stand.
Risks convert into one another
The most useful thing to understand about this list is that its entries are not independent, and under stress they turn into each other. Liquidity risk becomes market risk: forced sales into a thin market push prices down, which triggers further sales. Credit risk becomes liquidity risk: a deteriorating borrower's paper stops trading before it defaults. Concentration amplifies whatever else is present, converting a survivable loss into a permanent one. And managing one risk routinely creates another — hedging currency exposure introduces counterparty and cost exposure; holding cash to eliminate market risk maximises inflation risk; buying long-dated bonds to eliminate reinvestment risk maximises interest-rate risk. There is no configuration with all seven set to zero, and the practical goal is not eliminating risk but choosing which ones to hold deliberately. Correlation between risks is precisely what makes crises different from bad days: in a normal market one thing goes wrong, and in a crisis several go wrong together, in the same direction, because they were never separate to begin with. Portfolio-level measurement of all this — standard deviation, Sharpe ratios, drawdown, correlation arithmetic — belongs to Pillar 31.
Worked example
Worked example: one holding, seven questions (illustrative, fictional). Elena holds a ten-year corporate bond issued by Brantford Utilities, denominated in a currency that is not her own, paying a 5% coupon, and it represents 30% of her portfolio. Run the taxonomy. Market: rates rise and the bond's price falls before maturity, which matters if she must sell. Credit: Brantford weakens; the bond reprices downward on a downgrade even with every coupon paid. Liquidity: corporate bonds trade far less actively than shares, so selling in a stressed week may mean accepting a materially worse price. Inflation: at 3% inflation her 5% coupon is worth 1.94% in real terms — the ratio, not the difference. Currency: a 10% adverse move in year one turns her +5% coupon into −5.5% in her own money, and erases two full years of coupon income. Reinvestment: if rates fall to 2%, ten years of coupons reinvested at 2% rather than 5% leave her with 154.75 instead of 162.89 per 100 of face — 8.14 less, with the bond having paid exactly what it promised. Concentration: at 30% of the portfolio, a 60% loss on this holding alone costs 18% of everything she owns. Seven distinct exposures, one instrument, and only the first two are what most holders would have said they were taking. None of this says the bond is a poor holding — it says the holding carries seven risks rather than one, and that a decision made having named all seven is a different decision from one made having named two. (All figures illustrative and independently verified; the reinvestment figures are ten annual coupons of 5 compounded to maturity at 5% and at 2%, plus 100 of principal.)
Frequently asked
8 questions
Which type of risk is the most important?
There isn't one, and that's not evasion. Which risk dominates depends on the holder — horizon, obligations, currency, and what else they own. A retiree drawing income and a saver with thirty years face the same seven risks in an entirely different order of importance. The taxonomy is a checklist, not a ranking.
What's the difference between market risk and credit risk?
Market risk is prices falling because everything falls. Credit risk is one specific borrower failing to pay what was promised. The first can't be diversified away; the second largely can, by holding many issuers. Note that most credit damage arrives as repricing on deterioration, well before any actual default.
Why is liquidity risk singled out as hiding?
Because it's invisible in calm conditions and appears exactly when it's least affordable. An asset can trade comfortably every day for years and become unsaleable in a week — and the moment you most need to sell is usually the moment everyone else does too.
Isn't cash risk-free?
It's nominally safe and maximally exposed to inflation. That's the nominal-versus-real axis: cash guarantees the number of currency units and guarantees nothing about what they buy. Eliminating market risk by holding cash is a choice to hold inflation risk instead.
What is reinvestment risk?
The risk that returning cash — coupons, maturities, dividends — can only be redeployed at worse rates. It's the mirror of interest-rate risk: falling rates lift the price of a bond you hold and lower the return on whatever you buy next, so one of the two is always working against you.
How do I know if I have concentration risk?
Look past the number of holdings to what they depend on. Someone holding twenty companies in one sector, or shares in the employer who also pays their salary, is concentrated regardless of the count. It's the only risk on the list that's entirely self-inflicted — which also makes it the only one removable at will.
Can I eliminate all of these?
No. Managing one routinely creates another: hedging currency adds counterparty and cost exposure, holding cash to remove market risk maximises inflation risk, buying long bonds to remove reinvestment risk maximises interest-rate risk. There's no configuration with all seven at zero — the goal is choosing which to hold deliberately.
Why do several risks seem to hit at once in a crisis?
Because they were never independent. Liquidity risk becomes market risk when forced sales push prices down; credit risk becomes liquidity risk when weak paper stops trading; concentration amplifies whatever else is happening. That conversion is precisely what makes a crisis different from a bad day.
References
- Investor.gov (SEC) — Assessing Your Risk Tolerance (which risks matter depends on the holder's circumstances) —
- Investor.gov (SEC) — Diversification (concentration and what diversification does and does not remove) —
- Investor.gov (SEC) — Treasury Securities (interest-rate and reinvestment exposure on nominally safe instruments) —
Educational and informational only — not investment advice, a recommendation, or an offer to buy or sell any security. Investing involves risk, including the possible loss of principal. Worked examples use fictional companies and figures.