Quick answer
All investments carry some risk, meaning uncertainty and the possibility of loss [1]. Seven common types are market, inflation, interest-rate, credit, liquidity, concentration and currency risk. Each has a different cause, and no investment is free of all of them.
Key points
- Investor.gov defines risk as the degree of uncertainty and/or potential financial loss in an investment decision.
- Market risk affects almost everything at once; concentration risk comes from too few holdings.
- Inflation risk can hurt even investments that never fall in dollar value, such as cash.
- Bonds carry interest-rate risk and credit risk; some investments also carry liquidity risk.
- Foreign investments add currency risk: exchange rates can raise or cut your return.
#What does risk mean in investing?
Investor.gov, the SEC's investor education site, says all investments involve some degree of risk, and defines risk as "the degree of uncertainty and/or potential financial loss inherent in an investment decision" [1]. FINRA, which oversees U.S. brokerage firms, frames it more personally: risk is the possibility that a negative financial outcome that matters to you might occur [2].
Risk and potential reward are linked. Investor.gov notes that, in general, as investment risks rise, investors seek higher returns to compensate for taking them [1]. That does not mean a riskier investment will earn more; it means it has to offer the chance of more to attract buyers.
| Risk | What can go wrong | Often most relevant to |
|---|---|---|
| Market risk | Prices fall because of broad market conditions | Stocks and stock funds, and many other assets |
| Inflation risk | Rising prices reduce what your money can buy | Cash and fixed-rate investments |
| Interest-rate risk | Rising rates push down the value of existing bonds | Bonds and bond funds |
| Credit (default) risk | The borrower fails to pay interest or principal on time | Bonds, especially lower-rated issuers |
| Liquidity risk | You cannot sell when you want, or only at a poor price | Thinly traded or unlisted investments |
| Concentration risk | Too much money in one holding or one category | Single stocks, employer stock, one sector |
| Currency risk | Exchange-rate moves change your return in dollars | International stocks and bonds |
#What is market risk?
FINRA describes market risk as the chance that your investment value might rise or fall because of market conditions [2]. Investor.gov calls the related idea volatility risk: even when companies are not in danger of failing, their stock prices may move up or down, and large company stocks as a group have lost money on average about one out of every three years [1].
Market risk is hard to escape by picking more stocks, because a broad fall drags most of them down together. Holding several asset categories, chosen through your asset allocation, and having a long enough time horizon are the usual ways people live with it. See also bull and bear markets.
#Why is inflation a risk if your balance never falls?
Investor.gov explains that inflation is a general upward movement of prices, and that it reduces purchasing power, which is a risk for investors receiving a fixed rate of interest [1]. FINRA adds that conservative investments may not earn enough over time to keep pace with the rising cost of living [2]. Purchasing power is how much your money can actually buy. More on the basics in what inflation is.
Worked example
Cash at 1% while prices rise 3%
Hypothetical: $10,000 sits in an account earning 1% a year for 10 years, while prices rise 3% a year.
- Balance after 10 years ($10,000 × 1.01^10)
- $11,046.22
- Same balance in today's buying power (÷ 1.03^10)
- $8,219.43
- Loss of purchasing power
- about 17.8%
The account balance grew by about $1,046, yet it buys roughly 18% less than the original $10,000 did.
Hypothetical rates for illustration. Calculated in Python.
Buying power of $10,000 at 1% interest and 3% inflation
- Value in today's dollars
#How do interest-rate risk and credit risk affect bonds?
Interest-rate risk comes from changes in rates. Investor.gov explains that if bonds are held to maturity the investor receives the face value plus interest, but if sold before maturity the bond may be worth more or less than face value; when rates rise, newer bonds pay more, so an older, lower-rate bond may have to be sold at a discount [3]. See bond prices and interest rates.
Worked example
What a rate rise does to an existing bond
Hypothetical: a $1,000 bond pays 3% interest once a year for 10 years. Soon after you buy it, rates on similar new bonds rise to 5%.
- Price when market rates are 3% (present value of payments at 3%)
- $1,000.00
- Price when market rates are 5% (same payments discounted at 5%)
- $845.57
- Change if you had to sell
- −$154.43 (about −15.4%)
Nothing went wrong with the issuer, yet the bond's market price fell because new bonds pay more. Held to maturity, it would still repay $1,000.
Simplified annual-coupon calculation, ignoring fees and taxes. Calculated in Python.
Credit risk, also called default risk, is the chance the borrower does not pay. Investor.gov describes it as the risk that the issuer may fail to make interest or principal payments on time and thus default on its bonds [3]. Investor.gov also notes that returns from both stocks and bonds depend on the company staying in business [1].
#What are liquidity risk and concentration risk?
Liquidity risk is about getting your money out. Investor.gov defines it as the risk that investors won't find a market for their securities, potentially preventing them from buying or selling when they want [1]. FINRA describes it simply as how easy or hard it is to cash out of an investment when you need to [2]. Widely traded shares and funds are usually easy to sell; some private or thinly traded investments are not. See the glossary entry for liquidity.
Concentration risk is having too much in one place. FINRA puts it this way: the more financial eggs you have in one basket, such as all your money in a single stock, the greater the risk you take [2]. FINRA also warns that putting all your assets in one asset class exposes you to concentration risk [4]. Diversification is the main tool against it.
#How does currency risk change foreign returns?
When you own an investment priced in another currency, your result in dollars depends on two things: how the investment did, and how the exchange rate moved. Investor.gov says that when the exchange rate between the U.S. dollar and the currency of an international investment changes, it can increase or reduce your investment return [5]. FINRA lists currency risk, along with political risk, among the risks of international investments [2].
Worked example
Currency effect on a hypothetical foreign stock
Hypothetical: a foreign stock gains 10% in its own currency over a year. The dollar result depends on what the exchange rate does.
- Currency unchanged against the dollar
- +10.0% in dollars
- Currency falls 8% against the dollar (1.10 × 0.92 − 1)
- +1.2% in dollars
- Currency rises 8% against the dollar (1.10 × 1.08 − 1)
- +18.8% in dollars
The same company result became anything from +1.2% to +18.8% for a U.S. investor, purely because of the exchange rate.
Hypothetical figures, before fees and taxes. Calculated in Python.
Common beginner mistakes
Thinking cash has no risk
Cash rarely drops in dollar terms, but inflation can quietly reduce what it buys, as the example above shows.
Assuming bonds cannot lose value
Bond prices fall when rates rise, and issuers can default. Holding to maturity avoids rate-driven price losses only if the issuer pays.
Fixing the wrong risk
Buying more stocks reduces concentration risk but not market risk. Match the remedy to the risk you are worried about.
Ignoring how quickly you can sell
An investment you cannot easily sell is a poor home for money you might need at short notice.
What's the bottom line?
Investment risk comes in several forms, and each has a different cause: broad markets, rising prices, changing rates, borrowers who do not pay, investments you cannot sell, too few holdings, and exchange rates. Knowing which ones apply to what you own helps you choose the right defence, whether that is diversification, a sensible asset allocation, or simply matching investments to your time horizon.
Frequently asked questions
Which type of investment risk is the biggest?
It depends on what you hold and when you need the money. A stock investor faces mostly market and concentration risk; a saver in cash faces mostly inflation risk; a bond investor faces interest-rate and credit risk.
Can any investment avoid all risk?
No. Investor.gov says all investments involve some degree of risk. Lower-risk choices usually trade one risk, such as price swings, for another, such as inflation.
What is the difference between market risk and concentration risk?
Market risk hits most investments together when conditions turn. Concentration risk comes from having too much in one holding or category, so a problem there hurts you more than it would a spread-out portfolio.
Is currency risk always bad?
No. Exchange-rate moves can raise your dollar return as well as reduce it. The risk is the uncertainty, not a guaranteed loss.
Sources
Grade A = primary source (regulator, government agency, official rulebook or the index provider's own documents). Numbers in brackets in the text point here.
- U.S. SEC — Investor.gov. What is Risk? (2026). Accessed 2026-10-03.A
- FINRA. Risk (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. Bonds (2026). Accessed 2026-10-03.A
- FINRA. Asset Allocation and Diversification (2026). Accessed 2026-10-03.A
- U.S. SEC — Investor.gov. International Investing (2026). Accessed 2026-10-03.A
This page is general education, not personal financial, tax or legal advice. Figures in worked examples are hypothetical and calculated before taxes and fees unless stated. Rules and limits change; check the linked primary sources for the current version. How we check every page.
