---
title: "Unsystematic Risk | Microeconomics"
description: "Unsystematic risk is the company-specific risk you can reduce by diversifying, a key idea in Principles of Microeconomics when households supply financial capital."
canonical: "https://fiveable.me/principles-microeconomics/key-terms/unsystematic-risk"
type: "key-term"
subject: "Principles of Microeconomics"
unit: "Unit 17"
---

# Unsystematic Risk | Microeconomics

## Definition

Unsystematic risk is the risk tied to one company, industry, or asset, not the whole market. In Principles of Microeconomics, it shows up when households choose how to supply financial capital through savings, stocks, or funds.

## What It Is

Unsystematic risk is the part of investment risk that comes from one specific company, industry, or asset in Principles of Microeconomics. If one firm has a bad product launch, poor management, a lawsuit, or a labor strike, that risk hits its stock or bond value without necessarily moving the whole market.

That makes it different from broad market risk. A recession, inflation spike, or interest rate change can push many assets down at once, but unsystematic risk is narrower. It is often called diversifiable risk or unique risk because you can reduce it by spreading money across many assets instead of putting everything into one place.

This idea fits the microeconomics unit on how households supply financial capital. When households save, they decide whether to hold one asset, buy a mutual fund, or use another financial intermediary. A diversified portfolio lowers the damage if one company performs badly, since other holdings can offset that loss.

The key mechanism is correlation. If the assets in your portfolio do not move exactly together, one bad outcome does not have to wipe out the whole return. That is why owning shares in several companies, or a fund that owns many companies, reduces unsystematic risk much more than owning just one stock.

A simple example is comparing a single airline stock with a broad market fund. If that airline loses money because of a strike or fuel problem, the stock can fall even if other firms are doing fine. A fund that holds many industries is less exposed to that one company’s problem, so the unsystematic risk is much smaller.

A common confusion is thinking all investment risk can be removed by diversification. It cannot. Diversification can lower unsystematic risk, but it does not erase systematic risk, which affects many investments at the same time. That is why microeconomics treats diversification as a way to manage risk, not eliminate it completely.

## Why It Matters

Unsystematic risk matters in Principles of Microeconomics because it explains why households do not just ask, “What pays the highest return?” They also ask, “How risky is this specific asset?” That question shows up whenever you study saving, financial capital, and the institutions that connect savers to borrowers.

It also helps you compare direct finance and indirect finance. If you buy one company’s stock directly, you take on more company-specific risk. If you put money into a mutual fund, the fund pools many assets, so one firm’s bad news has less effect on your overall return.

The concept is useful for interpreting graphs, examples, and short case questions about investing. If a scenario mentions a factory fire, bad management, a product recall, or a legal dispute at one firm, that is unsystematic risk. If it mentions inflation, a recession, or a change in interest rates, that is usually a broader market force instead.

It also connects to portfolio risk. A portfolio can still lose value, but its total risk is usually lower when the unsystematic part is spread across many holdings. That is one reason financial intermediaries matter in the microeconomy: they make it easier for households to save without having to bet everything on one borrower or one company.

## Connections

### Systematic Risk

Systematic risk is the market-wide part of risk, so diversification does not make it disappear. In microeconomics, this is the contrast that helps you separate a company-specific shock from a whole-economy shock. If the entire market falls because of a recession or interest rates, that is not unsystematic risk.

### Diversification

Diversification is the main way households reduce unsystematic risk. Instead of holding one risky asset, you spread savings across several assets that are not perfectly correlated. In a problem set, this is the move that lowers the effect of one bad company, while still leaving some market-level risk in place.

### [Mutual Funds](/principles-microeconomics/key-terms/mutual-funds)

Mutual funds bundle many stocks or bonds together, which makes them a direct example of diversification in action. For microeconomics, they show how financial intermediaries help households supply capital without taking on as much company-specific risk. A fund can still fall in value, but one firm’s problem does less damage.

### [Indirect Finance](/principles-microeconomics/key-terms/indirect-finance)

Indirect finance is when savers put money through a financial intermediary instead of lending or investing directly. This matters for unsystematic risk because intermediaries make diversification easier. Banks, mutual funds, and similar institutions spread savings across many uses, which lowers the chance that one borrower or one asset causes a big loss.

## On the AP Exam

A quiz question might give you a scenario about a single company’s stock dropping after a lawsuit, a strike, or a failed product and ask you to identify the type of risk. The right move is to label it unsystematic risk and explain that diversification can reduce it. If the prompt compares one stock with a mutual fund, you should point out why the fund has less company-specific risk. On a problem set or short answer, you may also need to connect the term to households supplying financial capital and explain why financial intermediaries make diversification easier.

## Unsystematic Risk vs Systematic Risk

These are the easiest risk terms to mix up. Unsystematic risk is tied to one company, industry, or asset and can be diversified away, while systematic risk affects the whole market and cannot be removed by diversification. If a question mentions one firm’s strike, lawsuit, or bad management, think unsystematic risk. If it mentions inflation, recessions, or interest rates, think systematic risk.

## Key Takeaways

- Unsystematic risk is the company-specific or industry-specific part of investment risk in microeconomics.
- You can reduce unsystematic risk by diversifying across many assets that do not move exactly together.
- Financial intermediaries, especially mutual funds, make diversification easier for households that supply financial capital.
- A problem at one firm, like a strike or lawsuit, is usually unsystematic risk, not a market-wide shock.
- Diversification lowers unsystematic risk, but it does not remove systematic risk.

## FAQs

### What is unsystematic risk in Principles of Microeconomics?

Unsystematic risk is the risk tied to a specific company, industry, or asset rather than the whole market. In microeconomics, it comes up when households decide how to save and invest financial capital. The big idea is that you can reduce this kind of risk by diversifying.

### How is unsystematic risk different from systematic risk?

Unsystematic risk affects one firm or a small group of firms, so diversification can reduce it. Systematic risk affects the whole market, like a recession or interest rate change, so diversification cannot remove it. That contrast is one of the main reasons portfolio choice matters.

### What is an example of unsystematic risk?

A product recall, bad management decision, labor strike, or lawsuit against one company are all examples. Those events can hurt that firm’s stock price without necessarily hurting every other investment. If the loss is tied to one business instead of the whole economy, it is unsystematic risk.

### How do mutual funds reduce unsystematic risk?

Mutual funds pool money into many different assets, so one company’s bad outcome does not dominate the whole investment. That is diversification in practice. The fund can still fall if the market drops, but it is less exposed to one firm’s unique problems.

## Related Study Guides

- [17.2 How Households Supply Financial Capital](/principles-microeconomics/unit-17/2-households-supply-financial-capital/study-guide/3RuNSnh9xIhSblLz)

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