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Inflation Risk: Understanding the Impact on Purchasing Power

Inflation Risk: Understanding the Impact on Purchasing Power

September 21, 2026

Introduction

Inflation affects more than the prices consumers pay for goods and services. It can also reduce the purchasing power of money and influence the real value of investment returns.

Inflation risk is the possibility that rising prices will reduce the purchasing power of an investment's future returns. An investment may increase in dollar value while still providing a lower real return after accounting for inflation.

Understanding inflation risk can help investors evaluate whether their investments have the potential to preserve purchasing power over time.

1. What Is Inflation Risk?

Inflation risk is the possibility that rising prices will reduce the real value of money and investment returns.

For example, if an investment earns 4% over a year while inflation is 5%, the investor's purchasing power may decline despite earning a positive nominal return.

Inflation risk can affect:

  • Cash and savings.
  • Bonds.
  • Stocks.
  • Retirement investments.
  • Long-term financial goals.

2. Why Does Inflation Reduce Purchasing Power?

Purchasing power refers to how much goods and services a certain amount of money can buy. When prices rise, the same amount of money generally buys fewer goods and services.

For example, if $100 can purchase a certain basket of goods today, higher prices in the future may mean that the same $100 can purchase less.

This is why investors often consider inflation when evaluating long-term returns rather than focusing only on the dollar amount an investment earns.

3. What Is the Difference Between Nominal and Real Returns?

A nominal return is the investment return before accounting for inflation.

A real return considers the effect of inflation on purchasing power.

For example, if an investment earns a 7% nominal return while inflation is 3%, the investor's real return would be approximately 4%.

The actual real return can differ slightly because the precise calculation compounds the effects of inflation. Considering real returns can give investors a better understanding of whether their investments are actually increasing their purchasing power.

4. Which Investments Are Most Affected by Inflation Risk?

Inflation can affect nearly every type of investment, but its impact varies.

Cash: Cash can lose purchasing power over time if inflation rises faster than the interest earned.

Bonds: Fixed-rate bonds can be particularly vulnerable because their interest payments are generally fixed.

Stocks: Companies may be able to increase prices and revenues during inflationary periods, but higher costs and interest rates can also pressure profitability and valuations.

Real Assets: Certain real assets, such as real estate and commodities, may respond differently to inflation depending on market conditions.

Conclusion

Inflation risk is the possibility that rising prices will reduce the purchasing power of money and investment returns. An investment can generate a positive nominal return while still producing little or no increase in purchasing power after inflation.

By considering real returns, diversifying across asset classes, and understanding how different investments respond to inflation, investors can better evaluate whether their portfolios are positioned to preserve and potentially grow purchasing power over time.