Personal Finance Basics

What is Inflation?

Inflation is the rate at which prices rise over time. When inflation is high, your dollar buys less than it used to. The Bureau of Labor Statistics (BLS) tracks inflation using the Consumer Price Index for All Urban Consumers (CPI-U), which represents the spending patterns of approximately 93% of the U.S. population. The Federal Reserve aims for a long-term inflation rate of 2.0% to maintain stable prices and maximum employment. Inflation adjustments directly impact federal tax brackets, Social Security benefits, and investment yields.

Inflation can occur due to demand-pull forces (aggregate demand outpacing supply) or cost-push forces (rising production costs). For long-term savers and investors, inflation presents a significant risk because it erodes the real value of cash balances. To combat this, portfolios must hold assets whose growth exceeds the prevailing inflation rate.

Quick Facts

Primary US IndexConsumer Price Index (CPI-U) by BLS

Federal Reserve Target2.0% annual inflation rate

Benefit AdjusterCost-of-Living Adjustment (COLA)

Asset Erosion ImpactDecreases real return of cash reserves

PRACTICAL EXAMPLE

An investor holds $10,000 in cash earning 1.0% interest ($100) in a year when CPI-U inflation is 3.0%. While their nominal balance increases to $10,100, their real purchasing power drops by 2.0%, meaning they need $10,300 to purchase the same goods that cost $10,000 a year prior.

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RELATED TERMS

Learn More Key Concepts

Purchasing PowerThe financial capacity of a unit of currency to buy goods and services, which systematically declines as price inflation rises.

Cost of LivingThe average cost of maintaining a basic standard of living, covering essentials like housing, food, taxes, and healthcare.

Opportunity CostThe potential benefit or return sacrificed when choosing one investment or financial action over alternative options.

YieldThe income return on an investment, expressed as an annual percentage based on the asset's cost or market value.

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