Illustrated example
Nominal dollars versus buying power
If prices rise, the same dollar amount may buy less in the future.
Illustrative example only, not historical market data.Start here
Key takeaways
- Inflation reduces purchasing power.
- Nominal return is the return before adjusting for inflation.
- Real return is the return after considering inflation.
- Long-term calculators should not confuse more dollars with more buying power.
Plain-English idea
Inflation means prices are generally rising. If groceries, rent, energy, and services cost more over time, each dollar buys less than before.
For investors, this matters because the account balance is not the whole story. A future $20,000 balance may sound larger than $10,000 today, but its real value depends on what $20,000 can buy then.
Nominal versus real
Nominal return is the return shown in dollars before inflation. Real return adjusts for inflation. If an investment earns 6% and inflation is 3%, the rough real return is about 3%. This is approximate because compounding makes the exact calculation slightly different.
This is why cash can feel safe but still lose buying power. The balance may stay steady while prices rise around it.
Why it matters in what-if results
WhatIf Calc shows historical estimates in money terms. A user should remember that older dollars and today's dollars do not have the same purchasing power.
For a deeper comparison, users can ask: did the investment grow faster than inflation, and by enough to compensate for risk, taxes, and fees?
Going deeper
Intermediate users may separate expected inflation from unexpected inflation. Markets often price in some expectation, but surprises can affect interest rates, bond prices, company margins, and consumer behavior. Official inflation measures are averages; a person's own cost basket can feel different if their biggest expenses rise faster or slower.
Inflation can affect assets differently. Fixed payments can be hurt when prices rise, while some businesses or assets may pass through higher prices better than others.
References