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The Silent Thief: How Inflation Erodes Investment Gains

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The following content is sponsored by Terzo

Key Takeaways

  • Inflation can drastically reduce the purchasing power of your money over time.
  • A $1,000 investment in large-cap U.S. stocks held from 1974-2024 would be worth $341K before inflation and just $56K after adjusting for inflation.

How the Inflation Rate Erodes Investment Gains

Imagine there’s a thief that sneaks into your financial accounts. At first glance you don’t notice, because your account balance is the same. But when you go to spend the money, it buys you less of the things it used to. Your money doesn’t hold the same value anymore.

This is how the inflation rate can work against you. This graphic, in partnership with Terzo, shows how inflation can erode your investment value over time.

Investment Values Before and After Inflation

In our example, we assume someone invested $1,000 in large cap U.S. stocks at the end of 1974 and held it until the end of 2024. 

The value before inflation is often referred to as the nominal value, and is the total dollar amount before any adjustments. The inflation-adjusted value shows how the inflation rate reduces the real return an investor would receive each year.

YearValue Before InflationInflation-Adjusted Value
1974$1,000$1,000
1975$1,372$1,283
1976$1,699$1,515
1977$1,577$1,318
1978$1,681$1,288
1979$1,990$1,347
1980$2,636$1,585
1981$2,506$1,384
1982$3,046$1,620
1983$3,734$1,913
1984$3,968$1,956
1985$5,227$2,482
1986$6,203$2,913
1987$6,528$2,936
1988$7,613$3,279
1989$10,025$4,126
1990$9,714$3,768
1991$12,674$4,770
1992$13,640$4,989
1993$15,015$5,345
1994$15,213$5,275
1995$20,930$7,077
1996$25,736$8,422
1997$34,321$11,044
1998$44,130$13,975
1999$53,415$16,474
2000$48,555$14,484
2001$42,781$12,567
2002$33,327$9,562
2003$42,885$12,078
2004$47,551$12,969
2005$49,885$13,156
2006$57,762$14,856
2007$60,934$15,057
2008$38,388$9,477
2009$48,546$11,668
2010$55,857$13,227
2011$57,035$13,117
2012$66,161$14,956
2013$87,590$19,507
2014$99,581$22,011
2015$100,956$22,153
2016$113,030$24,299
2017$137,704$28,992
2018$131,673$27,203
2019$173,137$34,968
2020$204,994$40,847
2021$263,848$49,116
2022$216,065$37,784
2023$272,868$46,171
2024$341,140$56,101

Values are at the end of the respective calendar year. Returns are total returns from the S&P 500, and U.S. inflation is calculated using CPI for all urban consumers. These calculations do not take any investment fees or taxes into account.

After 50 years, the $1,000 investment would be worth over $341,000 in unadjusted terms. However, once we take inflation into account, the investment is only worth $56,000 in real terms. This reflects the fact that the purchasing power of money can drop drastically over time as goods and services become more expensive.

You can also see how the gap between the two values widens over time. Inflation doesn’t just happen once; it keeps eating away at your money year after year. That’s compounding. Each year, the amount you lose to inflation gets added to the previous year’s loss, resulting in a bigger and bigger difference between your unadjusted returns and what your money can actually buy.

The Inflation Rate and Other Hidden Costs

Because inflation can have such a big impact on your spending power over time, it’s an important factor to consider when you’re selecting investments. For example, U.S. large cap stocks have historically generated returns that outpace inflation on average. On the other hand, certificates of deposit (CDs) and bonds are less likely to keep up with the inflation rate.

Inflation isn’t the only thief silently “stealing” your money. For example, many companies are losing money because of duplicate or redundant supplier spending. 

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