What is the 'InflationAdjusted Return'
The inflationadjusted return is the measure of return that takes into account the time period's inflation rate. Inflationadjusted return reveals the return on an investment after removing the effects of inflation. Removing the effects of inflation from the return of an investment allows the investor to see the true earning potential of the security without external economic forces.
BREAKING DOWN 'InflationAdjusted Return'
This real rate of return may be used to compare investments, especially those across international borders, as each country's inflation rate is accounted for in the return. Without adjusting for inflation, an investor may get an entirely different picture from reality when analyzing an investment's performance.
For example, assume a bond investment is reported to have earned 2 percent in the previous year. This looks like a gain, but perhaps inflation last year was 2.5 percent. Essentially, this means the investment did not keep up with inflation and effectively lost 0.5 percent.
As another example, assume a stock returned 12 percent last year and inflation was 3 percent. An approximate estimate of the real rate of return is 9 percent, or the 12 percent reported return less the inflation amount.
Calculating the InflationAdjusted Return
Calculating the inflationadjusted return requires three basic steps. First, the return on the investment must be calculated. Second, the inflation for the period must be calculated. And third, the inflation amount must be geometrically backed out of the investment's return. As an example:
Assume an investor purchases a stock on Jan. 1 of a given year for $75,000. At the end of the year, on Dec. 31, the investor sells the stock for $90,000. During the course of the year, the investor received $2,500 in dividends. At the beginning of the year, the Consumer Price Index (CPI) was at 700. On Dec. 31, the CPI was at a level of 721.
Step 1 is to calculate the investment's return using the following formula:
 Return = (Ending price  Beginning price + Dividends) / (Beginning price) = ($90,000  $75,000 + $2,500) / $75,000 = 23.3% percent.
Step 2 is to calculate the level of inflation over the period using the following formula:
 Inflation = (Ending CPI level  Beginning CPI level) / Beginning CPI level = (721  700) / 700 = 3 percent
Step 3 is to geometrically back out the inflation amount using the following formula:
 Inflationadjusted return = (1 + Stock Return) / (1 + Inflation)  1 = (1.233 / 1.03)  1 = 19.7 percent
Since inflation and returns compound, it is necessary to use the formula in step three. If an investor simply takes a linear estimate by subtracting 3 percent from 23.3 percent, he arrives at an inflationadjusted return of 20.3 percent, which in this example is 0.6 percent too high.
Using Nominal vs. InflationAdjusted Returns as a Tool
Using inflationadjusted returns is often a good idea because they put things into a very realworld perspective. Focusing on how investments are doing over the longer term can often present a better picture when it comes to its past performance rather than a daytoday, weekly or even monthly glance. But there may be a good reason why nominal returns work over those adjusted for inflation. Nominal returns are generated before any taxes, investment fees or inflation. Since we live in a “here and now” world, these nominal prices and returns are what we deal with immediately to move forward. So most people will want to get an idea of how the high and low price of an investment is relative to its future prospects rather than its past performance. In short, how the price fared when adjusted for inflation five years ago won’t necessarily matter when an investor buys it tomorrow.

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