A Rate of Return (ROR) is the gain or loss of an investment over a certain period of time. In other words, the rate of return is the gain (or loss) compared to the cost of an initial investment, typically expressed in the form of a percentage. When the ROR is positive, it is considered a gain, and when the ROR is negative, it reflects a loss on the investment.
Video Explanation of Rate of Return
Watch this short video to quickly understand the main concepts covered in this guide, including the definition of rate of return, the formula for calculating ROR and annualized ROR, and example calculations.
Formula for Rate of Return
The standard formula for calculating ROR is as follows:
Keep in mind that any gains made during the holding period of the investment should be included in the formula. For example, if a share costs $10 and its current price is $15 with a dividend of $1 paid during the period, the dividend should be included in the ROR formula. It would be calculated as follows:
(($15 + $1 – $10) / $10) x 100 = 60%
Example Rate of Return Calculation
Adam is a retail investor and decides to purchase 10 shares of Company A at a per-unit price of $20. Adam holds onto shares of Company A for two years. In that time frame, Company A paid yearly dividends of $1 per share. After holding them for two years, Adam decides to sell all 10 shares of Company A at an ex-dividend price of $25. Adam would like to determine the rate of return during the two years he owned the shares.
To determine the rate of return, first, calculate the amount of dividends he received over the two-year period:
10 shares x ($1 annual dividend x 2) = $20 in dividends from 10 shares
Next, calculate how much he sold the shares for:
10 shares x $25 = $250 (Gain from selling 10 shares)
Lastly, determine how much it cost Adam to purchase 10 shares of Company A:
10 shares x $20 = $200 (Cost of purchasing 10 shares)
Plug all the numbers into the rate of return formula:
= (($250 + $20 – $200) / $200) x 100 = 35%
Therefore, Adam realized a 35% return on his shares over the two-year period.
Annualized Rate of Return
Note that the regular rate of return describes the gain or loss, expressed in a percentage, of an investment over an arbitrary time period. The annualized ROR, also known as the Compound Annual Growth Rate (CAGR), is the return of an investment over each year.
Formula for Annualized ROR
The formula for annualized ROR is as follows:
Similar to the simple rate of return, any gains made during the holding period of this investment should be included in the formula.
Example of Annualized Rate of Return
Let us revisit the example above and determine the annualized ROR. Recall that Adam purchased 10 shares at a per-unit price of $20, received $1 in dividends per share each year, and sold the shares at a price of $25 after two years. The annualized ROR would be as follows:
(($250 + $20) / $200 )1/2 – 1 = 16.1895%
Therefore, Adam made an annualized return of 16.1895% on his investment.
Alternative Measures of Return
Return can mean different things to different people, and it’s important to know the context of the situation to understand what they mean. In addition to the above methods for measuring returns, there are several other types of formulas.