How to calculate annual percentage return on investment

Written by scott franks
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An investor wants to know a stock's annual rate of return to help him gauge how well the security is performing. The annual percentage return on investment is the most basic of measures for securities in a portfolio. An investor can use the calculation to quickly compare the performance of varied investments and give her a starting point to evaluate possible portfolio adjustments.

Skill level:
Easy

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Things you need

  • Calculator

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Instructions

  1. 1

    Calculate what your investment was worth at the beginning of the first day of the year. If you owned 1,000 shares of Company A stock on Jan. 1, 2009, that closed at £6 on Dec. 31, 2008, the investment started the year valued at £6,500.

  2. 2

    Calculate the capital gain of your investment on the end of the last day of the year. If the stock closed at £7 on Dec. 31, 2009, your 1,000 shares are worth £7,800, for a capital gain of £7,800-$10,000, or £1,300.

  3. 3

    Add the value of any dividends you received on the investment at any point during the year. If your stock paid an annual dividend in October of 10 cents per share, you received £65 in dividends.

  4. 4

    Add the amount of dividends you received to the capital gain to determine total return. In the example, the total return is £1,365.

  5. 5

    Divide the total return by the initial value and multiply by 100 to calculate your annual percentage return. In the example, your return for the year is ($2,100/$10,000)*100, or 21 per cent.

Tips and warnings

  • Do not add new investment you made during the year to your calculation. You can use that to determine annualised rate of return, but not annual percentage return.

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