ECON 2560 Chapter Notes - Chapter 5: Discounting, Cash Flow, Real Interest Rate

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14 Feb 2018
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Simple interest: interest earned only on the original investment. Suppose banks are currently paying an interest rate of 6% per year on deposits. So after a year, your account will earn interest : The value your investment will grow to by the end of the year. Value of investment after 1 year = + = . Notice that the invested grows by the factor (1 + 0. 6) = 1. 06. In general, for any interest rate, r, the value of the investment at the end of 1 year is (1 + r) times the initial investment: Value after year 1 = initial investment x ( 1 + r ) Value after year 2 = initial investment x ( 1 + r )t. Future value: amount to which an investment will grow after earning interest. Future value = initial investment x ( 1 + r )t.

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