Chapter 27/The Basic Tools of Finance ❖ 440
7. Economists who are skeptical of the e+cient markets hypothesis believe that
,uctuations in stock prices are partly psychological. People may in fact be willing
Problems and Applications
1. The future value of $24 invested for 400 years at an interest rate of 7% is
2. a. The present value of $15 million to be received in four years at an interest
b. The exact cutoE for the interest rate between pro6tability and nonpro6tability
is the interest rate that will equate the present value of receiving $15 million
in four years with the current cost of the project ($10 million):
3. a. Using the rule of 70, when the interest rate is 3.5 percent, the value of the
bond will double in approximately (70/3.5 =) 20 years. Therefore the value
b. Using the rule of 70, when the interest rate is 7 percent the value of the bond
will double in approximately (70/7 = ) 10 years. Therefore, the value today of
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