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(Continuous compounding, 11) Suppose you have $1 million and you can invest it in a bank account that pays interests at an annual percentage rate
(Continuous compounding, 11) Suppose you have $1 million and you can invest
it in a bank account that pays interests at an annual percentage rate (APR) of 3%. You want
to invest your $1m for 5 years.
(a). Suppose you are allowed to reinvest the interest at the end of every year (i.e., annual
compounding). What is the balance of your account at the end of year 5? (2)
(b). Suppose you are allowed to reinvest the interest at the end of every month (i.e., monthly
compounding). What is the balance of your account at the end of year 5? (2)
(c). Suppose you are allowed to reinvest the interest at the end of every day (i.e., daily
compounding). What is the balance of your account at the end of year 5? (Assume there are
365 days in a year.) (2)
(d). Suppose you are allowed to reinvest the interest at the end of every hour (i.e., hourly
compounding). What is the balance of your account at the end of year 5? (Assume there are
365 days in a year and 24 hours in a day.) (2)
(e). The formula of continuous compounding is
lim (1 +
)
=
,
where denotes the compounding frequency and is the number of years. Use the
formula of continuous compounding to calculate the balance of your account at the end of
year 5. Compare the answers in (a)-(e). What do you conclude? (3)
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