week 14 Flashcards
what are interest rates per period
most straightforward
not on an annual basis
what are stated annual interest rate / quoted rate
periodic compounding
most available rate
known as APR - the interest charged per period times the number of periods per year
what is effective interest rate
most informative rate
what is the frequency of compounding
investments pay more interest more than once a year,
semi-annual interest rate that compounds twice a year
how can future value be expressed
PV (1 + (rs/m)) ^ mN
m is the number of compounding periods
N is number of years
what is effective annual rate (EAR)
the actual rate paid after accounting for compounding that occurs during the year
used to compare two alternative investments with different compounding periods
how do you calculate EAR
(1 + (APR / m))^m - 1
how do you calculate APR from EAR
APR = m x ((1 + EAR) ^1/m -1)
what are loan types
there are unlimited possibilities of how loan principal and interest is paid
pure discount loans
interest-only loans/bullet bonds
amortised loans (fully or partially)
what are pure discount loans
the borrower receives money today and repays a single lump sum at end of the loan
what are interest only loans
interest only loans require payment of interest each period and the repayment of the principal at a later date
what are amortised loans
principal is repaid overtime
the amount of principal is decreasing overtime
as part of the principal gets repaid, interest is calculated only on the remainder of the principal
periodic payments = interest + repayment of a portion of the principal
what are the two types of amortised loans
fixed principal
fixed payments
what is an amortisation schedule
a table that describes the periodic payments as well as the interest and principal balance after each payment
what is fixed principal
the principle balance is reduced by the same amount each period
the periodic payment is different each year