FIN 3110 Lecture Notes - Lecture 2: Loanable Funds, Aggregate Demand, Aggregate Supply

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Chapter 2 Determination of Interest Rates
Loanable funds theory: suggests that the market interest rate is determined by factors
controlling the supply of and demand for (money) loanable funds
DEMAND:
o Can be used to explain:
Movements in the general level of interest rates in a particular country
Why interest rates among debt securities of a given country vary
o Household demand for loanable funds
To finance housing expenditures as well as the purchase of automobiles
and household items
Inverse relationship between the interest rate and the quantity of loanable
funds demanded
As interest rates increase, money demanded for households
decreases
o Business demand for loanable funds
Shifts in demand for loanable funds
Depends on the number of business projects to be implemented.
More demand at lower interest rates
o Lower interest rates, borrow more, net present value
increase
o Government demand for loanable funds
Governments demand loanable funds when planned expenditures are not
covered by incoming revenues
Government demand is said to be interest inelastic: insensitive to
interest rates. Expenditures and tax policies are independent of the level
of interest rates.
For any interest rate, demand is constant
US debt debt without tears
o Foreign demand:
A country’s demand for foreign funds depends on the interest rate
differential between the two
The greater the differential, the greater the demand for foreign
funds
The quantity of U.S. loanable funds demanded by foreign
governments will be inversely related to U.S. interest rates
o Aggregate demand:
The sum of the quantities demanded by the separate sectors at any given
interest rate.
Interest increases, aggregate demand decreases
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