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Saving investment in Macro Economics
1.
Copyright © 2004
South-Western 2626Saving, Investment, and the Financial System
2.
Copyright © 2004
South-Western The Financial System • The financial systemfinancial system consists of the group of institutions in the economy that help to match one person’s saving with another person’s investment. • It moves the economy’s scarce resources from savers to borrowers.
3.
Copyright © 2004
South-Western FINANCIAL INSTITUTIONS IN THE U.S. ECONOMY • The financial system is made up of financial institutions that coordinate the actions of savers and borrowers. • Financial institutions can be grouped into two different categories: financial markets and financial intermediaries.
4.
Copyright © 2004
South-Western FINANCIAL INSTITUTIONS IN THE U.S. ECONOMY • Financial Markets • Stock Market • Bond Market • Financial Intermediaries • Banks • Mutual Funds
5.
Copyright © 2004
South-Western FINANCIAL INSTITUTIONS IN THE U.S. ECONOMY • Financial markets are the institutions through which savers can directly provide funds to borrowers. • Financial intermediaries are financial institutions through which savers can indirectly provide funds to borrowers.
6.
Copyright © 2004
South-Western Financial Markets • The Bond Market • A bond is a certificate of indebtedness that specifies obligations of the borrower to the holder of the bond. • Characteristics of a Bond • Term: The length of time until the bond matures. • Credit Risk: The probability that the borrower will fail to pay some of the interest or principal. • Tax Treatment: The way in which the tax laws treat the interest on the bond. • Municipal bonds are federal tax exempt. IOU
7.
Copyright © 2004
South-Western Financial Markets • The Stock Market • Stock represents a claim to partial ownership in a firm and is therefore, a claim to the profits that the firm makes. • The sale of stock to raise money is called equity financing. • Compared to bonds, stocks offer both higher risk and potentially higher returns. • The most important stock exchanges in the United States are the New York Stock Exchange, the American Stock Exchange, and NASDAQ.
8.
Copyright © 2004
South-Western Financial Markets • The Stock Market • Most newspaper stock tables provide the following information: • Price (of a share) • Volume (number of shares sold) • Dividend (profits paid to stockholders) • Price-earnings ratio
9.
Copyright © 2004
South-Western Financial Intermediaries • Financial intermediaries are financial institutions through which savers can indirectly provide funds to borrowers.
10.
Copyright © 2004
South-Western Financial Intermediaries • Banks • take deposits from people who want to save and use the deposits to make loans to people who want to borrow. • pay depositors interest on their deposits and charge borrowers slightly higher interest on their loans.
11.
Copyright © 2004
South-Western Financial Intermediaries • Banks • Banks help create a medium of exchange by allowing people to write checks against their deposits. • A medium of exchanges is an item that people can easily use to engage in transactions. • This facilitates the purchases of goods and services.
12.
Copyright © 2004
South-Western Financial Intermediaries • Mutual Funds • A mutual fund is an institution that sells shares to the public and uses the proceeds to buy a portfolio, of various types of stocks, bonds, or both. • They allow people with small amounts of money to easily diversify.
13.
Copyright © 2004
South-Western Financial Intermediaries • Other Financial Institutions • Credit unions • Pension funds • Insurance companies • Loan sharks
14.
Copyright © 2004
South-Western SAVING AND INVESTMENT IN THE NATIONAL INCOME ACCOUNTS • Recall that GDP is both total income in an economy and total expenditure on the economy’s output of goods and services: Y = C + I + G + NXY = C + I + G + NX
15.
Copyright © 2004
South-Western Some Important Identities • Assume a closed economyclosed economy – one that does not engage in international trade: Y = C + I + GY = C + I + G
16.
Copyright © 2004
South-Western Some Important Identities • Now, subtract C and G from both sides of the equation: Y – C – G =IY – C – G =I • The left side of the equation is the total income in the economy after paying for consumption and government purchases and is called national saving, or just saving (S).
17.
Copyright © 2004
South-Western Some Important Identities • Substituting S for Y - C - G, the equation can be written as: S = IS = I
18.
Copyright © 2004
South-Western Some Important Identities • National saving, or saving, is equal to: S = IS = I S = Y – C – GS = Y – C – G S = (Y – T – C) + (T – G)S = (Y – T – C) + (T – G)
19.
Copyright © 2004
South-Western The Meaning of Saving and Investment • National Saving • National saving is the total income in the economy that remains after paying for consumption and government purchases. • Private Saving • Private saving is the amount of income that households have left after paying their taxes and paying for their consumption. Private saving = (Y – T – C)Private saving = (Y – T – C)
20.
Copyright © 2004
South-Western The Meaning of Saving and Investment • Public Saving • Public saving is the amount of tax revenue that the government has left after paying for its spending. Public saving = (T – G)Public saving = (T – G)
21.
Copyright © 2004
South-Western The Meaning of Saving and Investment • Surplus and Deficit • If T > G, the government runs a budget surplus because it receives more money than it spends. • The surplus of T - G represents public saving. • If G > T, the government runs a budget deficit because it spends more money than it receives in tax revenue.
22.
Copyright © 2004
South-Western The Meaning of Saving and Investment • For the economy as a whole, saving must be equal to investment. S = IS = I
23.
Copyright © 2004
South-Western THE MARKET FOR LOANABLE FUNDS • Financial markets coordinate the economy’s saving and investment in the market formarket for loanable funds.loanable funds.
24.
Copyright © 2004
South-Western THE MARKET FOR LOANABLE FUNDS • The market for loanable funds is the market in which those who want to save supply funds and those who want to borrow to invest demand funds.
25.
Copyright © 2004
South-Western THE MARKET FOR LOANABLE FUNDS • Loanable fundsLoanable funds refers to all income that people have chosen to save and lend out, rather than use for their own consumption.
26.
Copyright © 2004
South-Western Supply and Demand for Loanable Funds • The supply of loanable funds comes from people who have extra income they want to save and lend out. • The demand for loanable funds comes from households and firms that wish to borrow to make investments.
27.
Copyright © 2004
South-Western Supply and Demand for Loanable Funds • The interest rate is the price of the loan. • It represents the amount that borrowers pay for loans and the amount that lenders receive on their saving. • The interest rate in the market for loanable funds is the real interest rate.
28.
Copyright © 2004
South-Western Supply and Demand for Loanable Funds • Financial markets work much like other markets in the economy. • The equilibrium of the supply and demand for loanable funds determines the real interest rate.
29.
Figure 1 The
Market for Loanable Funds Loanable Funds (in billions of dollars) 0 Interest Rate Supply Demand 5% $1,200 Copyright©2004 South-Western
30.
Copyright © 2004
South-Western Supply and Demand for Loanable Funds • Government Policies That Affect Saving and Investment • Taxes and saving • Taxes and investment • Government budget deficits
31.
Copyright © 2004
South-Western Policy 1: Saving Incentives • Taxes on interest income substantially reduce the future payoff from current saving and, as a result, reduce the incentive to save.
32.
Copyright © 2004
South-Western Policy 1: Saving Incentives • A tax decrease increases the incentive for households to save at any given interest rate. • The supply of loanable funds curve shifts to the right. • The equilibrium interest rate decreases. • The quantity demanded for loanable funds increases.
33.
Figure 2 An
Increase in the Supply of Loanable Funds Loanable Funds (in billions of dollars) 0 Interest Rate Supply,S1 S2 2.. . . which reduces the equilibrium interest rate . . . 3.. . . and raises the equilibrium quantity of loanable funds. Demand 1. Tax incentives for saving increase the supply of loanable funds . . . 5% $1,200 4% $1,600 Copyright©2004 South-Western
34.
Copyright © 2004
South-Western Policy 1: Saving Incentives • If a change in tax law encourages greater saving, the result will be lower interest rates and greater investment.
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South-Western Policy 2: Investment Incentives • An investment tax credit increases the incentive to borrow. • Increases the demand for loanable funds. • Shifts the demand curve to the right. • Results in a higher interest rate and a greater quantity saved.
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South-Western Policy 2: Investment Incentives • If a change in tax laws encourages greater investment, the result will be higher interest rates and greater saving.
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Figure 3 An
Increase in the Demand for Loanable Funds Loanable Funds (in billions of dollars) 0 Interest Rate 1. An investment tax credit increases the demand for loanable funds . . . 2. . . . which raises the equilibrium interest rate . . . 3. . . . and raises the equilibrium quantity of loanable funds. Supply Demand,D1 D2 5% $1,200 6% $1,400 Copyright©2004 South-Western
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South-Western Policy 3: Government Budget Deficits and Surpluses • When the government spends more than it receives in tax revenues, the short fall is called the budget deficit. • The accumulation of past budget deficits is called the government debt.
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South-Western Policy 3: Government Budget Deficits and Surpluses • Government borrowing to finance its budget deficit reduces the supply of loanable funds available to finance investment by households and firms. • This fall in investment is referred to as crowding out. • The deficit borrowing crowds out private borrowers who are trying to finance investments.
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South-Western Policy 3: Government Budget Deficits and Surpluses • A budget deficit decreases the supply of loanable funds. • Shifts the supply curve to the left. • Increases the equilibrium interest rate. • Reduces the equilibrium quantity of loanable funds.
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Figure 4: The
Effect of a Government Budget Deficit Loanable Funds (in billions of dollars) 0 Interest Rate 3. . . . and reduces the equilibrium quantity of loanable funds. S2 2.. . . which raises the equilibrium interest rate . . . Supply,S1 Demand $1,200 5% $800 6% 1. A budget deficit decreases the supply of loanable funds . . . Copyright©2004 South-Western
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South-Western Policy 3: Government Budget Deficits and Surpluses • When government reduces national saving by running a deficit, the interest rate rises and investment falls.
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South-Western Policy 3: Government Budget Deficits and Surpluses • A budget surplus increases the supply of loanable funds, reduces the interest rate, and stimulates investment.
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Figure 5 The
U.S. Government Debt Percent of GDP 1790 1810 1830 1850 1870 1890 1910 1930 1950 1970 1990 Revolutionary War 2010 Civil War World War I World War II 0 20 40 60 80 100 120 Copyright©2004 South-Western
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South-Western Summary • The U.S. financial system is made up of financial institutions such as the bond market, the stock market, banks, and mutual funds. • All these institutions act to direct the resources of households who want to save some of their income into the hands of households and firms who want to borrow.
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South-Western Summary • National income accounting identities reveal some important relationships among macroeconomic variables. • In particular, in a closed economy, national saving must equal investment. • Financial institutions attempt to match one person’s saving with another person’s investment.
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South-Western Summary • The interest rate is determined by the supply and demand for loanable funds. • The supply of loanable funds comes from households who want to save some of their income. • The demand for loanable funds comes from households and firms who want to borrow for investment.
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South-Western Summary • National saving equals private saving plus public saving. • A government budget deficit represents negative public saving and, therefore, reduces national saving and the supply of loanable funds. • When a government budget deficit crowds out investment, it reduces the growth of productivity and GDP.
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