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Saving, Investment, and

the Financial System

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PowerPoint Slides prepared by:

Andreea CHIRITESCU

Eastern Illinois University

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Financial Institutions

  • Financial system
    • Group of institutions in the economy
      • That help match one person’s saving with another person’s investment
    • Moves the economy’s scarce resources from savers to borrowers
  • Financial institutions
    • Financial markets
    • Financial intermediaries

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Financial Markets

  • Financial markets
    • Savers can directly provide funds to borrowers
    • The bond market
    • The stock market

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Financial Markets

  • The bond market
    • Bond - certificate of indebtedness
      • Time of maturity - the loan will be repaid
      • Rate of interest
      • Principal - amount borrowed
    • Term - length of time until maturity
    • Credit risk – probability of default
    • Tax treatment

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Financial Markets

  • The stock market
    • Stock - claim to partial ownership in a firm
    • Organized stock exchanges
      • Stock prices: demand and supply
    • Equity finance
      • Sale of stock to raise money
    • Stock index
      • Average of a group of stock prices

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Financial Intermediaries

  • Financial intermediaries
    • Savers can indirectly provide funds to borrowers
    • Banks
    • Mutual funds

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Financial Intermediaries

  • Banks
    • Take in deposits from savers
      • Banks pay interest
    • Make loans to borrowers
      • Banks charge interest
    • Facilitate purchasing of goods and services
      • Checks – medium of exchange

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Financial Intermediaries

  • Mutual funds
    • Institution that sells shares to the public
    • Uses the proceeds to buy a portfolio of stocks and bonds
    • Advantages
      • Diversification
      • Access to professional money managers

​

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National Income Accounts

  • Rules of national income accounting
    • Important identities
  • Identity
    • An equation that must be true because of the way the variables in the equation are defined
    • Clarify how different variables are related to one another

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Accounting Identities

  • Gross domestic product (GDP)
    • Total income
    • Total expenditure
  • Y = C + I + G + NX
    • Y= gross domestic product GDP
    • C = consumption
    • G = government purchases
    • NX = net exports

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Accounting Identities

  • Closed economy
    • Doesn’t interact with other economies
    • NX = 0
  • Open economy
    • Interact with other economies
    • NX ≠ 0

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Accounting Identities

  • Assumption: close economy: NX = 0
    • Y = C + I + G
  • National saving (saving), S
    • Total income in the economy that remains after paying for consumption and government purchases
    • Y – C – G = I
    • S = Y – C - G
    • S = I

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Accounting Identities

  • T = taxes minus transfer payments
    • S = Y – C – G
    • S = (Y – T – C) + (T – G)
  • Private saving, Y – T – C
    • Income that households have left after paying for taxes and consumption
  • Public saving, T – G
    • Tax revenue that the government has left after paying for its spending

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Accounting Identities

  • Budget surplus: T – G > 0
    • Excess of tax revenue over government spending
  • Budget deficit: T – G < 0
    • Shortfall of tax revenue from government spending

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Saving and Investing

  • Accounting identity: S = I
  • Saving = Investment
    • For the economy as a whole
    • One person’s savings can finance another person’s investment

​

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The Market for Loanable Funds

  • Market for loanable funds
    • Market
      • Those who want to save supply funds
      • Those who want to borrow to invest demand funds
    • One interest rate
      • Return to saving
      • Cost of borrowing
    • Assumption
      • Single financial market

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The Market for Loanable Funds

  • Supply and demand of loanable funds
    • Source of the supply of loanable funds
      • Saving
    • Source of the demand for loanable funds
      • Investment
    • Price of a loan = real interest rate
      • Borrowers pay for a loan
      • Lenders receive on their saving

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The Market for Loanable Funds

  • Supply and demand of loanable funds
    • As interest rate rises
      • Quantity demanded declines
      • Quantity supplied increases
    • Demand curve
      • Slopes downward
    • Supply curve
      • Slopes upward

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Figure 1

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The Market for Loanable Funds

Interest

Rate

Loanable Funds

(in billions of dollars)

0

Supply

Demand

5%

$1,200

The interest rate in the economy adjusts to balance the supply and demand for loanable funds. The supply of loanable funds comes from national saving, including both private saving and public saving. The demand for loanable funds comes from firms and households that want to borrow for purposes of investment. Here the equilibrium interest rate is 5 percent, and $1,200 billion of loanable funds are supplied and demanded.

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The Market for Loanable Funds

  • Government policies
    • Can affect the economy’s saving and investment
      • Saving incentives
      • Investment incentives
      • Government budget deficits and surpluses

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Policy 1: Saving Incentives

  • Shelter some saving from taxation
    • Affect supply of loanable funds
    • Increase in supply
      • Supply curve shifts right
    • New equilibrium
      • Lower interest rate
      • Higher quantity of loanable funds
        • Greater investment

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Figure 2

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Saving Incentives Increase the Supply of Loanable Funds

Interest

Rate

Loanable Funds

(in billions of dollars)

0

Supply, S1

Demand

5%

$1,200

A change in the tax laws to encourage Americans to save more would shift the supply of loanable funds to the right from S1 to S2. As a result, the equilibrium interest rate would fall, and the lower interest rate would stimulate investment. Here the equilibrium interest rate falls from 5 percent to 4 percent, and the equilibrium quantity of loanable funds saved and invested rises from $1,200 billion to $1,600 billion.

S2

4%

$1,600

1. Tax incentives for saving increase the supply of loanable funds . . .

3. . . . and raises the equilibrium quantity of loanable funds.

2. . . . which reduces the equilibrium interest rate . . .

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Policy 2: Investment Incentives

  • Investment tax credit
    • Affect demand for loanable funds
    • Increase in demand
      • Demand curve shifts right
    • New equilibrium
      • Higher interest rate
      • Higher quantity of loanable funds
        • Greater saving

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Figure 3

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Investment Incentives Increase the Demand for Loanable Funds

Interest

Rate

Loanable Funds

(in billions of dollars)

0

Supply

Demand, D1

5%

$1,200

If the passage of an investment tax credit encouraged firms to invest more, the demand for loanable funds would increase. As a result, the equilibrium interest rate would rise, and the higher interest rate would stimulate saving. Here, when the demand curve shifts from D1 to D2, the equilibrium interest rate rises from 5 percent to 6 percent, and the equilibrium quantity of loanable funds saved and invested rises from $1,200 billion to $1,400 billion.

D2

6%

$1,400

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.

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Policy 3: Budget Deficit/Surplus

  • Government - starts with balanced budget
    • Then starts running a budget deficit
      • Change in supply of loanable funds
      • Decrease in supply
        • Supply curve shifts left
      • New equilibrium
        • Higher interest rate
        • Smaller quantity of loanable funds

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Figure 4

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The Effect of a Government Budget Deficit

Interest

Rate

Loanable Funds

(in billions of dollars)

0

Supply, S1

Demand

5%

$1,200

When the government spends more than it receives in tax revenue, the resulting budget deficit lowers national saving. The supply of loanable funds decreases, and the equilibrium interest rate rises. Thus, when the government borrows to finance its budget deficit, it crowds out households and firms that otherwise would borrow to finance investment. Here, when the supply shifts from S1 to S2, the equilibrium interest rate rises from 5 to 6 percent, and the equilibrium quantity of loanable funds saved and invested falls from $1,200 billion to $800 billion.

S2

6%

$800

1. A budget deficit decreases the supply of loanable funds . . .

3. . . . and reduces the equilibrium quantity of loanable funds.

2. . . . which

raises the

equilibrium

interest rate . . .

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Policy 3: Budget Deficit/Surplus

  • Crowding out
    • Decrease in investment
    • Results from government borrowing
  • Government - budget deficit
    • Interest rate rises
    • Investment falls

​

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Policy 3: Budget Deficit/Surplus

  • Government – budget surplus
    • Increase supply of loanable funds
    • Reduce interest rate
    • Stimulates investment

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Figure 5

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The U.S. Government Debt

The debt of the U.S. federal government, expressed here as a percentage of GDP, has varied throughout history. Wartime spending is typically associated with substantial increases in government debt.