In-Depth Notes on Saving, Investment, and Financial Systems

Introduction to Saving, Investment, and Financial System

  • Understanding the interrelationships between saving, investment, and the financial system is crucial for grasping economic principles.

What Will We Learn?

  • Main Financial Institutions: Types and functions of financial institutions in the economy.
  • Types of Saving: Three kinds of saving to understand.
  • Saving vs. Investment: Distinction between the two concepts.
  • Financial System Role: How it coordinates saving and investment.
  • Government Policies Impact: Effects on saving, investment, and interest rates.

Financial Institutions

  • Definition: Group of institutions that help match savers with investors.
  • Types of Financial Institutions:
  • Financial Markets: Direct transactions between savers and borrowers.
  • Financial Intermediaries: Indirectly facilitate funding by pooling funds, e.g. banks and mutual funds.

Financial Capital Markets

  • Source of Investment Funds: Saving is key.
  • Types of Financial Markets:
  • Loan Markets: Provide loans between borrowers and lenders.
  • Bond Markets: Bonds signify indebtedness; investors earn interest.
  • Stock Markets: Stocks represent ownership in a firm.
  • Financial Intermediaries Examples: Banks, mutual funds, etc.

Important Identities in Economics

  • GDP Identity:
    • Equation: Y = C + I + G + NX
    • Where:
    • Y = GDP
    • C = Consumption
    • I = Investment
    • G = Government spending
    • NX = Net Exports
  • Closed Economy Assumption: NX = 0 leads to Y = C + I + G. Here, investment (I) can be trimmed as I = Y - C - G.
  • Saving Definitions:
  • Private Saving: Income not spent on consumption or taxes.
  • Public Saving: Tax revenue minus government expenditures.

National Saving

  • Definition of National Saving:
  • National Saving = Private Saving + Public Saving = Y - C - G
  • Investment in Closed Economies: Saving equals investment: S = I = Y - C - G

Budget Surplus and Deficit

  • Definitions:
  • Budget Surplus: Excess of tax revenue over government spending (T - G).
  • Budget Deficit: Shortfall of tax revenue from spending (G - T).

Market for Loanable Funds

  • Definition: Aggregate of all financial markets, reflecting how savings and borrowing are matched.
  • Sources of Funds:
  1. Household Saving (S)
  2. Government Budget Surplus (T - G)
  3. Borrowing from the rest of the world (M - X)
  • Interest Rate: Understanding nominal (actual dollars paid) vs. real (adjusted for inflation) interest rates.

Supply of Loanable Funds

  • Relationship with Interest Rates: Supply linked to the real interest rate; influences include disposable income, expected future income, wealth, and default risk.
  • Real Interest Rate Rise: Affects the quantity of loanable funds supplied.

Demand for Loanable Funds

  • Determining Factors: Quantity of loanable funds demanded is influenced by the real interest rate and expected profit.
  • Investment: Business demands for funds contribute to this market.

Equilibrium in the Loanable Funds Market

  • Balance Point: The real interest rate where quantity demanded equals the quantity supplied.
  • Adjustments: Interest rates adjust to equalize supply and demand for loanable funds thereby affecting investment and savings levels.

Changes in Demand and Supply

  • Volatility in Financial Markets: Driven by fluctuations in demand and supply leading to changes in real interest rates and equilibrium outcomes.
  • Government Action: Surplus increases supply while deficit raises demand, impacting real interest rates.

Exercises and Applications

  1. Practice calculating public, private, and national savings using given economic data.
  2. Exercise scenarios to analyze the financial implications of government actions on saving and investment.
  3. Case studies concerning pandemic budgeting and social assistance measures in Indonesia.

Conclusion

  • Understanding saving, investment, and the financial system is vital for navigating economic landscapes and formulating policies that promote healthy economic growth.