Chapter 26: Saving, Investment and the Financial System

The video introduces the concept of the financial system as institutions that coordinate saving with borrowing. It explains that savers are the source of funds for borrowers, and financial institutions act as intermediaries connecting these two parties.

Financial markets, such as the bond market, allow direct interaction between savers and borrowers. A bond is defined as a certificate of indebtedness, or an IOU, specifying a maturity date, interest rate, and the obligations of the borrower. Characteristics like term (loan length), credit risk (probability of default), and tax treatment affect a bond's interest rate. Longer terms and higher credit risks generally lead to higher interest rates, with municipal bonds offering tax-free interest.

Stocks represent ownership in a corporation and a claim to its profits, differing from bonds which represent debt. Selling stocks is known as equity finance, while selling bonds is debt finance. Stock prices are determined by the supply and demand for shares, with expectations about a company's future profitability being a key driver of demand shifts and price changes.

Financial intermediaries are institutions that stand between savers and borrowers. Banks are a prime example, taking deposits and making loans at a higher interest rate. Banks also create financial assets like checking accounts. Mutual funds are another type of intermediary that pool deposits to buy diversified portfolios of stocks and bonds.

The national income identity (Y = C + I + G for a closed economy) is used to show that national saving equals investment. National saving is further broken down into private saving (income minus taxes and consumption) and public saving (taxes minus government spending). A budget surplus occurs when taxes exceed government spending, while a budget deficit occurs when government spending exceeds taxes.

The model of supply and demand for loanable funds explains how saving and investment are brought into equality. The supply of loanable funds comes from savers, and the demand comes from households and firms seeking to invest. The interest rate acts as the price of a loan, balancing the quantity of funds saved and invested. Market incentives ensure the interest rate moves towards equilibrium.

Government policies can influence saving behavior. An increase in the capital gains tax, for instance, reduces the reward for saving, causing the supply of loanable funds to shift left. This results in a higher equilibrium interest rate and a lower amount of saving and investment in the economy, potentially impacting future economic growth negatively.

Investment incentives, such as an investment tax credit, encourage borrowing for investment by reducing the cost of borrowing. An investment tax credit shifts the demand for loanable funds to the right, leading to a higher equilibrium interest rate and an increased amount of saving and investment, which can promote long-term economic growth.

Government budget deficits, where government spending exceeds tax collections, decrease national saving. This reduction in the supply of loanable funds leads to an increase in the interest rate and a decrease in private investment, a phenomenon known as "crowding out." Budget deficits can have a detrimental effect on long-run economic growth.