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The Money Supply Chapter 22 1

THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

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Page 1: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

The Money Supply

Chapter 22

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Page 2: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

WHAT IS MONEY?• Money is anything that is generally accepted as a medium of exchange

• A Means of Payment, or Medium of Exchange

• A Store of Value• A Unit of Account

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Page 3: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

A Means of Payment, or Medium of Exchange

barter The direct exchange of goods and services for other goods and services• A barter system requires a double coincidence of wants

for trade to take place

medium of exchange, or means of payment What sellers generally accept and buyers generally use to pay for goods and services

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Page 4: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEYA Store of Value

store of value An asset that can be used to transport purchasing power from one time period to another

liquidity property of money The property of money that makes it a good medium of exchange as well as a store of value: It is portable and readily accepted and thus easily exchanged for goods• The main disadvantage of money as a store value is that the

value of money falls when the prices of goods and services rise

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Page 5: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

A Unit of Account

unit of account A standard unit that provides a consistent way of quoting prices

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Page 6: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

COMMODITY AND FIAT MONIES

commodity monies Items used as money that also have intrinsic value in some other use• Example: gold

fiat, or token, money Items designated as money that are intrinsically worthless

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Page 7: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY• Why would anyone accept worthless scraps of paper as

money instead of something that has some values, such as gold?

• If your answer is “because the paper money is backed by gold or silver”, you are wrong

• There was a time when paper money in circulation were convertible directly into gold

• However, paper money is no longer backed by any commodity

• The public accepts paper money as a means of payment and a store of value because the government has taken steps to ensure that its money is accepted

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Page 8: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

legal tender Money that a government has required to be accepted in settlement of debts

•Aside from declaring its currency legal tender, the government usually does one another thing to ensure that paper money will be accepted:

• It promises the public that it will not print paper money so fast that it loses its value

currency debasement The decrease in the value of money that occurs when its supply is increased rapidly

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Page 9: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEYMEASURING THE SUPPLY OF MONEY

• Recall that money is used to buy things (a means of payment); to hold wealth (a store value); and to quote prices (a unit of account)

M1: Transactions Money

M1, or transactions money Money that can be directly used for transactions

M1 ≡ currency held outside banks + demand deposits + traveler’s checks + other checkable deposits

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Page 10: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

• Demand deposits or checking accounts• Depositors have the right to go to the bank and cash in (demand) their entire checking account balances at any time

• This is why checking accounts are included as part of the amount of money you hold

• Checkable deposits is any deposit account with a bank on which a check can be written

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Page 11: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

M2: Broad Money

near monies Close substitutes for transactions money, such as savings accounts and money market accounts

M2, or broad money M1 plus savings accounts, money market accounts, and other near monies

M2 ≡ M1 + savings accounts + money market accounts + other near monies

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Page 12: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

Beyond M2

• There are no rules for deciding what is money and what is not• Example: credit cards• This poses problems for economists and those in charge of economic policy

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Page 13: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

• For our purposes, “money” will always refer to transactions money, M1

• M1 is the sum of two general categories:• Currency in circulation• Deposits

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Page 14: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

AN OVERVIEW OF MONEY

THE PRIVATE BANKING SYSTEM

financial intermediaries Banks and other institutions that act as a link between those who have money to lend and those who want to borrow money

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Page 15: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEYA HISTORICAL PERSPECTIVE: GOLDSMITHS

• Suppose you go to a goldsmith who is functioning only as a depositor and ask for a loan of 20 ounces of gold

• Suppose that the goldsmith has 100 ounces of gold on deposit in his safe and receipts for exactly 100 ounces of gold out to various people who deposited the gold

• If goldsmith decides he is tired of being a mere goldsmith and wants to become a real bank, he will loan some gold

• You actually want a slip of paper that represents 20 ounces of gold

• The goldsmith in essence “creates” money for you by giving you a receipt for 20 ounces of gold

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Page 16: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• There will be receipts for 120 ounces of gold in circulation

instead of the 100 ounces worth of receipts before your loan and the supply of money will have increased

• Goldsmiths-turned-bankers did face certain problems• Once they started to make loans, their receipts

outstanding (claims on gold) were greater than the amount of gold they have had in their vaults

• If the owners of the 120 ounces worth of gold receipts all presented their receipts and demanded their gold at the same time, the goldsmith would be in trouble

• run on a bank Occurs when many of those who have claims on a bank (deposits) present them at the same time

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Page 17: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEYTHE MODERN BANKING SYSTEM

A Brief Review of Accounting• “The books always balance”Assets are things a firm owns that are worth something

• For a bank, these assets include the bank building, cash in its vaults, bonds, stocks, loans, cash on hand and deposits with Central Bank (as banks keep a certain portion of their deposits on hand as vault cash or on deposit with Central Bank)

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Page 18: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

Liabilities are the firm’s debts-what it owes• A bank’s liabilities are the promises to pay and its deposits

Deposits are debts owned to the depositors, because when you deposit money in your account, you are in essence making a loan to the bank

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Page 19: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

• If we add up a firm’s assets and then subtract the total amount it owes to all those who have lent it funds, the difference is the firm’s net worth

Assets − Liabilities ≡ Net Worth

or

Assets ≡ Liabilities + Net Worth

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Page 20: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

• To keep track of a bank’s financial position using a simplified balance sheet called a T-account

• The bank’s assets are listed on the left side and its liabilities and net worth are on the right side

• By definition, the balance sheet always balances, so that the sum of the items on the left side of T-account is exactly equal to the sum of the items on the right side

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Page 21: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

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T-Account for a Typical Bank (millions of dollars)

Page 22: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

• A bank having $110 million in assets of which:• $20 million are reserves (the deposits that the bank has made at Central Bank and its cash on hand)

• $90 million are loans

reserves The deposits that a bank has at the Central Bank plus its cash on hand

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Page 23: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Why do banks hold reserves/deposits at Central Bank?• The most important reason is the legal requirement that they

hold a certain percentage of their deposit liabilities as reserves

required reserve ratio The percentage of its total deposits that a bank must keep as reserves at the Central Bank• If the reserve ratio is 20 percent, then a bank with deposits of

$100 million must hold $20 million as reserves, either as cash or as deposits at Central Bank

• We assume that banks hold all of their reserves in the form of deposits at the Central Bank

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Page 24: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

• On the liabilities side:• The bank has taken deposits of $100 million, so it owes this amount to its depositors

• The bank has a net worth of $10 million to its owners

$110 million in assets - $100 million in liabilities = $10 million net worth

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Page 25: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• When some item on a bank’s balance sheet changes, there must be at least one other change somewhere else to maintain balance

• If bank’s reserves increase by $1, then one of the following must also be true:• Its other assets (loans) decrease by $1• Its liabilities (deposits) increase by $1• Its net worth increases by $1

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Page 26: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEYTHE CREATION OF MONEY

• Banks usually make loans up to the point where they can no longer do so because of the reserve requirement restriction

• A bank’s required amount of reserves is equal to the required reserve ratio times the total deposits in the bank

excess reserves The difference between a bank’s actual reserves and its required reserves

excess reserves ≡ actual reserves − required reserves

• Banks make loans up to the point where their excess reserves are zero

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Page 27: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• If a bank has excess reserves, it has credit available and it can make loans

• A bank can make loans only if it has excess reserves

• When a bank makes a loan, it creates a demand deposit for the borrower

• This creation of a demand deposit causes the bank’s excess reserves to fall because the extra deposits created by the loan use up some the excess reserves the bank has on hand

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Page 28: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

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Balance Sheets of a Bank in a Single-Bank Economy

Page 29: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Assume there is only one private bank in the country

• The required reserve ratio is 20 percent

• The bank starts off with nothing: Panel 1

• Someone deposits $100 in the bank

• The bank deposits the $100 with the central bank and it now has $100 in reserves: Panel 2

• The bank now has assets (reserves) of $100 and liabilities (deposits) of $100

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Page 30: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• If the required reserve ratio is 20 percent, the bank has

excess reserves of $80

• How much can the bank lend and still meet the reserve requirement? (Suppose no cash withdrawal)• With $80 of excess reserves, the bank can have up to

$400 of additional deposits• The $100 in reserves plus $400 in loans (as deposits)

equal $500 in deposits• With $500 in deposits and a required reserve ratio of 20

percent, the bank must have reserves of $100 (that is 20 percent of $500): Panel 3

• The bank can lend no more than $400 because it reserve requirement must not exceed $100

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Page 31: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• The money supply (M1) equals cash in circulation plus deposits

• Before the initial deposit, the money supply was $100 ($100 cash and no deposits)

• After the deposit and the loans, the money supply is $500 (no cash and $500 in deposits)

• When loans are converted into deposits, the supply of money can change

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Page 32: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEYWhat happens when there are many banks?

• Assume that I make an initial deposit of $100 in bank 1 and the bank deposits the entire $100 with the Central Bank: Panel 1

• All loans that a bank makes are withdrawn from the bank as the individual borrowers write checks to pay for merchandise

• After my deposit, bank 1 can make a loan up to $80 to Person X, because given 20 percent required reserve ratio, it needs to keep only $20 of its $100 deposit as reserves

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Page 33: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

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The Creation of Money When There Are Many Banks

Page 34: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Bank 1’s balance sheet at the moment of the loan to Person X appears in Panel 2

• Bank 1 now has loans of $80

• It has credited Person X’s account with the $80, so its total deposits are $180 ($80 in loans plus $100 in reserves)

• Person X then writes a check for $80 for another good to sold by Person Y

• Person Y deposits Person X’s check in bank 2

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Page 35: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

• When the check clears, bank 1 transfers $80 in reserves to bank 2

• Bank 1’s balance sheet: Panel 3

• Bank 1’s assets include reserves of $20 and loans of $80; its liabilities are $100 in deposits

• Both sides balance: The bank’s reserves are 20 percent of its deposits and is fully loaned up

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Page 36: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Look at bank 2

• Because bank 1 has transferred $80 in reserves to bank 2, now it has $80 in deposits and $80 in reserves: Panel 1, bank 2

• Its reserve requirement ratio is also 20 percent, so it has excess reserves of $64 on which it can make loans

• Assume bank 2 loans the $64 to Person Z to pay for a good sold by Person T and Person Z writes a check for $64 payable to Person T

• The final position of bank 2 (transfer of $64 in reserves to bank 3) is reserves of $16, loans of $64 and deposits of $80: Panel 3, bank 2

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Page 37: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Person T deposits Person Z’s check in its account with bank 3

• Bank 3 has excess reserves, because it has added $64 to its reserves

• With a reserve requirement ratio of 20 percent, bank 3 loan out $51.20 (80 percent of $64, leaving 20 percent in required reserves to back the $64 deposit): Panel 3, bank 3

• As the process is repeated over, the total amount of deposits created is $500, the sum of the deposits in each of the banks

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Page 38: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

THE MONEY MULTIPLIER• An increase in bank reserves leads to a greater than one-for-one increase in the money supply

• Economists call the relationship between the final change in deposits and the change in reserves that caused this change the money multiplier

• Stated somewhat differently, the money multiplier is the multiple by which deposits can increase for every dollar increase in reserves

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Page 39: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY• Reserves increased by $100 when the $100 in cash was

deposited in a bank

• The amount of deposits increased by $500 ($100 from the initial deposits, $400 from the loans made by banks from their excess reserves)

• The money multiplier is $500/$100=5

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Page 40: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW BANKS CREATE MONEY

money multiplier The multiple by which deposits can increase for every dollar increase in reserves; equal to 1 divided by the required reserve ratio

Money multiplier ≡ 1/required reserve ratio

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Page 41: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

FUNCTIONS OF THE CENTRAL BANK

• The crucial role is to control the money supply

• The Central Bank also performs several important functions for banks• Clearing interbank payments• Regulating the banking system• Assisting banks in a difficult financial position

• Managing exchange rates and the nation’s foreign exchange reserves

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Page 42: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLYWHAT IS THE ROLE OF RESERVES?

• The required reserve ratio establishes a link between the reserves of the commercial banks and the deposits (money) that commercial banks are allowed to create

• The reserve requirement determines how much a bank has available to lend

• If the required reserve ratio is 20 percent, each of 1 TL of reserves can support 5 TL in deposits

• As the money supply is equal to the sum of deposits inside banks and the currency in circulation outside of banks, reserves provide the power the Central Bank needs to control the money supply

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Page 43: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY• If the Central Bank wants to increase the supply of

money, it creates more reserves, thereby freeing banks to create additional deposits by making more loans

• If it wants to decrease the money supply, it reduces reserves

• Three tools are available to the Central Bank for changing the money supply:

(1) changing the required reserve ratio

(2) changing the discount rate

(3) engaging in open market operations

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Page 44: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE REQUIRED RESERVE RATIO• Assume the initial required reserve ratio is 20 percent

• Panel 1: Central Bank’s balance sheet• Reserves are $100 billion• Currency outstanding is $100 billion• The total value of Central Bank’s assets is $200 billion that is

assumed to be all in government securities

• Assume no excess reserves

• The $100 billion in reserves supports $500 billion in deposits at the commercial banks• The money multiplier equals 1/required reserve ratio=1/0.2=5• Thus $100 billion in reserves can support $500 billion in

deposits

• The supply of money is $600 billion: $100 billion in currency and $500 billion in deposits at the commercial banks

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Page 45: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE REQUIRED RESERVE RATIO

PANEL 2: REQUIRED RESERVE RATIO = 12.5%

Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

Deposits$800$100ReservesReserves$100$200Government

$700LoansCurrency$100securities

Note: Money supply (M1) = Currency + Deposits = $900.

Note: Money supply (M1) = Currency + Deposits = $600.

$400LoansCurrency$100securities

Deposits$500$100ReservesReserves$100$200Government

LiabilitiesAssetsLiabilitiesAssets

Commercial BanksCentral Bank

PANEL 1: REQUIRED RESERVE RATIO = 20%

A Decrease in the Required Reserve Ratio from 20 Percent to 12.5 Percent Increases the Supply of Money (All Figures in Billions of Dollars)

PANEL 2: REQUIRED RESERVE RATIO = 12.5%

Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

Deposits$800$100ReservesReserves$100$200Government

$700LoansCurrency$100securities

Note: Money supply (M1) = Currency + Deposits = $900.

Note: Money supply (M1) = Currency + Deposits = $600.

$400LoansCurrency$100securities

Deposits$500$100ReservesReserves$100$200Government

LiabilitiesAssetsLiabilitiesAssets

Commercial BanksCentral Bank

PANEL 1: REQUIRED RESERVE RATIO = 20%

A Decrease in the Required Reserve Ratio from 20 Percent to 12.5 Percent Increases the Supply of Money (All Figures in Billions of Dollars)

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Page 46: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE REQUIRED RESERVE RATIO• Suppose the Central Bank wants to increase the supply of money to $900 billion

• If it lowers the required reserve ratio from 20 percent to 12.5 percent (Panel 2), then the same $100 billion of reserves could support $800 billion in deposits

• The money multiplier is 1/0.125=8

• The total money supply would be $800 billion in deposits plus the $100 billion in currency, a total of $900 billion

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Page 47: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE REQUIRED RESERVE RATIO• Decreases in the required reserve ratio allow banks to have more deposits with the existing volume of reserves

• As banks create more deposits by making loans, the supply of money (currency plus deposits) increases

• If the Central Bank wants to restrict the supply of money, it can raise the required reserve ratio, in which case banks will find that they have insufficient reserves and must therefore reduce their deposits by “calling in” some of their loans

• The result is a decrease in the money supply

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Page 48: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY

THE DISCOUNT RATE

discount rate Interest rate that banks pay to the Central Bank to borrow from it

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Page 49: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE DISCOUNT RATE• Assume there is only one bank in the country and the required reserve ratio is 20 percent

• The initial position of Central Bank: Panel 1• Assets: $160 securities• Liabilities: $80 reserves and $80 currency

• The initial position of bank: Panel 1• Assets: $80 reserves and $320 loans• Liabilities: $400 deposits

• The money supply (currency plus deposits) is $480

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Page 50: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE DISCOUNT RATE

PANEL 2: COMMERCIAL BANK BORROWING $20 FROM THE CENTRAL BANK

Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

Deposits(+ $300)

$500$100Reserves(+ $20)

Reserves(+ $20)

$100$160Securities

Amount owed to CB (+ $20)

$20$420Loans(+ $100)

Currency$80$20Loans

Note: Money supply (M1) = Currency + Deposits = $580.

Note: Money supply (M1) = Currency + Deposits = $480.

$320LoansCurrency$80

Deposits$400$80ReservesReserves$80$160Securities

LiabilitiesAssetsLiabilitiesAssets

Commercial BanksCentral Bank

PANEL 1: NO COMMERCIAL BANK BORROWING FROM THE CENTRAL BANK

The Effect on the Money Supply of Commercial Bank Borrowing from the Central Bank (All Figures in Billions of Dollars)

PANEL 2: COMMERCIAL BANK BORROWING $20 FROM THE CENTRAL BANK

Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

Deposits(+ $300)

$500$100Reserves(+ $20)

Reserves(+ $20)

$100$160Securities

Amount owed to CB (+ $20)

$20$420Loans(+ $100)

Currency$80$20Loans

Note: Money supply (M1) = Currency + Deposits = $580.

Note: Money supply (M1) = Currency + Deposits = $480.

$320LoansCurrency$80

Deposits$400$80ReservesReserves$80$160Securities

LiabilitiesAssetsLiabilitiesAssets

Commercial BanksCentral Bank

PANEL 1: NO COMMERCIAL BANK BORROWING FROM THE CENTRAL BANK

The Effect on the Money Supply of Commercial Bank Borrowing from the Central Bank (All Figures in Billions of Dollars)

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Page 51: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE DISCOUNT RATE• In Panel 2, the bank has borrowed $20 from the Central Bank

• By using this $20 as a reserve, the bank can increase its loans by $100, from $320 to $420• As required reserve ratio of 20 percent gives a money

multiplier of 5; having excess reserves of $20 allows the bank to create an additional $100 in deposits

• The money supply thus increased from $480 to $580

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Page 52: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:THE DISCOUNT RATE• Bank borrowing from the Central Bank leads to an increase in the money supply

• The Central Bank can influence bank borrowing, and thus the money supply, through the discount rate:• The higher the discount rate, the higher the cost of borrowing, and the less borrowing banks will want to do

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Page 53: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONSOPEN MARKET OPERATIONS

open market operations The purchase and sale by the Central Bank of government securities in the open market; a tool used to expand or contract the amount of reserves in the system and thus the money supply• The most significant tool

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Page 54: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• When the Central Bank purchases a security, the quantity of reserves expands, increasing the money supply

• When the Central Bank sells a security (or bond), the quantity of reserves reduces, decreasing the money supply

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Page 55: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• Suppose that the Central Bank wants to decrease the supply of money

• If it can reduce the volume of bank reserves on the liabilities side of its balance sheet, it will force banks in turn to reduce their own deposits (to meet the required reserve ratio)

• Since these deposits are part of the supply of money, the supply of money will contract

55

Page 56: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• What happens if the Central Bank sells some of its holdings of government securities to the public?

• The Central Bank’s holdings of government securities must decrease

• How do in return the purchasers of securities pay for what they have bought?

• By writing checks drawn on their banks and payable to the Central Bank

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Page 57: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• In Panel 1, the Central Bank has $100 billion of

government securities

• Its liabilities consist of $20 billion of deposits (that are the reserves of commercial banks) and $80 billion of currency

• With the required reserve ratio at 20%, the $20 billion of reserves can support $100 billion of deposits in the commercial banks

• The commercial banking system is fully loaned up

• Zeynep has assets of $5 billion and no debts, so her net worth is $5 billion (look at Panel 1)

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Page 58: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• The Central Bank sells $5 billion in government securities

to Zeynep

• Zeynep pays for the securities by writing a check to the Central Bank, drawn on her bank

• The Central Bank then reduces the reserve account of her bank by $5 billion

• Look at Panel 2

• The supply of money (currency plus deposits) has fallen from $180 billion to $175 billion

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Page 59: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS

Open Market Operations (The Numbers in Parentheses in Panels 2 and 3 Show the Differences Between Those Panels and Panel 1.

All Figures in Billions of Dollars)

$5$5$60Loans( $20)

Currency$80

$0$0Deposits( $25)

$75$15Reserves( $5)

Reserves( $5)

$15$95

LiabilitiesLiabilitiesAssetsLiabilitiesCommercial Banks

PANEL 3Zeynep (Public)Central Bank

AssetsAssets

DebtsDeposits( $5)

Securities( $5)

Net WorthSecurities(+ $5)

Note: Money supply (M1) = Currency + Deposits = $155.

$5

$0

Liabilities

$5

$0

Debts$5

Liabilities

$80

Net Worth

Debts

Currency

Net Worth

Securities(+ $5)

Deposits( $5)

AssetsZeynep (Public)

Deposits

AssetsZeynep (Public)

Deposits( $5)

Deposits

PANEL 2Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

$95$15Reserves( $5)

Reserves( $5)

$15$95Securities( $5)

$80LoansCurrency$80

Note: Money supply (M1) = Currency + Deposits = $175.

Note: Money supply (M1) = Currency + Deposits = $180.

$5$80LoansCurrency$80$0$100$20ReservesReserves$20$100Securities

LiabilitiesAssetsLiabilitiesAssetsCommercial BanksCentral Bank

PANEL 1

Open Market Operations (The Numbers in Parentheses in Panels 2 and 3 Show the Differences Between Those Panels and Panel 1.

All Figures in Billions of Dollars)

$5$5$60Loans( $20)

Currency$80

$0$0Deposits( $25)

$75$15Reserves( $5)

Reserves( $5)

$15$95

LiabilitiesLiabilitiesAssetsLiabilitiesCommercial Banks

PANEL 3Zeynep (Public)Central Bank

AssetsAssets

DebtsDeposits( $5)

Securities( $5)

Net WorthSecurities(+ $5)

Note: Money supply (M1) = Currency + Deposits = $155.

$5

$0

Liabilities

$5

$0

Debts$5

Liabilities

$80

Net Worth

Debts

Currency

Net Worth

Securities(+ $5)

Deposits( $5)

AssetsZeynep (Public)

Deposits

AssetsZeynep (Public)

Deposits( $5)

Deposits

PANEL 2Commercial BanksCentral Bank

LiabilitiesAssetsLiabilitiesAssets

$95$15Reserves( $5)

Reserves( $5)

$15$95Securities( $5)

$80LoansCurrency$80

Note: Money supply (M1) = Currency + Deposits = $175.

Note: Money supply (M1) = Currency + Deposits = $180.

$5$80LoansCurrency$80$0$100$20ReservesReserves$20$100Securities

LiabilitiesAssetsLiabilitiesAssetsCommercial BanksCentral Bank

PANEL 1

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Page 60: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• As a result of the Central Bank’s sale of securities, the amount of reserves has fallen from $20 billion to $15 billion, while deposits have fallen from $100 billion to $95 billion

• With a required reserve ratio of 20 percent, banks must have 0.2X$95=$19 billion in reserves

• Banks are under their required reserve ratio by $4 billion

• So, banks must decrease their loans and their deposits

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Page 61: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• The final equilibrium position is Panel 3

• Commercial banks have reduced their loans by $20 billion

• The change in deposits from Panel 1 to Panel 3 is $25 billion that is 5 times the size of the change in reserves that the Central Bank brought through its $5 billion open market sale of securities

• That is our money multiplier• The change in money (-$25 billion) is equal to the money

multiplier (5) times the change in reserves (-$5 billion)

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Page 62: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• What happens when the Central Bank purchases a government security?

• Suppose Ali holds $100 in Treasury bill, which the Central Bank buys from him

• The Central Bank writes him a check for $100 and Ali then take the $100 check and deposit it in his bank

• This increases the reserves of his bank by $100 and begins a new episode in the money expansion story

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Page 63: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONS• With a reserve requirement ratio of 20%, his bank can now lend out $80

• If that $80 is spent and ends up back in a bank, that bank can lend $64 and so forth

• The Central Bank can expand the money supply by buying government securities from people who own them

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Page 64: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

HOW THE CENTRAL BANK CONTROLSTHE MONEY SUPPLY:OPEN MARKET OPERATIONSWe can sum up the effect of these open market operations

this way:

• An open market purchase of securities by the Central Bank results in an increase in reserves and an increase in the supply of money by an amount equal to the money multiplier times the change in reserves

• An open market sale of securities by the Central Bank results in a decrease in reserves and a decrease in the supply of money by an amount equal to the money multiplier times the change in reserves

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Page 65: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

THE SUPPLY CURVE FOR MONEY• To begin with, the Central Bank’s choice of the value for the money supply does not depend on the interest rate

• We can draw the money supply curve as a vertical line• Assume that the money supply curve is vertical

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Page 66: THE MONEY SUPPLY Chapter 22 1. AN OVERVIEW OF MONEY WHAT IS MONEY? Money is anything that is generally accepted as a medium of exchange A Means of Payment,

THE SUPPLY CURVE FOR MONEY

66

Money supply

Money supply

Inte

rest

rat

e