How to Calculate M1 and M2 Money Supply

Understanding money supply is crucial for analyzing economic health and monetary policy. M1 and M2 are two key measures of the money supply that help economists assess liquidity in the economy. This guide explains how to calculate both measures, their differences, and practical applications.

What is Money Supply?

The money supply refers to the total amount of currency and other liquid financial instruments in an economy. It represents the total value of money that exists in the form of cash, demand deposits, and other highly liquid assets.

Money supply is measured in different ways, with M1 and M2 being the most commonly used measures. These measures help economists understand the availability of money in the economy and its impact on economic activity.

Key Point: The money supply is a critical indicator of economic liquidity. Changes in money supply can influence inflation, interest rates, and economic growth.

M1 vs M2 Money Supply

M1 and M2 are two different measures of the money supply, each with its own definition and components.

M1 Money Supply

M1 is the narrowest measure of the money supply. It includes:

Currency in circulation (physical cash)
Demand deposits (checking accounts)
Other highly liquid assets

M2 Money Supply

M2 is a broader measure of the money supply that includes all components of M1 plus:

Savings deposits (time deposits)
Small-denomination time deposits
Money market mutual funds
Other near-money financial instruments

Comparison: M1 represents the most liquid portion of the money supply, while M2 includes less liquid assets that can be quickly converted to cash if needed.

Calculating M1 Money Supply

To calculate M1, you need to sum the following components:

Currency in circulation
Demand deposits
Other highly liquid assets

Formula: M1 = Currency + Demand Deposits + Other Highly Liquid Assets

Currency refers to physical cash held by the public. Demand deposits are the balances in checking accounts that can be accessed immediately. Other highly liquid assets include money market funds and other short-term financial instruments.

Note: M1 is a more liquid measure of the money supply compared to M2. It represents the money that is most readily available for transactions.

Calculating M2 Money Supply

M2 is calculated by adding the components of M1 to the following additional components:

Savings deposits
Small-denomination time deposits
Money market mutual funds
Other near-money financial instruments

Formula: M2 = M1 + Savings Deposits + Small-Denomination Time Deposits + Money Market Mutual Funds + Other Near-Money Instruments

Savings deposits are balances in time deposit accounts that can be accessed after a certain period. Small-denomination time deposits are time deposits with a small balance. Money market mutual funds are investment funds that hold short-term securities. Other near-money instruments include certificates of deposit and commercial paper.

Note: M2 is a broader measure of the money supply that includes less liquid assets. It provides a more comprehensive view of the total money available in the economy.

Example Calculation

Let's walk through an example to illustrate how to calculate M1 and M2 money supply.

Assumptions

Currency in circulation: $100 billion
Demand deposits: $200 billion
Other highly liquid assets: $50 billion
Savings deposits: $150 billion
Small-denomination time deposits: $30 billion
Money market mutual funds: $70 billion
Other near-money instruments: $40 billion

Calculations

First, calculate M1:

M1 = Currency + Demand Deposits + Other Highly Liquid Assets

M1 = $100B + $200B + $50B = $350 billion

Next, calculate M2 by adding the additional components to M1:

M2 = M1 + Savings Deposits + Small-Denomination Time Deposits + Money Market Mutual Funds + Other Near-Money Instruments

M2 = $350B + $150B + $30B + $70B + $40B = $640 billion

Results

In this example, the M1 money supply is $350 billion, and the M2 money supply is $640 billion. This shows that M2 is significantly larger than M1, reflecting the broader scope of assets included in the M2 measure.

Component	Amount
Currency	$100 billion
Demand Deposits	$200 billion
Other Highly Liquid Assets	$50 billion
Savings Deposits	$150 billion
Small-Denomination Time Deposits	$30 billion
Money Market Mutual Funds	$70 billion
Other Near-Money Instruments	$40 billion
M1 Total	$350 billion
M2 Total	$640 billion

Frequently Asked Questions

What is the difference between M1 and M2 money supply?

M1 is a narrow measure of the money supply that includes currency, demand deposits, and other highly liquid assets. M2 is a broader measure that includes all components of M1 plus savings deposits, small-denomination time deposits, money market mutual funds, and other near-money financial instruments.

Why is money supply important in economics?

Money supply is important because it affects economic activity, inflation, and interest rates. A larger money supply can stimulate economic growth but may also lead to inflation if not managed properly. Central banks monitor money supply to maintain price stability.

How do central banks control the money supply?

Central banks control the money supply through monetary policy tools such as open market operations, reserve requirements, and discount rates. They aim to maintain stable prices and promote economic growth by adjusting the money supply.

Can money supply be negative?

No, money supply cannot be negative. It represents the total value of money in circulation, which is always a positive amount. However, changes in money supply can be positive or negative, indicating increases or decreases in the total money available.