Explanation:

What is 'M3'
M3 is a measure of the money supply that includes M2 as well as large time deposits, institutional money market funds, short-term repurchase agreements and other larger liquid assets. The M3 measurement includes assets that are less liquid than other components of the money supply and are referred to as "near, near money," which are more closely related to the finances of larger financial institutions and corporations than to those of small businesses and individuals.
M2 is a measure of the money supply that includes all elements of M1 as well as "near money." M1 includes cash and checking deposits, while near money refers to savings deposits, money market securities, mutual funds and other time deposits. These assets are less liquid than M1 and not as suitable as exchange mediums, but they can be quickly converted into cash or checking deposits.