what does m4 measure
M4 is the main broad measure of money supply in the UK. It is similar to the M3 measure used in some other countries. M4 includes everything in M2 (also called the retail component of M4) plus:1  other deposits with an original maturity of up to five years. 2  other claims on financial institutions such as repos and bank acceptances.4 is the main broad measure of money supply in the UK. It is similar to the M3 measure used in some other countries. M4 includes everything in M2 (also called the retail component of M4) plus: