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 There are two definitions of money: M1 and M2 money supply. M1 money supply includes those monies that are very liquid such as cash, checkable (demand) deposits, and traveler’s checks M2 money supply is less liquid in nature and includes M1 plus savings and time deposits, certificates of deposits, and money market funds. Two key monetary aggregates, M1 and M2, have grown quickly recently—especially M1, the narrow aggregate. In this post, we show that we can attribute most, but not all, of the recent high money growth rate of M1 to low current interest rates as well as the growth in bank reserves that has resulted from the Fed’s asset purchase programs.