m1 means: The U.S. currency stock is measured in the following: 1. Currency held by the public, i.e. Outside the U.S. Treasury and Federal Reserve Banks and the vaults at depository institution; 2 travellers checks issued by banks; 3 demand deposits at commercial bank excluding amounts held by the U.S. government and other official institutions. 4 Other checkable deposits OCDs consisting of negotiable orders of withdrawal NOW, automatic transfer service (ATS) accounts at credit unions and demand deposits at thrift organizations. (in Stock Market Dictionary)