M3 Money Supply YoY is the annual percent change in broad money, published monthly by the ECB, the euro area central bank. It starts with the January 1999 reference month. Issuers are MFIs, namely central banks, deposit-taking banks and money market funds, plus certain central government accounts. Holders are euro area residents other than MFIs and the central government, including households, non-financial firms, non-bank firms, and state, local and social security funds.
It is not lending or inflation, nor central government or non-resident holdings, nor longer-term bank liabilities over 2 years. The ECB keeps a 4.5% reference value as a medium-term benchmark for price stability, not a target that forces action. The series always refers to the euro area countries that had adopted the euro at the reference date.