Also: money stock. The stock of money that exists in an economy at a given time. Stabilizing prices by steering the money supply is an important economic policy target. In Switzerland, money supply policy measures focused for some years (until 1978) on M1 (circulation of coins and notes in the non-banking sector and domestic non-bank demand deposits at banks and in postal checking accounts). In 1980 the Swiss National Bank began setting a new money supply target based on the adjusted central bank money supply. Factoring in further monetary aggregates (time deposits, savings) gives M2 and M3. The latter has served as reference parameter for the Swiss National Bank since 1997.