M1 money supply explained: definition and meaning
By Ken Chigbo, Founder, KenMacro. Published 2026-05-13.
Quick answer
M1 money supply is the narrow measure of money that includes physical currency in circulation, demand deposits at commercial banks, and other checkable deposits. It captures balances available for immediate spending, sitting one step broader than M0 and forming the transactional core of any monetary aggregate framework.
What is M1 money supply?
M1 money supply is a monetary aggregate published by central banks that totals the most liquid forms of money held outside the banking system. It comprises notes and coins in circulation (M0), demand deposits held at commercial banks, traveller’s cheques where still reported, and other checkable deposits that can be spent without conversion. M1 sits between the monetary base and broader aggregates such as M2 and M3, which add savings deposits, time deposits, and money market instruments. The Federal Reserve, ECB, Bank of England, and Bank of Japan each publish their own M1 series on slightly different definitions, so cross-country comparisons require care.
How traders use M1 money supply
The desk treats M1 growth as a coincident gauge of transactional liquidity rather than a direct trade trigger. Sharp accelerations in M1 typically follow large-scale asset purchases or fiscal transfers, and persistent contractions accompany aggressive tightening cycles. Macro traders cross-reference M1 against credit growth, reserve balances, and reverse repo usage to assess whether liquidity is reaching the real economy or staying parked in the banking system. Institutional desks pair M1 with velocity estimates to frame nominal growth expectations, which feeds into rates and currency views. Retail traders most often encounter M1 in central bank releases and academic models of inflation, where year-on-year changes are compared against CPI and nominal GDP to test the quantity theory of money in practice.
Common misconceptions about M1 money supply
M1 is not the money the central bank prints. That role belongs to M0, the monetary base, which captures notes, coins, and bank reserves held at the central bank. M1 is also not a leading indicator of inflation on its own; the link between M1 growth and CPI depends on velocity, credit demand, and fiscal stance. A further confusion arises from definitional changes. In 2020 the Federal Reserve reclassified savings deposits into M1, producing an apparent jump that reflected accounting, not new money creation. Always check the methodology note before comparing M1 series across periods or jurisdictions.
Frequently asked
What is the difference between M0 and M1 money supply?
M0, the monetary base, covers physical currency in circulation plus commercial bank reserves held at the central bank. M1 is broader: it includes the currency component of M0 held outside banks, then adds demand deposits and other checkable deposits at commercial banks. M0 reflects central bank liabilities directly, while M1 reflects money available to households and firms for immediate transactions. Both are reported separately in central bank statistical releases.
Does rising M1 cause inflation?
Not automatically. The quantity theory of money links the price level to money supply, velocity, and real output. M1 can rise sharply without inflation if velocity falls or if the additional balances are saved rather than spent, as occurred in several jurisdictions after 2008. Conversely, inflation can rise without strong M1 growth when supply shocks dominate. The desk treats M1 as one input among many, not a standalone forecast for CPI.
Where can I find M1 money supply data?
The Federal Reserve publishes US M1 in the weekly H.6 Money Stock Measures release, with historical data on FRED. The European Central Bank publishes euro area M1 monthly in its Monetary Developments release. The Bank of England reports comparable aggregates in its Money and Credit statistical release. Each series follows a slightly different definition, so consult the methodology notes when comparing across regions.
Why did US M1 jump in May 2020?
The Federal Reserve revised its definition to include savings deposits within M1, following the elimination of the Regulation D six-withdrawal limit on savings accounts. The change was statistical, not economic: no new money was created at the moment of reclassification. The series remains useful, but pre-May 2020 and post-May 2020 readings are not directly comparable without adjustment. Always check release notes when working with monetary aggregates across regime changes.
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