The M2 money supply measure, tracked weekly by the Federal Reserve, represents a broad monetary aggregate including cash, checking deposits, savings accounts, small time deposits, and retail money market funds. This crucial monetary policy metric encompasses various components: M1 (currency and checkable deposits, 25%), savings deposits (62%), small time deposits (5%), and retail money funds (8%). Growth patterns reflect both policy decisions (monetary base expansion) and endogenous money creation through the banking system (money multiplier effects). The data includes detailed institutional breakdowns, currency-to-deposit ratios, and velocity measurements. Historical analysis shows significant structural changes due to financial innovation, regulatory shifts, and crisis responses (notably during the 2008 financial crisis and COVID-19 pandemic). This indicator strongly influences inflation expectations, interest rate dynamics, and financial stability assessments, with particular relevance for monetary policy transmission mechanisms and banking system liquidity analysis.