Money supply

Story hook

Every fortnight, just past midnight on a Friday, the Reserve Bank of India posts a single PDF on its website titled "Money Supply Reserve Money for the fortnight ended ___". The document is barely two pages. It carries a single table of three-letter codes — M0, M1, M2, M3 — with rupee figures running into lakh crores.

In the days that follow, that table will be parsed by bond desks at Citi, HSBC, and ICICI Securities pricing the next G-sec auction. Equity analysts at brokerages will read it for "liquidity overhang" signals. The RBI's Monetary Policy Committee will weigh it against inflation prints before the next policy meeting. And in newspaper columns, economists will debate whether M3 growth at 10% versus 11% means inflation is around the corner.

But money isn't just cash. It's currency with the public, demand deposits, time deposits, the Reserve Bank's own liabilities to itself, and the deposits commercial banks hold with the RBI. How exactly does the central bank measure "how much money is in the economy", and why do four different yardsticks (M0 to M3) exist when one number might do? Welcome to monetary aggregates.

Why this matters for UPSC

Money supply and monetary aggregates fall under GS-III Indian Economy ("monetary policy, banking"). Prelims tests M0 to M3 definitions and components with near-certain frequency every 2-3 years — these are favourite UPSC questions because the definitions are precise and the trap permutations are many. Mains asks liquidity management and money multiplier questions in the context of monetary policy. Interview panels test the candidate's grasp of how RBI controls money supply through CRR, SLR, OMO, and why M3 is treated as the "broad money" anchor.