Money Supply and Inflation
M1, M2, M3, M4, M0 — five measures of money supply. CPI, WPI, GDP deflator — three inflation measures. RBI publishes M3 data fortnightly and uses CPI (combined) as key inflation measure since April 2014. This chapter is your banker’s guide to monetary economics.
Sections 1–3 — Why This Chapter Matters
Money supply and inflation drive every RBI decision that affects your bank
Section 4 — Key Definitions and Concepts
All definitions verified from your textbook
Money is anything which performs the following four functions: (1) Medium of Exchange — goods and services are ‘priced’ in money and exchanged using money. (2) A Measure of Value — money is used to measure and record the value of goods or services. (3) A Store of Value over Time — money can be held over a period of time and used to finance future payments. (4) Standard for Deferred Payments — money is used as an agreed measure of future receipts and payments in contracts.
Five Measures of Money Supply in India
Money Multiplier = M₃ / M₀ (broad money / reserve money)
Velocity of Money = Nominal GDP / Broad Money (M₃)
Inflation refers to a sustained rise in the general level of prices of goods and services in an economy over a period of time. Inflation leads to a fall in purchasing power — when price level rises, each unit of currency buys fewer goods. A chief measure of price inflation is the inflation rate — the annualised percentage change in a general price index over time. Formula: Inflation = (Current Price Index − Previous Year Index) × 100 / Previous Year Index. Example from textbook: (183.40 − 176.20) × 100 / 176.20 = 4.09%.
Three Price Indices — CPI, WPI, GDP Deflator
| Index | What it measures | Base Year | Released by | Frequency | Key Note |
|---|---|---|---|---|---|
| CPI (Consumer Price Index) | Change in prices of basket of goods/services purchased/consumed by households — measures at RETAIL level | 2012 = 100 | NSO (National Statistical Office) | Monthly | RBI uses CPI (combined) as key measure since April 2014. Also publishes CFPI (Consumer Food Price Index) |
| WPI (Wholesale Price Index) | Change in prices of basket of goods at WHOLESALE level — focus on goods traded between corporations | 2011-12 | Office of Economic Advisor, DPIIT | Monthly | Three groups: Primary Articles (22.6%), Fuel & Power (13.2%), Manufactured Products (64.2%). Food Index: 24.4% |
| GDP Deflator | Level of prices of ALL new domestically produced final goods and services — not a fixed basket | Changes with patterns | NSO (with GDP estimates) | Quarterly only | Also called implicit price deflator. Most comprehensive measure — covers entire range of goods produced. Formula: (Nominal GDP / Real GDP) × 100 |
CPI Basket Weights (Base: 2012=100)
| Group | Rural Weight % | Urban Weight % | Combined Weight % |
|---|---|---|---|
| Food and Beverages | 54.18 | 36.29 | 45.86 |
| Pan, Tobacco and Intoxicants | 3.26 | 1.36 | 2.38 |
| Clothing and Footwear | 7.36 | 5.57 | 6.53 |
| Housing | — | 21.67 | 10.07 |
| Fuel and Light | 7.94 | 5.58 | 6.84 |
| Miscellaneous | 27.26 | 29.53 | 28.32 |
| General Index (All Groups) | 100.0 | 100.0 | 100.0 |
| Consumer Food Price Index (CFPI) | 47.25 | 29.62 | 39.06 |
Demand-pull inflation is a rise in general prices caused by increasing aggregate demand for goods and services. When the quantity of money in the hands of the people increases, aggregate demand for goods and services rises, and if aggregate supply does not follow suit (i.e., production cannot keep up), prices rise. Think: government gives everyone ₹10,000 stimulus — everyone rushes to buy the same goods — prices shoot up. This is pure demand-pull inflation — too much money chasing too few goods.
Cost-push inflation is a type of inflation caused by substantial increases in the cost of production of important goods or services where no suitable alternative is available. Example: if prices of key inputs like oil rise, producers either reduce output supply or translate higher costs into higher output prices. When output declines due to cost pressure, shortages occur in markets and prices rise. Think: crude oil price triples → transportation costs rise → every product price rises. This is cost-push — supply contracts, prices rise.
Section 5 — Exam Angle Points
All 7 PYQ answers plus high-frequency facts
✅ Must-Know Facts — Verified from PDF
- Money supply refers to: The amount of money in circulation in an economy (NOT just banks, NOT just people)
- RBI publishes money supply data: On a fortnightly basis
- M₁ (Narrow Money): Currency with public + Demand deposits with banking system + ‘Other’ deposits with RBI
- M₂: M₁ + Savings deposits of post office savings banks
- M₃ (Broad Money): M₁ + Time deposits with banking system
- M₄: M₃ + All deposits with post office savings banks (excluding NSCs)
- M₀ (Reserve Money): Currency in circulation + Bankers’ deposits with RBI + ‘Other’ deposits with RBI
- Demand deposits: Paid on demand — includes current deposits, savings bank demand liabilities, etc.
- Time deposits: NOT paid on demand — includes fixed deposits, cash certificates, recurring deposits
- Time deposits are: Not paid on demand AND relatively less liquid than cash and demand deposits = BOTH (b) and (c)
- Money multiplier: M₃ / M₀ (broad money / reserve money) | Friedman and Schwartz (1963)
- Velocity of Money: Nominal GDP / Broad Money | Frequency with which one unit of currency is used
- Inflation: Sustained rise in general level of prices | Leads to fall in purchasing power
- Both true about inflation: Rise in general price level + fall in purchasing power = BOTH (a) and (b)
- Demand-pull inflation: Rise in prices caused by increasing aggregate demand
- Cost-push inflation: Rise in prices caused by substantial increase in cost of production
- CPI base year: 2012 = 100 | Released by NSO monthly
- RBI’s key inflation measure (since April 2014): CPI (Consumer Price Index — combined) — NOT WPI
- CPI measures prices at: Retail level (NOT wholesale, NOT producer)
- WPI base year: 2011-12 | Released by Office of Economic Advisor, DPIIT | Monthly
- WPI three commodity groups: Primary Articles (22.6%) + Fuel & Power (13.2%) + Manufactured Products (64.2%)
- GDP deflator: NOT based on fixed basket | Quarterly only | Also called implicit price deflator
- Core Inflation: CPI excluding volatile food and energy components
- DA for bank employees: Based on All India Average CPI for Industrial Workers with Base 1960 = 100
📝 All 7 PYQ Answers from PDF
Section 6 — Memory Tricks
Trick 1 — Money Supply Measures M0 to M4
Trick 2 — Demand vs Time Deposits
Trick 3 — CPI vs WPI
Trick 4 — Demand-Pull vs Cost-Push
Sections 7–9 — Visual, Flash Cards and Summary
Chapter 14 mind map — money supply measures, inflation causes, price indices, deposits
⚡ Chapter 14 Complete — Money Supply and Inflation
- Money performs 4 functions: Medium of exchange, Measure of value, Store of value over time, Standard for deferred payments
- M₁ (Narrow Money) = Currency with public + Demand deposits + Other deposits with RBI
- M₂ = M₁ + Savings deposits of post office savings banks
- M₃ (Broad Money) = M₁ + Time deposits with banking system | RBI publishes fortnightly
- M₄ = M₃ + All post office savings bank deposits (excluding NSCs)
- M₀ (Reserve Money) = Currency in circulation + Bankers’ deposits with RBI + Other deposits with RBI
- Money Multiplier = M₃/M₀ | Velocity of Money = Nominal GDP / Broad Money
- Demand deposits: PAID ON DEMAND | Time deposits: NOT paid on demand (less liquid)
- Inflation = sustained rise in general prices | Leads to fall in purchasing power
- Causes: Demand-pull (aggregate demand rises) + Cost-push (production cost rises)
- Three price indices: CPI (retail, NSO, monthly, base 2012=100) | WPI (wholesale, DPIIT, monthly, base 2011-12) | GDP deflator (quarterly, comprehensive)
- RBI adopted CPI (combined) as key inflation measure since April 2014 (previously WPI)
- CPI basket: Food 45.86% + Housing 10.07% + Fuel 6.84% + Misc 28.32% (combined weights)
- Core inflation = CPI excluding volatile food and energy | DA for bank employees = CPI-IW base 1960=100
Banky says: “Now I know WHY RBI watches CPI monthly — it’s measuring my customers’ cost of living!” 🎉
All 7 PYQs answered, M1 to M4 locked, demand vs time deposits clear, CPI vs WPI distinction mastered! 💪