Money: From Barter to Digital Currency

1. Barter exchange and why it breaks down

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The basic idea

• Barter system: people swap goods or services directly, with no money. It works only when there is a double coincidence of wants. Class 7 uses a simple example: your spare eraser for a classmate's spare pencil.
• A transaction is a piece of business between people, especially buying or selling.
• A commodity is any good that can be traded, bought and sold.
• Across the world, commodities served as the means of exchange. Examples include cowrie shells, salt, tea, tobacco, cloth, cattle (cows, goats, horses, sheep) and seeds.
• Some unusual examples appear in Class 7:
• Rai stones: giant discs of rock used as money on Yap Island in Micronesia.
• Aztec copper tajadero: a knife-shaped copper piece ("chopping knife" in Spanish), used in Central Mexico and parts of Central America.
• Tevau: coils made of red bird feathers, used in the Solomon Islands.

Why barter gets harder as trade grows

• Class 7's farmer: he owns one spare ox but needs shoes, a sweater and medicines for his grandmother.
• First he must find someone who wants an ox. Swapping a whole ox for one pair of shoes is not fair.
• So he swaps the ox for bags of wheat. Then he carries the wheat to three different sellers and bargains with each one.

• He must store the leftover wheat, and carry it again the next time he needs something.

• Class 12's example: a woman with surplus rice who wants cloth. She has to find someone with the exact opposite need, i.e. surplus cloth and a need for rice. As the number of traders grows, these search costs become prohibitive.

• Class 10's example: the shoe-maker who wants wheat must find a wheat farmer who also wants shoes. The cartoon puts it well: "I don't need shoes. I need clothes."

The five failures of barter, each matched to a property money must have

Barter problem	What it means	Farmer-story illustration	Property money provides
Double coincidence of wants	Each party must have exactly what the other wants	Finding someone who wants an ox and has shoes	Money is accepted by everyone
No common standard measure of value	No agreed way to decide how much of one good equals another	How many bags of wheat for a sweater?	Money works as a unit of account
Divisibility	Whether an object can be split into portions	Part of an ox cannot be exchanged for a sweater	Money comes in small units
Portability	Whether an object can be carried from place to place	Taking the ox (or the wheat) everywhere	Money is light and easy to carry
Durability	Whether an object lasts and can be stored for a long time	Stored wheat rots or is eaten by rats	Money does not spoil

Barter that still exists

• Junbeel Mela: a three-day annual fair at Junbeel in Morigaon district, Assam. "Jun" means moon and "beel" means wetland.
• It began in the 15th century as a yearly meeting of chiefs of the Tiwa, Karbi, Khasi and Jaintia communities of Assam and Meghalaya. They met to discuss political issues and keep friendly ties.
• It opens with the Agni Puja, a fire worship for universal wellbeing.

• Hill communities trade roots, vegetables, fruit, herbs, spices and forest handicrafts. In return they get rice cakes and other foods from the plains that cannot be grown in the hills.

• Old clothes for utensils: vendors go door to door and give new utensils for used clothes, which they later resell or recycle.

• Book-exchange clubs: children swap books they have read.

2. What money is and what it does

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Definition

• Money is the commonly accepted medium of exchange that makes market transactions easy (Class 12, Money and Banking).
• A single person, or a family living alone on an island, has no use for money.

• Money becomes important as soon as two or more people trade through a market.

• In a modern economy, money = cash + bank deposits.

• Class 7 defines it as "the common tool that everybody accepts and uses" to make or receive payments.

Functions of money

• The functions of money are the roles it plays: two primary and two secondary. High inflation can weaken all of them.

Type	Function	Meaning	NCERT illustration
Primary	Medium of exchange	An in-between good that everyone accepts, so barter is no longer needed	Sell shoes for money, then buy wheat (Class 10)
Primary	Unit of account (common denomination)	The value of every good is stated in money units, so relative prices can be worked out	Pen ₹10 ÷ pencil ₹2 = a pen is worth 5 pencils (Class 12)
Secondary	Store of value	Carries wealth into the future at low cost	Rice rots and needs space; money does not (Class 12)
Secondary	Standard of deferred payment	Money is accepted for payments made later	Pay ₹50 now and ₹50 later for a ₹100 book (Class 7)

Purchasing power of money

• The purchasing power of money is the amount of goods one unit of money can buy.
• From the example above: 1 rupee = 1 ÷ 2 = 0.5 pencil, or 1 ÷ 10 = 0.1 pen.

• Value of money = 1 / price. So when the general price level rises, each rupee buys less. Class 12 calls this a "deterioration in the purchasing power of money".

• Money's worth is the value a person places on an object, based on the benefit they get from it. Prices expressed in money let us compare this worth across different goods.

Store of value: why money is better

• Money does not spoil, costs little to store, and "is acceptable to anyone at any point of time".
• Condition: it works only if the value of money is fairly stable.
• Gold, land, houses and bonds also store value. But they are harder to convert into other goods and are not accepted by everyone. In other words, they are less liquid.

How inflation damages the functions of money

• Rising prices first damage store of value and deferred payment. Savers and lenders lose because they get back rupees that buy less.
• In hyperinflation even the primary functions fail. People refuse the currency (medium of exchange) and start pricing goods in foreign money (unit of account). Examples beyond NCERT: Weimar Germany in 1923, Zimbabwe in 2008 and Venezuela in the late 2010s.
• Link to policy: price stability is the precondition for money to do its job. This is the logic behind inflation targeting.

Keynes' line: "The importance of money flows from it being a link between the present and the future." This is the epigraph of Class 7. It sums up the store-of-value and deferred-payment roles.

3. Commodity money and coinage in India

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Earliest money

• Commodity money: early forms of money such as grains and cattle, followed by gold, silver and copper coins, all used before modern currency.
• Class 10 says Indians used grains and cattle "since the very early ages", and that the metallic-coin phase continued "well into the last century".

Punch-marked coins

• Kārṣhāpaṇa (or paṇa): ancient Indian coins made of gold, silver, copper or their alloys. Symbols were punched on them, and these symbols were called rūpas.
• They date from around the 6th century BCE. Class 10 shows a photo of punch-marked coins "may be 2500 years old".

• The word survives today: paṇam in Tamil, Telugu and Malayalam, and haṇa in Kannada, both mean money.

• Arthaśāstra examples (Class 7 exercise):

• An annual salary of 60 paṇas could be replaced by 1 āḍhaka of grain (about 3 kg) per day, enough for four meals.
• The fine for failing to help a neighbour was 100 paṇas, more than a whole year's salary. This shows that civic duty was taken seriously.

Coinage and minting

• Coinage: coins issued by rulers in precious metals or alloys. These were among the earliest forms of money. The coins of powerful rulers came to be accepted across kingdoms, which helped trade across regions.
• Minting: the process of producing coins. A mint is the facility that makes a nation's coins. In ancient times, rulers fully controlled minting and issue.
• Obverse (head, main design) and reverse (tail) carried motifs such as animals, trees, hills, kings, queens and deities.

• Example: the Chalukyas of Kalyana put Varaha (an avatar of Viṣhṇu) on one side and a three-tiered royal parasol on the other.

• Roman gold coins have been found at Pudukkottai (Tamil Nadu) and in Kerala. Scholars conclude that India's maritime trade was in India's favour: Roman gold flowed in to pay for Indian goods.

• Beyond NCERT:
• Kushana and Gupta rulers issued gold coins.
• Sher Shah Suri's silver rupiya (1540s, about 178 grains) is the ancestor of the rupee.

Token money and Gresham's law

• Muhammad bin Tughlaq's token currency, c. 1329-30. Class 10 shows a photo of a Tughlaq coin.
• He issued brass and copper tokens at the face value of silver coins.
• People forged them in huge numbers, and the tokens had to be withdrawn.

• Lesson: token money works only if the issuer can control its supply.

• Gresham's law: "bad money drives out good".

• When two forms of money circulate at a fixed legal ratio, people hoard or melt the undervalued ("good") money.
• The overvalued ("bad") money is what stays in circulation.

The anna system and decimalisation

• Old units: 1 rupee = 16 annas = 64 pice = 192 pies.
• Class 7: in 1947, one anna could buy a dozen bananas.

• Class 7 shows a quarter anna (1918), a half anna (1942), an anna (1943) and a paisa (1945).

• Decimalisation: on 1 April 1957 the rupee was divided into 100 naye paise. The word "naye" (new) was dropped in 1964.

Coins today

• They are alloys made mostly of iron, with chromium, silicon and carbon in precise proportions (ferritic stainless steel).
• Coins of different denominations have different sizes, and each carries both Hindi and English.
• Special coins mark national events. Example: the coin for 75 years of Independence (2021).

4. Paper money, the rupee note and denominations

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Why paper money

• As coins were used for everything, from buying vegetables to buying land, carrying and storing large numbers of them became impractical.
• Paper money: currency notes used for higher denominations. It was first used in China and introduced in India in the late 18th century.
• China: the jiaozi of the Song dynasty, 11th century (beyond NCERT).

• India: early private and presidency-era issuers included the Bank of Hindostan (1770) and the General Bank of Bengal and Bihar (1773) (beyond NCERT).

• Class 7 shows uniface notes of the Bank of Bengal (printed on one side only) and a ₹10 note of the Bank of Bombay. These were Presidency banks.

Milestones in the Indian note

Year	Event
1861	Paper Currency Act gives the Government of India the monopoly of note issue; Presidency banks stop issuing notes
1935	RBI set up; note issue passes to RBI
1938	First RBI note: ₹5 (bearing George VI)
1949	Post-Independence ₹1 note with the Ashoka Lion Capital
1996	Mahatma Gandhi series
2016 onward	Mahatma Gandhi (New) series, with heritage motifs on the reverse

Reverse motifs of the MG (New) series (Class 7 asks students to find these on ₹50 and ₹100 notes)

• ₹10: Konark Sun Temple
• ₹20: Ellora Caves
• ₹50: Hampi, with the stone chariot
• ₹100: Rani ki Vav (Patan)
• ₹200: Sanchi Stupa
• ₹500: Red Fort
• ₹2000: Mangalyaan (now withdrawn)

Help for visually impaired users

• Intaglio (raised) printing and identification marks let people feel the denomination.
• RBI's MANI mobile app (2020) identifies notes by camera.

Denominations

• A denomination is the unit in which coins and notes are classified, e.g. ₹1, ₹2 and ₹5 coins, and ₹10 to ₹500 notes.
• Coins are used for small values and notes for large values.
• Current set:
• Coins: 50 paise, ₹1, ₹2, ₹5, ₹10, ₹20

• Notes: ₹10, ₹20, ₹50, ₹100, ₹200, ₹500

• Class 7's list is outdated (NCERT: "…₹500 and ₹1000" notes; now: the ₹1000 note was demonetised in November 2016).

• The ₹2000 note was introduced in November 2016. RBI announced its withdrawal from circulation on 19 May 2023, but it remains legal tender.

The ₹ symbol

• Adopted by the Government of India on 15 July 2010.
• Designed by D. Udaya Kumar of IIT Bombay.
• It blends the Devanagari "Ra" (र) and the Roman "R", with two parallel horizontal lines on top.

5. Fiat money and India's currency authority

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Why a worthless piece of paper is accepted

• The paper in a ₹100 note is worth far less than ₹100. The metal in a ₹5 coin is "probably not worth ₹5" (Class 12, Money and Banking).
• Their value comes from the guarantee of the issuing authority.
• Every note carries the RBI Governor's promise: "I promise to pay the bearer the sum of … rupees". The note also says "Guaranteed by the Central Government". Class 10's exercise asks students to read this on a ₹10 note.
• Fiat money: notes and coins that have no intrinsic value. Their value comes from the issuer's guarantee ("fiat" means "by order").
• Full-bodied commodity money: a gold or silver coin whose metal is worth its face value.
• Currency: paper notes and coins with no intrinsic value, used as the medium of exchange.
• In India, RBI issues banknotes.

• The central government issues coins and ₹1 notes.

• Class 10 says modern currency "is without any use of its own". It is accepted because the government authorises it.

• Main message: money is a social contract. Trust in the issuer replaced the value of the metal itself.

Who issues what

Item	Legal basis	Issuer	Where made
Banknotes (₹10 upward)	RBI Act 1934, s.22 (sole right)	RBI; signed by the Governor	Nashik and Dewas presses (SPMCIL, owned by GoI); Mysuru and Salboni presses (BRBNMPL, an RBI subsidiary)
Coins and ₹1 note	Coinage Act 2011	Government of India; ₹1 note signed by the Finance Secretary	Mints at Mumbai, Hyderabad, Kolkata and Noida (SPMCIL)

• Coins are put into circulation only through RBI.
• NCERT error: Class 7 says "It is not legal for anybody other than the RBI to issue currency". Class 10 says something similar. In fact, the Government of India issues coins and ₹1 notes. RBI's monopoly covers banknotes only.

What backs the notes

• Proportional reserve system (1935-56): 40% of the assets backing notes had to be in gold coin, gold bullion or sterling securities.
• Minimum reserve system (1956-57 onward): RBI must hold at least ₹200 crore of gold and foreign assets as backing for currency, of which at least ₹115 crore must be gold.
• This fixed floor is tiny compared with today's currency stock. So note issue is not really limited by gold. Its real anchor is trust and monetary policy.

Seigniorage

• Seigniorage is the profit a central bank or government earns from issuing money: face value minus cost of production.
• A ₹500 note costs only a few rupees to print but buys ₹500 of goods.
• RBI earns seigniorage because it holds interest-earning assets against its note liabilities. This income feeds the surplus RBI transfers to the government.
• RBI's annual spend on printing notes runs to several thousand crore (verify current from the latest RBI Annual Report).

6. Legal tender and its withdrawal: demonetisation

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Legal tender

• Legal tender is money that no citizen can refuse in settlement of any transaction. Notes and coins are legal tender; cheques are not.
• Unlimited legal tender: RBI banknotes, for any amount.
• Limited legal tender: coins, under the Coinage Act 2011.
• ₹1 and above: for sums up to ₹1,000.

• 50 paise: for sums up to ₹10.

• Cheques drawn on demand deposits can be refused. So demand deposits are money but not legal tender.

• Demonetisation means withdrawing legal-tender status from a series of notes. This is done by a Government of India notification under RBI Act s.26(2), on RBI's recommendation.

Indian episodes

Year	Notes withdrawn	Legal route
January 1946	₹500, ₹1000, ₹10,000	Ordinance
January 1978	₹1000, ₹5000, ₹10,000	High Denomination Bank Notes (Demonetisation) Act, 1978
8 November 2016	Old ₹500 and ₹1000 notes ("Specified Bank Notes"), about 86% of currency by value	Notification under s.26(2)

2016: the details (Class 12, Box 3.2)

• Aims: tackle corruption, black money, terror financing and fake currency.
• New ₹500 and ₹2000 notes were launched.
• Deposit windows:
• In bank accounts without any declaration until 31 December 2016.

• With RBI, with a declaration, until 31 March 2017.

• Exchange limit: ₹4,000 of old notes per person per day.

• Old notes remained valid until 12 December 2016 at petrol pumps, government hospitals and for government dues (taxes, power bills).
• Result: about 99.3% of the ₹15.41 lakh crore of specified notes came back to banks (RBI Annual Report 2017-18). Very little "black money" was destroyed as cash.
• Specified Bank Notes (Cessation of Liabilities) Act, 2017: ended RBI's liability on the old notes and made holding them beyond a small limit an offence.
• Supreme Court: upheld the decision by 4:1 in January 2023 (Vivek Narayan Sharma v. Union of India).

Class 12's balance sheet of 2016

• Costs:
• Long queues at banks and ATMs.

• A cash crunch that hurt economic activity for a while.

• Gains claimed:

• Better tax compliance and a wider tax net.
• Savings pulled into the formal financial system, giving banks more funds to lend at lower rates.
• A signal that tax evasion will not be tolerated.

• A shift from cash to electronic payments.

• Class 10's teacher note says the same thing: after 2016, people were pushed towards cheques, cards, POS machines and UPI QR codes.

Contrast: the ₹2000 note in 2023

• It was withdrawn from circulation but kept as legal tender. That makes it a clean-note policy step, not a demonetisation.

Liquidity effects of demonetisation → banking-monetary-policy; the digital push → payment-systems-digital-finance.

7. Modern forms of money: currency, deposits and digital money

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Modern money = currency + deposits with banks (Class 10, Money and Credit)

• Currency:
• Not made of precious metal and has no use in itself.
• Accepted because the government authorises it.

• Rupee payments cannot legally be refused in India.

• Demand deposits:

• People put spare cash in banks. For example, salaried workers have extra cash at the start of the month.
• These deposits are safe and earn some interest.
• They can be withdrawn on demand, which is why they are called demand deposits.

Cheques: why deposits count as money

• A cheque is a paper instructing the bank to pay a specific amount from the payer's account to the person named on it.
• Class 10's example:
• Shoe manufacturer M. Salim pays his leather supplier by cheque.
• The supplier deposits the cheque in his own bank.

• The money moves from one bank account to the other "in a couple of days", with no cash used.

• Because demand deposits are widely accepted as a means of payment, they "share the essential features of money".

• "But for the banks, there would be no demand deposits". Modern money is tied to the banking system.
• Time deposits (fixed deposits) earn more interest but cannot be spent directly until they mature.

Digital money

• Digital money is intangible money in electronic form. It moves through debit and credit cards, net banking and UPI, not through coins and notes.
• Class 7's example: Krishnappa's fruit cart has a QR code. Customers scan it and the payment goes straight into his bank account.
• Key distinction: cards, net banking and UPI are channels. They move existing deposit money between accounts; they do not create new money.

• Class 10: plastic cards are "not all money per se".

• e₹ (CBDC) is the exception. It is a digital form of central-bank currency itself, a direct liability of RBI like a note.

• RBI pilots began in 2022: wholesale in November, retail in December.

• Cryptocurrencies (e.g. Bitcoin) are neither legal tender nor money in India. No sovereign guarantee stands behind them.

• Class 12 on the cashless society: transactions happen through digital information rather than notes and coins. India's building blocks:
• Jan Dhan accounts
• Aadhaar-enabled payment systems
• e-wallets
• the National Financial Switch (NFS)
• mobile-phone penetration

Crypto-assets → financial-markets-instruments; CBDC design → banking-monetary-policy; UPI rails → payment-systems-digital-finance.

8. Demand for money: why people hold it

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Liquidity preference

• Money is the most liquid asset: everyone accepts it.
• Holding money has an opportunity cost: the interest you give up by not holding bonds or fixed deposits.
• So deciding how much money to hold is a trade-off between liquidity and forgone interest. This is why money demand is called liquidity preference.
• General rule (Class 12):
• Money demand rises with income, because there are more transactions.
• Money demand falls as the interest rate rises.

1. Transaction motive

• People hold money because income comes in at fixed points, while spending goes on continuously.
• Individual example:
• You earn ₹100 on the 1st and spend it evenly through the month.
• Your balance is ₹100 at the start and ₹0 at the end.

• Average holding = (100 + 0) ÷ 2 = ₹50, which is half your monthly transactions.

• Two-person economy:

• A firm pays a worker ₹100 at the start of the month. The worker spends it on the firm's output during the month.
• Each holds ₹50 on average, so money demand = ₹100.
• Monthly transactions = ₹200 (₹100 of labour services + ₹100 of goods).

• So each rupee changes hands twice a month.

• Formulas:

• M_T^d = k·T (k is a positive fraction; T is the nominal value of transactions per period)
• v·M_T^d = T, where v = 1/k is the velocity of circulation. Here v = 1 ÷ ½ = 2.
• Money demand is a stock (held at a point in time). T is a flow (per period). v has a time dimension.

• Since transactions move with nominal GDP: M_T^d = kPY (P = price level or GDP deflator; Y = real GDP). Transaction demand rises with both real income and prices.

• Precautionary motive (Keynes, beyond NCERT): people hold money for emergencies. It is usually grouped with transaction demand.

2. Speculative motive

• Setting: all non-money assets are treated as "bonds". A bond's price = the present value (PV) of its future returns.
• Worked example: a ₹100, two-year bond with a 10% coupon.
• At a 5% interest rate: PV = 10/1.05 + 110/(1.05)² ≈ ₹109.29
• At a 6% interest rate: PV = 10/1.06 + 110/(1.06)² ≈ ₹107.33

• So bond prices move inversely with interest rates. Competitive bidding pushes the bond price to its PV.

• Chain of reasoning:

• When r is low, most people expect it to rise. A rise in r means bond prices fall, giving a capital loss to bondholders. So people sell bonds and hold money, and speculative demand is high.

• When r is high, people expect it to fall and expect capital gains on bonds. So they buy bonds, and speculative demand is low.

• Formula: M_S^d = (r_max − r)/(r − r_min)

• At r = r_max, demand = 0.

• As r approaches r_min, demand approaches ∞.

• Total demand: M^d = kPY + (r_max − r)/(r − r_min)

• NCERT error: equation 3.5 in Class 12 prints the second term without its minus signs.

Liquidity trap

• At r_min, everyone expects rates to rise and holds only money.
• Any extra money supply is simply absorbed into money holdings. Bond demand does not rise, so r cannot fall further.
• Money demand is infinitely elastic at this point.
• Real examples: Japan in the 1990s; the US and Europe at the zero lower bound after 2008.

Quantity theory of money

• Theory: if velocity and output are constant, the price level changes in proportion to the money supply.
• Fisher's equation of exchange: MV = PT
• Cambridge cash-balance version: M = kPY. Class 12's M_T^d = kPY is the same idea.
• India's income velocity = nominal GDP ÷ M3.
• 2024-25: about ₹331 lakh crore ÷ ₹272.87 lakh crore ≈ 1.2 (verify current).
• It has fallen over time as financial deepening raises the M3-to-GDP ratio.

Policy use of money-market equilibrium → banking-monetary-policy; how money causes inflation → inflation-price-indices.

9. Measuring the money supply: M0 to M4

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Basics

• Money supply: the total stock of money held by the public at a point in time. Like money demand, it is a stock variable.
• "Net" means only the public's deposits count. Interbank deposits (deposits one bank keeps with another) are excluded.
• Reserve money (M0), also called high-powered money or the monetary base:
• M0 = currency in circulation + bankers' deposits with RBI + other deposits with RBI.
• It is the base on which banks create deposits.

RBI's four measures

Measure	Definition	Type
M1	Currency with the public + net demand deposits of banks + other deposits with RBI (Class 12 simplifies this to CU + DD)	Narrow
M2	M1 + savings deposits with post office savings banks	Narrow
M3	M1 + net time deposits of banks ("aggregate monetary resources"; the most used measure)	Broad
M4	M3 + total post office deposits, excluding National Savings Certificates	Broad

• Liquidity decreases from M1 to M4. M1 is the easiest to spend; M4 is the least liquid.
• Near money: highly liquid assets such as time deposits and treasury bills. They convert easily into cash but are not themselves used for payment.
• New monetary aggregates (Y.V. Reddy Working Group on Money Supply, 1998):
• NM1, NM2 and NM3, which classify deposits by residency and maturity.
• Liquidity aggregates L1, L2 and L3, which add postal deposits, deposits with financial institutions and NBFC public deposits.
• RBI's regular releases now focus on M0, M1 and M3 (verify which series RBI currently publishes).

Data from Class 12 (Tables 3.4-3.5, source: RBI Handbook of Statistics on Indian Economy 2024-25)

Year	M1 (₹ lakh crore)	M3 (₹ lakh crore)	M3 ÷ M1
1999-2000	3.42	11.24	3.3
2015-16	26.03	116.18	4.5
2016-17	26.82	127.92	4.8
2024-25	65.84	272.87	4.1

• The gap between M3 and M1 is time deposits. M3 is about 4.1 × M1 in 2024-25.
• Demonetisation effect:
• Currency in circulation fell from ₹16.63 lakh crore (2015-16) to ₹13.35 lakh crore (2016-17).
• By 2017-18 it had recovered to ₹18.29 lakh crore, and it reached ₹37.24 lakh crore in 2024-25.

• In 2016-17 M1 barely grew, while M3 rose as cash was deposited into banks.

• NCERT error: Table 3.5 prints currency with the public for 2016-17 as 124124. The correct figure is 13,35,266 − 71,142 = ₹12,64,124 crore.

• Policy use: M3 growth was the main policy indicator in RBI's monetary-targeting era (1985-1998), before the multiple-indicator approach and then inflation targeting (2016) → banking-monetary-policy.

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Exam angles

Prelims — high-yield facts and traps

• Functions of money:
• Primary: medium of exchange and unit of account.
• Secondary: store of value and standard of deferred payment.
• "Store of value works regardless of inflation": FALSE. It needs price stability.

• Purchasing power of money = 1/price level.

• Barter failures: double coincidence of wants, no common measure of value, divisibility (part of an ox), portability, durability (rotting wheat).

• Junbeel Mela is in Morigaon, Assam, and is run by the Tiwa, Karbi, Khasi and Jaintia communities.
• Fiat money vs legal tender vs deposits:
• Notes and coins are fiat money and legal tender.
• Demand deposits are money but NOT legal tender.
• Coins are limited legal tender: ₹1 and above up to ₹1,000; 50 paise up to ₹10.
• "₹2000 notes are no longer legal tender": FALSE.

• Cryptocurrency is not legal tender.

• Issuers:

• "RBI alone issues all currency": FALSE. RBI issues notes (s.22); GoI issues coins and ₹1 notes (Coinage Act 2011), and the ₹1 note is signed by the Finance Secretary.
• Minimum reserve system: ₹200 crore, of which ₹115 crore is gold.

• Note presses: Nashik, Dewas, Mysuru, Salboni. Mints: Mumbai, Hyderabad, Kolkata, Noida.

• Chronology:

• Punch-marked coins (c. 6th century BCE)
• Tughlaq's token currency (1329-30)
• Sher Shah's rupiya (1540s)
• Paper money in India (late 18th century)
• Paper Currency Act (1861)
• RBI begins note issue (1935); first RBI note (1938)
• Decimalisation (1 April 1957)
• ₹ symbol (15 July 2010)
• Demonetisations (1946, 1978, 2016)

• ₹2000 withdrawal (May 2023)

• Demonetisation 2016: 8 November; about 86% of currency by value; 99.3% of ₹15.41 lakh crore returned; notified under s.26(2); Supreme Court upheld it 4:1 in January 2023.

• Money supply:
• M2 and M4 include post office deposits; NSCs are excluded from M4.
• "Net" excludes interbank deposits.
• M1 and M2 are narrow money; M3 and M4 are broad money.
• Liquidity falls from M1 to M4.
• M3 = aggregate monetary resources.
• M0 = reserve money.

• Near money (time deposits, T-bills) is not a means of payment.

• Theory:

• Bond price and interest rate move inversely.
• Speculative demand falls as r rises.
• Liquidity trap = infinitely elastic money demand at r_min.
• v = 1/k; MV = PT; M = kPY.

• Gresham's law: bad money drives out good.

• ₹ symbol: designed by D. Udaya Kumar (IIT Bombay); blends Devanagari "Ra" and Roman "R".

Mains — GS-III themes

1. Money as a social institution built on trust. It moved from commodity to fiat to digital. Can UPI and e₹ make cash obsolete, and what would be lost (privacy, resilience during outages, inclusion of the digitally excluded)?
2. Demonetisation 2016 judged against its stated goals (black money, counterfeits, terror finance, digitisation, tax base). Use the 99.3% return figure, the costs to the informal sector and MSMEs, and the long-term formalisation gains.
3. Price stability as the precondition for money's functions. How inflation erodes store of value and deferred payment, and the case for inflation targeting.
4. The liquidity trap and the limits of monetary policy. Why money demand and velocity matter, and what falling velocity says about financial deepening.
5. India's "cash paradox": currency in circulation keeps rising alongside the UPI boom. Discuss precautionary demand, the informal economy and low interest rates on small savings.

Current-affairs hooks

• RBI Annual Report (May): currency in circulation, share of ₹500 notes, counterfeits detected, printing cost, status of ₹2000 note returns.
• New note series, signature changes, commemorative coins; legal-tender clarifications (e.g. RBI reminders that ₹10 coins must be accepted).
• RBI fortnightly money-supply data and the Handbook of Statistics: M3 growth vs deposit and credit growth. The Economic Survey chapter on monetary management.
• Demonetisation anniversaries and the 2023 Supreme Court verdict; e₹ pilot expansion; crypto regulation and taxation debates.