3.4 The Reserve Bank of India — The Banker's Bank

Almost every modern country has a single central bank. India got its central bank in 1935 with the establishment of the Reserve Bank of India^?, headquartered in Mumbai. The RBI was nationalised in 1949 and now operates under the Reserve Bank of India Act, 1934. It performs six classical functions of a central bank.

3.4.1 Currency Authority

The most visible function of the RBI^? is the issue of currency notes. Under Section 22 of the RBI Act, 1934, the RBI has the sole right to issue all currency notes of denominations ₹2 and above. (The ₹1 note and all coins are issued by the Government of India, although they too circulate through RBI channels.) Notes are printed at four currency presses — Mysore, Salboni, Nashik and Dewas. RBI maintains a Note Issue Department whose accounts are kept separately from those of the rest of the bank.

3.4.2 Banker to the Government

The RBI maintains the cash balances of the central and state governments, accepts receipts and makes payments on their behalf, and floats and redeems government bonds (G-Secs, T-bills). It manages the country's public debt: when the Government of India needs to borrow, the RBI auctions G-Secs in the market on its behalf.

3.4.3 Banker's Bank — Custodian of Cash Reserves

Every commercial bank in India is required to maintain cash reserves with the RBI under the Cash Reserve Ratio (CRR)^?. These reserves act as a safety buffer and are the lever through which the RBI influences the lending capacity of the banking system. Beyond statutory reserves, the RBI also clears interbank settlements — when SBI customer A pays HDFC customer B, the net settlement happens through these reserve accounts.

3.4.4 Lender of Last Resort

When commercial banks are short of liquidity and cannot borrow from the market, they may approach the RBI. The RBI's willingness to lend in such moments — at the bank rate, the repo rate, or under the Marginal Standing Facility (MSF) — keeps a temporary liquidity squeeze from snowballing into a systemic banking panic. This crucial role is called the lender of last resort^?.

3.4.5 Controller of Credit / Monetary Authority

This is the macro-economically most important function. The RBI controls the supply of money in the economy through quantitative tools (CRR, SLR, repo rate, OMO) and qualitative tools (margin requirements, moral suasion, credit allocation). Each is studied in detail in Part 3.

3.4.6 Custodian of Foreign Exchange Reserves

The RBI holds and manages India's foreign exchange reserves — currently in the range of US $640–700 billion (2024–25), among the largest in the world. It also intervenes in the foreign exchange market to smooth excessive volatility in the rupee.

3.5 Commercial Banks — The Workhorses of the Banking System

Commercial banks^? are the second pillar of the money-creating system. They mediate between people with surplus funds and those who need funds. They have three classical functions.

Why people prefer banks. Just like the villagers preferred to keep their gold with Lala the goldsmith, depositors today prefer to keep funds with banks because (i) banks pay interest on deposits; (ii) deposits are safer than cash at home; and (iii) demand deposits make transactions cheap and fast through cheques, debit cards, NEFT/RTGS and UPI. Carrying ₹50 lakh in cash to buy a flat is unthinkable — but a single cheque or a single UPI transfer settles it in seconds.

The bank's "spread". Commercial banks earn the difference between the interest charged on loans and the interest paid to depositors — this spread is the bank's gross profit before operating costs.

3.5.1 The Bank's Balance Sheet

A balance sheet is a record of assets and liabilities of any firm. For a bank, the picture has a peculiar shape:

NCERT's opening illustration: a fictional bank starts when Ms Fernandes deposits ₹100 with it; the bank in turn deposits the entire ₹100 as reserves with the RBI. So:

If we assume there is no currency in circulation outside the bank, total money supply M1 = Currency + Deposits = 0 + 100 = ₹100. So far, no money has been created. The magic begins when the bank starts to lend.

3.6 Money Creation by the Banking System — The Multiplier in Action

3.6.1 The Goldsmith Story Revisited

Recall NCERT's Lala-the-goldsmith story from Part 1. The villagers' gold deposits totalled 100 kg; Lala issued paper receipts for 100 kg and people exchanged the receipts as money. Now Ramu asks Lala for a loan of 25 kg of gold. Can Lala lend? The 100 kg already has claimants — but Lala notices that not everyone withdraws on the same day. So he lends 25 kg of gold to Ramu, who pays Ali, who deposits it back with Lala for a fresh 25-kg receipt. The receipts in circulation have now risen from 100 kg to 125 kg. Lala has created money out of thin air. Modern banking works exactly the same way.

3.6.2 Two Brakes on Lending — CRR and SLR

Could banks then create unlimited money? No. The RBI imposes two reserve requirements as legal brakes:

3.6.3 Worked Example: ₹100 → ₹500 (CRR = 20%)

NCERT's Table 3.2 walks through the multiplier process. Assume a single bank, no currency leakage, CRR = 20%, and Leela makes the original deposit of ₹100. Round by round, the bank lends out 80% of every fresh deposit; the borrower spends it; the recipient redeposits; and so on. The cascade ends when total required reserves equal ₹100 (i.e., when total deposits reach ₹500, since 20% of 500 = 100).

Final balance sheet: Reserves ₹100 + Loans ₹400 = Deposits ₹500. With currency in circulation = 0, money supply M1 = 0 + 500 = ₹500. The original ₹100 has become ₹500 — money supply has multiplied fivefold.

3.6.4 The Money Multiplier — One-Line Formula

Mathematically, the multiplier is the sum of the infinite geometric series 1 + (1−r) + (1−r)² + … where r is the reserve ratio. Using the formula for the sum of an infinite GP (NCERT Appendix 3.1): S = a / (1−common ratio) = 1 / r = 1/CRR.

3.6.5 Why Higher CRR Cuts Money Supply

If the RBI raises CRR from 20% to 25%, the same ₹100 in reserves now supports only ₹400 of deposits (1/0.25 = 4). Banks would have to call back some loans to meet the higher reserve requirement. Money supply contracts. Conversely, a CRR cut releases lending capacity and expands money supply. This is one of the most powerful tools the RBI has — small CRR changes ripple through the economy in a big way.

3.6.6 The Worked NCERT Example: ₹100 + 10% CRR → ₹1,000

The case the brief asks for: take a primary deposit of ₹100 and a CRR of 10%. Money multiplier m = 1/0.10 = 10. Total deposits supported = 100 × 10 = ₹1,000. Total loans created = 1,000 − 100 = ₹900. Reserves held = 100. Successive lending: Round 1 lend ₹90 of a ₹100 deposit; Round 2 lend ₹81 of a ₹90 redeposit; … the geometric series 90 + 81 + 72.9 + 65.61 + … sums to ₹900 over infinite rounds.

3.6.7 Limitations of Credit Creation

The textbook multiplier 1/CRR is the maximum creation. In practice it leaks for several reasons:

• Currency drain — borrowers don't redeposit the entire loan; some is held as cash by the public, leaking out of the multiplier process.
• Excess reserves — banks may hold reserves above the CRR for safety, especially during recessions, reducing actual lending.
• Demand for loans — there must be borrowers willing to take loans. In a slowdown, even cheap credit goes uncollected.
• SLR — banks must additionally keep liquid assets (currently 18%), further trimming lendable resources.
• Capital adequacy norms (Basel III) — banks must maintain a minimum capital base relative to risk-weighted assets, restricting riskier lending.