Commercial Banks — Types, Functions & Services

Why This Chapter Matters

If Chapter 4 taught you which banks exist, this chapter teaches you what actually controls them. Every IBPS and SBI paper carries questions on the current repo rate, CRR, SLR, and what happens to inflation or liquidity when RBI raises or cuts one of these tools. This is also one of the few GA topics that overlaps with the Quantitative Aptitude and Reasoning mindset the exam rewards: once you understand the cause-and-effect chain behind each tool, you stop memorizing numbers and start predicting answers, even for a rate you have never explicitly revised.

The biggest mistake aspirants make here is treating repo rate, reverse repo rate, and the Marginal Standing Facility (MSF) as three unrelated numbers to memorize separately. They are not separate; they are three points on the same interest-rate corridor, and the moment you see them as one connected structure, the exam questions about "which is higher than repo" or "which increases liquidity" stop being guesswork. This chapter builds that structure from the ground up: the tools, the committee that sets them, the inflation-targeting law behind the whole exercise, and how each tool actually moves money in the economy.

What Is Monetary Policy?

Monetary policy is the process by which the central bank, RBI in India's case, controls the supply of money and the cost of credit in the economy to achieve specific macroeconomic goals: primarily controlling inflation, while also supporting growth and maintaining financial stability. RBI does this not by printing or withholding currency notes directly on a daily basis, but by adjusting a small set of interest rates and reserve requirements that ripple through the entire banking system.

Think of the banking system as a large network of water pipes, and RBI as the authority controlling the main valve at the source. RBI does not control every tap in every house, that is, every bank's lending decision to every individual customer, but by tightening or loosening the main valve, it changes how much water (money) flows through the whole network, and at what pressure (interest rate). A small turn of RBI's valve eventually changes what you pay on your car loan or earn on your fixed deposit, even though RBI never touches your bank account directly.

The Repo Rate

The repo rate (repurchase rate) is the interest rate at which RBI lends short-term funds to commercial banks against government securities as collateral, under a repurchase agreement, where the bank sells the security to RBI with a promise to buy it back later at a slightly higher price, the difference being the interest. This is the single most important and most frequently tested rate in this chapter, and it is the tool RBI's Monetary Policy Committee formally announces and revises.

When RBI raises the repo rate, borrowing from RBI becomes costlier for banks. Banks pass this cost on by raising interest rates on the loans they give to businesses and individuals. Higher loan interest rates discourage borrowing, which slows spending and investment, cooling down demand in the economy, which in turn helps bring down inflation. This is called a contractionary or "hawkish" monetary stance.

When RBI cuts the repo rate, the opposite chain runs: banks borrow cheaply from RBI, pass on lower rates to borrowers, credit becomes more attractive, spending and investment pick up, and economic activity accelerates. This is called an expansionary or "dovish" stance, typically used when growth is sluggish and inflation is under control.

Memory hook: Think of the repo rate as the price of borrowing an umbrella from a shop during a light drizzle. When the shop raises the umbrella rental price (repo rate up), fewer people bother renting umbrellas, so fewer people are out spending money on errands (borrowing slows, demand cools). When the shop drops the rental price (repo rate down), everyone grabs an umbrella and heads out to spend (borrowing and demand pick up).

Exam trap: A very common wrong answer pattern asks "what happens to inflation when repo rate rises" and tempts students to think inflation rises too, confusing the rate direction with the outcome direction. Remember: repo rate up generally means inflation control (inflation should ease over time), not inflation rising. The rate and the intended inflation outcome move in opposite directions.

The Reverse Repo Rate

The reverse repo rate is the mirror image of the repo rate: it is the rate at which RBI borrows money from commercial banks, by selling them government securities with a promise to buy them back later. In effect, banks park their surplus funds with RBI overnight and earn interest at this rate.

The reverse repo rate is a liquidity absorption tool. When RBI raises the reverse repo rate, banks find it more attractive to park spare cash with RBI rather than lend it out to businesses or consumers, since they earn a safe, guaranteed return from RBI itself. This pulls money out of active circulation in the economy, reducing overall liquidity. When RBI cuts the reverse repo rate, parking money with RBI becomes less attractive, nudging banks to lend that money out instead, increasing liquidity.

Exam trap: Students frequently mix up which rate is normally higher. Under RBI's standard Liquidity Adjustment Facility (LAF) corridor, the repo rate sits ABOVE the reverse repo rate, because RBI wants lending to it (reverse repo, banks parking cash) to earn less than borrowing from it (repo, banks taking cash) costs, keeping the system biased toward productive lending rather than idle parking. Since 2020, RBI has also used the Standing Deposit Facility (SDF), introduced in April 2022, as the effective floor of the corridor for absorbing liquidity, functioning much like the reverse repo but without requiring RBI to offer collateral securities in return.

Cash Reserve Ratio (CRR)

The Cash Reserve Ratio (CRR) is the minimum percentage of a bank's total deposits (technically, Net Demand and Time Liabilities, or NDTL) that the bank must keep with RBI in cash form, earning no interest on it. Every commercial bank operating in India must comply with the CRR RBI announces from time to time.

CRR is a direct liquidity control lever. If RBI raises CRR, banks must lock away a larger slice of their deposits with RBI, leaving them with less money available to lend out, which shrinks the money supply and tends to raise lending rates as loanable funds get scarcer. If RBI cuts CRR, banks free up more cash to lend, increasing money supply and generally softening lending rates.

Memory hook: Picture CRR as a mandatory "tax jar" a shopkeeper must fill with a fixed percentage of every rupee earned, sealed and untouchable, before spending the rest of the day's earnings on stock and expenses. A higher tax-jar percentage (higher CRR) leaves the shopkeeper with less cash to actually run the business (less credit available in the economy); a lower percentage frees up more working cash.

CRR earns the bank zero interest, an important distinguishing detail from SLR, discussed next, where banks at least earn a return on the securities they hold.

Statutory Liquidity Ratio (SLR)

The Statutory Liquidity Ratio (SLR) is the minimum percentage of a bank's NDTL that it must maintain in the form of liquid assets, cash, gold, or approved government securities (G-Secs), but importantly, these assets are held by the bank itself, not surrendered to RBI as with CRR.

Because banks hold SLR assets themselves, typically as government securities that pay interest, SLR does earn the bank a return, unlike CRR. SLR serves two purposes examiners like to test together: it acts as a prudential safety cushion, ensuring banks always hold a base of safe, liquid assets, and it is also a mechanism that channels bank funds into government securities, effectively helping the government finance its borrowing needs at a captive, stable demand base.

Raising SLR reduces the funds banks have free to lend as regular credit, since more must sit in government securities, tightening liquidity similarly to a CRR hike, though through a different mechanism. Cutting SLR releases funds for regular lending.

Exam trap: The CRR-versus-SLR distinction is one of the most reliably tested pairs in the whole syllabus. Remember it this way: CRR = cash, held with RBI, earns nothing. SLR = cash/gold/G-Secs, held by the bank itself, earns interest. If a question describes an asset "held with RBI in cash form only," it means CRR. If it mentions "gold or government securities held by the bank," it means SLR.

Bank Rate

The Bank Rate is the rate at which RBI lends money to commercial banks for long-term needs, without any collateral requirement, distinguishing it from the repo rate, which is collateralized and short-term. Historically, before the repo rate became RBI's primary policy tool in the 2000s, the Bank Rate was the main signal of RBI's monetary stance. Today, RBI keeps the Bank Rate aligned with the MSF rate (explained next), moving in lockstep with it, and it primarily now serves as the benchmark for calculating penalties on banks that fail to maintain their CRR or SLR requirements.

Marginal Standing Facility (MSF)

The Marginal Standing Facility (MSF) is an emergency overnight borrowing window that RBI created in May 2011, allowing banks to borrow funds from RBI against government securities when they face an acute, unexpected shortage of liquidity, even beyond what they can normally access through the repo window. Banks can borrow under MSF by dipping into their SLR holdings, an exception to the usual rule that SLR securities cannot be used for other purposes.

MSF is deliberately priced as the most expensive borrowing option in RBI's toolkit, set at a fixed margin above the repo rate (typically 25 basis points higher, though this spread has varied), so that banks treat it strictly as a last resort rather than a routine funding source.

Memory hook: "The interest-rate ladder, bottom to top." Picture RBI's rate corridor as a ladder with the SDF (or reverse repo) as the lowest rung, the repo rate as the middle rung, and the MSF rate as the top rung. Money parked at the bottom rung earns the least; money borrowed at the top rung costs the most. Banks climb this ladder only as far as they must, preferring the cheaper repo window whenever possible, and reaching for the costly MSF only in genuine emergencies.

Open Market Operations (OMO)

Open Market Operations (OMO) refer to RBI buying or selling government securities in the open market to directly manage liquidity, distinct from the fixed-rate windows like repo and reverse repo. When RBI buys government securities from banks and the public, it injects cash into the system, since the seller receives payment, increasing overall liquidity. When RBI sells government securities, it absorbs cash out of the system, since buyers pay RBI for the securities, reducing liquidity.

OMOs are typically used to fine-tune day-to-day or week-to-week liquidity conditions, complementing the broader policy signal sent through the repo rate. A related tool, Market Stabilisation Scheme (MSS), allows RBI to issue short-term government securities specifically to absorb excess liquidity, often used to manage large capital inflows from abroad without disturbing the regular government borrowing programme.

Exam trap: Students sometimes confuse OMO with SLR or CRR changes. OMO is a market transaction (buying/selling securities in the open market), while CRR and SLR are regulatory ratio requirements imposed on banks. Both affect liquidity, but through entirely different mechanisms: one is a trade, the others are mandated reserve rules.

The Monetary Policy Committee (MPC)

The Monetary Policy Committee (MPC) is the body legally empowered to set the repo rate in India. It was constituted under an amendment to the RBI Act, 1934, following the Finance Act, 2016, formally establishing India's shift to a rule-based, committee-driven approach to setting interest rates, replacing the earlier system where the RBI Governor alone effectively decided the rate after internal consultation.

The MPC has six members: three from RBI, the RBI Governor (who chairs the committee and holds a casting vote in case of a tie), the Deputy Governor in charge of monetary policy, and one more RBI official nominated by the RBI Central Board; and three external members appointed by the Government of India, chosen for expertise in economics, banking, finance, or monetary policy.

The MPC meets to review and decide the repo rate periodically, at least four times a year as mandated, though in practice it typically meets around six times a year (bi-monthly), and each decision requires a majority vote, with each member's individual vote recorded and published, along with the reasoning, in the meeting minutes, released with a short lag after the decision.

Exam trap: The Governor does NOT have a permanent veto or extra weight in the normal vote count; each of the six members gets one vote. The Governor's special power is only the casting vote used to break a tie, a distinction examiners test precisely because students assume the Governor automatically "wins."

The Inflation-Targeting Framework

India formally adopted a flexible inflation targeting (FIT) framework in 2016, under an agreement between the Government of India and RBI, giving RBI a clear numerical mandate rather than a vague growth-and-stability goal. The framework sets the inflation target based on the Consumer Price Index (CPI), Combined, at 4%, with a tolerance band of plus or minus 2%, meaning RBI aims to keep CPI inflation between 2% and 6%.

If inflation breaches this band and stays outside it for three consecutive quarters, RBI is legally required to submit a report to the Government of India explaining the reasons for the failure, the corrective steps proposed, and an expected timeframe to bring inflation back within target, an accountability mechanism unique to this framework and a frequently tested specific fact.

Memory hook: Picture the inflation target as a cricket team's chase target set at 4 runs per over, with the umpires tolerating anywhere from 2 to 6 runs per over as an acceptable range across the innings. If the scoring rate strays outside that band for three overs running (three quarters), the captain, RBI, must formally explain to the selectors, the government, why the chase went off script and how the team plans to correct course.

This inflation-targeting framework is reviewed and can be reset periodically by the government in consultation with RBI, and it forms the legal backbone behind why the MPC exists in its current form: the committee's entire job is to use the repo rate as the primary lever to keep CPI inflation inside that 2-6% corridor.

How the Tools Work Together: A Practical Walkthrough

It helps to see all these tools acting together rather than in isolation, since real monetary policy decisions combine them. Imagine inflation is running persistently above 6%, breaching the upper tolerance band, driven by high food and fuel prices along with strong consumer demand. The MPC would typically respond by raising the repo rate, making borrowing costlier across the economy, while RBI might simultaneously conduct OMO sales to mop up surplus liquidity directly from the market, and could nudge CRR upward if it judges that banks are still flush with lendable cash despite the rate hike. Each tool tightens a different valve in the same pipeline, and together they cool down demand until inflation eases back toward the 4% target.

Conversely, in a growth slowdown with inflation comfortably low, the MPC would cut the repo rate, RBI might conduct OMO purchases to inject liquidity, and CRR might be trimmed to free up more lendable funds for banks, all pushing in the expansionary direction together to revive borrowing, investment, and consumption.

Exam trap: A repeatedly tested conceptual question asks which tools affect liquidity "directly" versus "through cost of credit." CRR, SLR, and OMO change the quantity of money available (direct liquidity tools). Repo rate, reverse repo, and MSF change the cost of that money (price-based tools), which then indirectly influences how much borrowing actually happens. Both categories ultimately shape money supply, but through different mechanisms, and examiners like testing whether you can classify a given tool correctly into one bucket or the other.

Recent Rate Trends, Explained Conceptually

Rather than memorizing a specific number that will change by the time you sit the exam, understand the pattern: through 2022 and into 2023, RBI ran a sustained rate-hiking cycle, raising the repo rate in multiple steps, responding to a global inflation surge driven by pandemic-era supply disruptions and the spike in commodity prices following the Russia-Ukraine conflict's effect on energy and food markets. Once inflation cooled and moved back comfortably within the 2-6% band through 2024 and 2025, the MPC shifted toward a more accommodative or neutral stance, trimming rates to support growth as price pressures eased.

Exam trap: Whatever the exact repo rate figure is when you sit your exam, always check the latest MPC press release date in your final week of revision, since this is the one number in this entire chapter guaranteed to have moved since this book was written. Understanding the direction and the reasoning behind a rate change is worth more marks than memorizing a number that expires within months.

Quick Revision — One-Line Facts

• Monetary policy is RBI's control over money supply and credit cost to manage inflation and growth.
• Repo rate: rate at which RBI lends short-term funds to banks against securities; raising it is contractionary.
• Reverse repo rate: rate at which RBI borrows from banks, absorbing liquidity when raised.
• Under the standard LAF corridor, repo rate is higher than reverse repo rate.
• Standing Deposit Facility (SDF), introduced April 2022, now anchors the corridor's lower bound.
• CRR: minimum % of NDTL banks must hold as cash with RBI; earns zero interest.
• SLR: minimum % of NDTL held as cash/gold/G-Secs by the bank itself; earns interest.
• CRR is held with RBI; SLR is held by the bank; this is the key exam-testable distinction.
• Bank Rate: long-term, collateral-free lending rate, kept aligned with the MSF rate today.
• MSF (Marginal Standing Facility): emergency overnight borrowing window, introduced May 2011.
• MSF is priced above the repo rate, making it the costliest borrowing route for banks.
• OMO: RBI buying/selling government securities in the open market to manage liquidity directly.
• OMO purchase = liquidity injected; OMO sale = liquidity absorbed.
• MSS (Market Stabilisation Scheme) absorbs excess liquidity from large capital inflows.
• MPC (Monetary Policy Committee) was constituted under the Finance Act, 2016 amendment to the RBI Act, 1934.
• MPC has 6 members: 3 from RBI (including the Governor as Chair) and 3 external experts.
• The RBI Governor holds a casting vote only to break a tie, not a regular extra vote.
• MPC must meet at least four times a year; in practice it meets roughly six times (bi-monthly).
• India's inflation target under flexible inflation targeting is 4% CPI, with a 2% band (2-6%).
• If inflation stays outside the band for three consecutive quarters, RBI must report to the government.
• CRR, SLR, and OMO are quantity-based liquidity tools; repo, reverse repo, and MSF are price-based tools.
• A repo rate hike aims to cool inflation by raising the cost of borrowing across the economy.
• A repo rate cut aims to boost growth by making borrowing cheaper.
• RBI ran a rate-hiking cycle through 2022-2023 responding to a global inflation surge.
• CRR changes affect liquidity directly by locking or freeing bank cash reserves.
• SLR serves both a prudential safety role and helps fund government borrowing.

Memory Tables

Table 1: The RBI Rate Corridor

Tool	Direction of Money Flow	Effect When Raised	Effect When Cut
Repo Rate	RBI lends to banks (short-term, collateralized)	Contracts liquidity, cools inflation	Expands liquidity, boosts growth
Reverse Repo / SDF	RBI borrows from banks	Absorbs liquidity	Releases liquidity
MSF	RBI lends to banks (emergency, above repo)	Discourages emergency borrowing further	Makes emergency borrowing relatively cheaper
Bank Rate	RBI lends to banks (long-term, no collateral)	Aligned with MSF; signals tighter credit	Aligned with MSF; signals easier credit

Table 2: CRR vs SLR at a Glance

Feature	CRR	SLR
Held as	Cash only	Cash, gold, or approved G-Secs
Held with	RBI	The bank itself
Interest earned	None	Yes (on securities held)
Primary purpose	Liquidity and monetary control	Liquidity control plus prudential safety and government funding
Governing base	Net Demand and Time Liabilities (NDTL)	Net Demand and Time Liabilities (NDTL)

Practice MCQs

Q1. What is the repo rate? (a) The rate at which banks lend to each other (b) The rate at which RBI lends short-term funds to banks against government securities (c) The rate at which RBI borrows from banks (d) The rate charged on personal loans

Q2. When RBI raises the repo rate, what is the expected effect on inflation over time? (a) Inflation rises further (b) Inflation is expected to ease (c) No effect on inflation (d) Inflation becomes negative immediately

Q3. Under RBI's standard Liquidity Adjustment Facility corridor, which rate is normally higher? (a) Reverse repo rate (b) Repo rate (c) Both are always equal (d) Bank Rate is always highest

Q4. Which liquidity absorption tool did RBI introduce in April 2022 as the effective floor of its rate corridor? (a) Marginal Standing Facility (b) Standing Deposit Facility (c) Market Stabilisation Scheme (d) Open Market Operations

Q5. Which statement correctly distinguishes CRR from SLR? (a) CRR is held by the bank, SLR is held with RBI (b) CRR is held with RBI as cash and earns no interest, SLR is held by the bank and can earn interest (c) Both are held with RBI and earn interest (d) CRR applies only to foreign banks

Q6. What was the primary purpose behind RBI introducing the Marginal Standing Facility in May 2011? (a) To provide banks a cheap regular funding source (b) To let banks borrow overnight in emergencies at a rate above repo (c) To replace the repo rate entirely (d) To fund government infrastructure projects

Q7. When RBI conducts an Open Market Operation purchase of government securities, what is the effect on liquidity? (a) Liquidity is absorbed (b) Liquidity is injected (c) No change in liquidity (d) Only affects foreign exchange reserves

Q8. How many members does India's Monetary Policy Committee have? (a) 4 (b) 5 (c) 6 (d) 8

Q9. Under what legal framework was the Monetary Policy Committee constituted? (a) Banking Regulation Act, 1949 (b) Finance Act, 2016 amendment to the RBI Act, 1934 (c) Companies Act, 2013 (d) FRBM Act, 2003

Q10. When can the RBI Governor use a casting vote in an MPC meeting? (a) In every meeting regardless of outcome (b) Only to break a tie among MPC members (c) Never, the Governor has no special vote (d) Only during an emergency session

Q11. What is India's current CPI inflation target and tolerance band under the flexible inflation targeting framework? (a) 2%, plus or minus 1% (b) 4%, plus or minus 2% (c) 6%, plus or minus 2% (d) 5%, plus or minus 1%

Q12. If inflation remains outside the tolerance band for how many consecutive quarters must RBI report to the government? (a) One (b) Two (c) Three (d) Four

Q13. Which of the following is classified as a quantity-based (rather than price-based) monetary policy tool? (a) Repo rate (b) MSF (c) CRR (d) Reverse repo rate

Q14. Which committee/act framework laid the basis for RBI's Payment Bank-style differentiated licensing? (Applies conceptually here as a cross-check on regulatory bodies.) (a) Narasimham Committee (b) Nachiket Mor Committee (c) Chakravarty Committee (d) Tarapore Committee

Q15. A bank facing an acute, unexpected overnight liquidity shortage beyond its normal repo access would most likely borrow through which facility? (a) Reverse Repo (b) Open Market Operations (c) Marginal Standing Facility (d) Statutory Liquidity Ratio

Answer Key

Q	Answer	Reason
1	(b) RBI lends short-term funds to banks against government securities	This is the textbook definition and the core policy rate the MPC sets.
2	(b) Inflation is expected to ease	A repo hike raises borrowing costs, cooling demand, which is the intended inflation-control effect.
3	(b) Repo rate	The corridor is structured so borrowing from RBI (repo) costs more than parking with RBI (reverse repo/SDF) earns.
4	(b) Standing Deposit Facility	Introduced in April 2022, SDF absorbs liquidity without RBI needing to offer collateral securities.
5	(b) CRR held with RBI as cash, earns no interest; SLR held by the bank, can earn interest	This is the single most tested distinction between the two ratios.
6	(b) To let banks borrow overnight in emergencies at a rate above repo	MSF is deliberately priced above repo to function strictly as a last-resort window.
7	(b) Liquidity is injected	Buying securities means RBI pays out cash into the system, increasing money supply.
8	(c) 6	Three RBI members (including the Governor as Chair) plus three external members make up the MPC.
9	(b) Finance Act, 2016 amendment to the RBI Act, 1934	This amendment formally created the committee-based rate-setting mechanism.
10	(b) Only to break a tie among MPC members	Each of the six members has one equal vote; the Governor's casting vote applies only in a deadlock.
11	(b) 4%, plus or minus 2%	This gives RBI an effective operating band of 2% to 6% CPI inflation.
12	(c) Three	Three consecutive quarters outside the band triggers RBI's mandatory report to the government.
13	(c) CRR	CRR directly restricts the quantity of lendable funds, unlike the price-based repo, reverse repo, and MSF rates.
14	(b) Nachiket Mor Committee	This committee's financial inclusion recommendations shaped both Payment Banks and Small Finance Banks.
15	(c) Marginal Standing Facility	MSF exists precisely for acute, emergency, overnight liquidity needs beyond the regular repo window.