Which of the following indicators is/are used to observe the monetary transmission mechanism in the economy? 1. Weighted average lending rate 2. Weighted average domestic term deposit rate 3. 1-year median MCLR 4. SDF rate Select the correct answer using the code given below. (a) 1 and 2 only (b) 1, 2 and 3 (c) 3 and 4 (d) 4 only

1. Basics of Monetary Policy and the RBI's Mandate (basic)

Monetary Policy is the process by which the central bank of a country—the Reserve Bank of India (RBI) in our case—manages the supply of money and the cost of credit (interest rates) to influence the economy. Think of it as the economy's thermostat: if the economy is "overheating" (high inflation), the RBI cools it down; if it's "chilly" (slow growth), the RBI tries to warm it up. Historically, the RBI had multiple objectives, but a landmark shift occurred in 2016 with an amendment to the RBI Act, 1934, which introduced a Flexible Inflation Targeting (FIT) framework Indian Economy, Nitin Singhania, Money and Banking, p.172.

Under this mandate, the primary objective of monetary policy is to maintain price stability while keeping in mind the objective of growth. Price stability is crucial because high inflation erodes the purchasing power of citizens and creates uncertainty for investors. To achieve this, the Government of India, in consultation with the RBI, set a specific target for inflation (measured by the Consumer Price Index): 4% with a tolerance band of +/- 2% (i.e., a range of 2% to 6%) Indian Economy, Nitin Singhania, Money and Banking, p.172. If inflation stays outside this range for three consecutive quarters, the RBI is legally required to explain to the government why it failed and what steps it will take to fix it.

Decisions regarding the benchmark interest rate (the Repo Rate) are not made by the Governor alone, but by a Monetary Policy Committee (MPC). This statutory body ensures a diversity of views and transparency in decision-making. The committee consists of six members: three from the RBI (including the Governor) and three external members appointed by the Government of India Indian Economy, Nitin Singhania, Money and Banking, p.173.

Sources: Indian Economy, Nitin Singhania, Money and Banking, p.172-173; Indian Economy, Nitin Singhania, Inflation, p.62

2. Policy Rates and the LAF Corridor (basic)

In our journey to understand how the Reserve Bank of India (RBI) controls the flow of money, the Liquidity Adjustment Facility (LAF) is perhaps the most important tool you will encounter. Think of the LAF as a steering wheel that the RBI uses to manage the daily volume of money (liquidity) in the banking system. It allows scheduled commercial banks to borrow money from the RBI when they are short on cash or park their extra funds with the RBI when they have a surplus Nitin Singhania, Money and Banking, p.166.

At the heart of this system is the Repo Rate (Repurchase Option). This is the benchmark interest rate at which the RBI lends short-term money to banks against government securities Nitin Singhania, Money and Banking, p.166. However, the RBI doesn't just set one rate; it creates a "corridor" to ensure market interest rates don't fluctuate too wildly. This LAF Corridor is bounded by two other rates: the Marginal Standing Facility (MSF) at the top and the Standing Deposit Facility (SDF) at the bottom Vivek Singh, Money and Banking- Part I, p.62.

Tool	Position in Corridor	Purpose
Marginal Standing Facility (MSF)	Upper End (Ceiling)	Emergency overnight borrowing for banks at a higher rate.
Repo Rate	Middle (Policy Rate)	Main rate used to signal the monetary policy stance.
Standing Deposit Facility (SDF)	Lower End (Floor)	Allows banks to park excess funds with RBI without needing collateral Vivek Singh, Money and Banking- Part I, p.61.

It is also useful to know that the Bank Rate, which used to be a primary tool, has now become "dormant" for daily operations. Today, it is aligned with the MSF rate and is primarily used to calculate penalties if banks fail to maintain their required reserves (like CRR or SLR) Vivek Singh, Money and Banking- Part I, p.62. By adjusting this corridor, the RBI ensures that the interest rates banks charge each other stay within a predictable range, which eventually influences the interest rates you see on your home loans or savings accounts.

Sources: Indian Economy, Nitin Singhania .(ed 2nd 2021-22), Chapter 7: Money and Banking, p.166; Indian Economy, Vivek Singh (7th ed. 2023-24), Chapter 2: Money and Banking- Part I, p.61-64

3. The Concept of Monetary Transmission (intermediate)

Monetary Transmission is the process through which a central bank’s policy actions (like changing the Repo Rate) ripple through the financial system to affect the real economy—influencing inflation, growth, and employment. Think of it as a relay race: the RBI hands the baton (interest rate change) to the banks, who then pass it to the businesses and households. For policy to be effective, this transmission must be fast and complete; if the RBI cuts rates but your home loan interest remains the same, the transmission is said to be "broken" or "clogged."

According to the framework, this transmission occurs in two distinct stages. In the first stage, changes in the policy rate are transmitted through the money market to other financial sectors, such as the bond market and the bank loan market Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.89. In the second stage, these shifts in financial markets influence the spending decisions of individuals and firms Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.90. For example, when interest rates rise, the price of bonds typically falls Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.46, and the cost of borrowing increases, which tends to cool down consumption and investment.

To monitor how well this "pass-through" is working, the RBI tracks several critical indicators. These aren't the tools themselves, but the thermometers used to measure the fever. Key indicators include:

• Weighted Average Lending Rate (WALR): This measures the actual cost of credit for borrowers on both fresh and existing loans.
• Weighted Average Domestic Term Deposit Rate (WADTDR): This tracks how policy changes affect the interest banks pay to depositors, which in turn influences the banks' cost of funds.
• MCLR (Marginal Cost of Funds-based Lending Rate): This is an internal benchmark banks use to price loans; a change in the median MCLR indicates how banks are adjusting their base pricing in response to RBI signals Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.91.

Sources: Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.89-91; Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.46

4. Reserve Ratios and Liquidity Management (intermediate)

At its core, liquidity management is about how the RBI controls the 'fuel' (money) available in the banking system to drive the economy. To prevent banks from lending out every single rupee they receive—which would be risky and could fuel hyperinflation—the RBI uses **Reserve Ratios**. These ratios act as a mandatory 'lock-up' of funds. The most fundamental of these is the **Cash Reserve Ratio (CRR)**. Under Section 42(1) of the RBI Act, 1934, banks must keep a certain percentage of their **Net Demand and Time Liabilities (NDTL)** as liquid cash with the RBI. This cash earns no interest, and its primary purpose is to control the money supply: when the RBI increases the CRR, banks have less money to lend, which helps cool down inflation Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.40.

While CRR is held with the RBI, the **Statutory Liquidity Ratio (SLR)** is maintained by the banks themselves. Regulated under the Banking Regulation Act, 1949, SLR requires banks to keep a portion of their NDTL in safe and liquid assets like **Gold, Cash, or Government Securities (G-Secs)**. Unlike CRR, the assets held under SLR (specifically G-Secs) allow banks to earn some interest income. In modern banking, the RBI has also harmonized SLR with international standards like the **Liquidity Coverage Ratio (LCR)**, allowing banks to use their SLR-eligible securities to meet global liquidity requirements Indian Economy, Nitin Singhania (ed 2nd 2021-22), Financial Market, p.236.

Occasionally, the RBI uses 'surgical' tools like the **Incremental CRR (I-CRR)**. This is a temporary measure to suck out a sudden surge of excess liquidity from the system, such as during the 2016 demonetization period or when high-value currency notes are withdrawn Indian Economy, Nitin Singhania (ed 2nd 2021-22), Money and Banking, p.168. By adjusting these ratios, the RBI directly influences the Credit Creation capacity of banks. If the RBI wants to boost economic growth, it decreases these ratios, leaving more 'loanable' funds with banks to encourage investment Indian Economy, Nitin Singhania (ed 2nd 2021-22), Money and Banking, p.169.

Feature	Cash Reserve Ratio (CRR)	Statutory Liquidity Ratio (SLR)
Held With	Reserve Bank of India (RBI)	The Bank itself
Form	Only Cash	Cash, Gold, and G-Secs
Returns	No interest earned	Interest earned on G-Secs
Act	RBI Act, 1934	Banking Regulation Act, 1949

Sources: Macroeconomics (NCERT class XII 2025 ed.), Money and Banking, p.40; Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.63; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Money and Banking, p.168-169; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Financial Market, p.236

5. Evolution of Bank Lending Benchmarks (exam-level)

Concept: Evolution of Bank Lending Benchmarks

6. Indicators to Observe Transmission Pass-through (exam-level)

When the Reserve Bank of India (RBI) changes the Repo Rate, it expects commercial banks to follow suit by adjusting their own lending and deposit rates. This process is called monetary policy transmission. However, transmission is rarely 100% or instantaneous. To understand how effectively policy changes are filtering down to the common man and businesses, the RBI monitors specific indicators that act as a pulse check for the banking system.

The most direct way to see if transmission is happening is by looking at Weighted Average Lending Rates (WALR). This is tracked for two categories: fresh loans (new loans sanctioned in a month) and outstanding loans (the total stock of existing loans). If the RBI cuts rates, we expect the WALR on fresh loans to drop quickly, while the rate on outstanding loans moves slower as old contracts take time to reset. Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.92. Similarly, the Weighted Average Domestic Term Deposit Rate (WADTDR) tells us how the returns for savers and the cost of funds for banks are changing. This is crucial because banks are often hesitant to lower lending rates if their cost of deposits remains high. Indian Economy, Vivek Singh (7th ed. 2023-24), Money and Banking- Part I, p.91.

Another vital indicator is the 1-year median Marginal Cost of Funds-based Lending Rate (MCLR). The MCLR represents the internal benchmark rate below which a bank cannot lend. By tracking the median MCLR across all banks, the RBI can see if banks are structurally lowering their base costs in response to policy shifts. It is important to distinguish these indicators from policy tools. For instance, while the Standing Deposit Facility (SDF) is a tool used to absorb liquidity and set the floor of the interest rate corridor, it is an instrument of policy, not an indicator used to measure how well the rest of the market has reacted. Indian Economy, Nitin Singhania (ed 2nd 2021-22), Money and Banking, p.169.

Indicator	What it measures	Significance for Transmission
WALR	Actual interest charged on loans.	Shows the end-impact on borrowers and credit demand.
WADTDR	Average interest paid on fixed deposits.	Reflects the bank's cost of sourcing money.
MCLR	Internal benchmark for pricing loans.	Shows if banks are updating their internal pricing logic.

Sources: Indian Economy, Vivek Singh (7th ed. 2023-24), Chapter 2: Money and Banking- Part I, p.89-92; Indian Economy, Nitin Singhania (ed 2nd 2021-22), Chapter 7: Money and Banking, p.169

7. Solving the Original PYQ (exam-level)

Now that you have mastered the fundamental concepts of the Repo rate and the Liquidity Adjustment Facility (LAF), this question tests your ability to distinguish between the tools the RBI uses and the indicators it monitors to gauge success. Monetary transmission is the 'relay race' of macroeconomics; it is the process through which the RBI's policy signals (like a Repo rate cut) travel through the banking system to eventually reach the end consumer. To observe if this relay is successful, the RBI tracks the actual 'pass-through' to the market. The Weighted Average Lending Rate (WALR) and the Weighted Average Domestic Term Deposit Rate (WADTDR) are the most direct indicators, as they reflect the actual interest rates borrowers pay and depositors receive, respectively.

To arrive at the correct answer, (B) 1, 2 and 3, you must also recognize the role of the 1-year median MCLR. As discussed in Indian Economy, Vivek Singh (7th ed. 2023-24), the MCLR serves as a critical internal benchmark for banks to price their loans. When the RBI changes policy rates, the shift in the median MCLR tells us how quickly and effectively banks are adjusting their internal pricing structures. By observing these three metrics, the RBI can determine if its monetary policy is 'sticky' or if it is flowing smoothly into the broader economy.

The common trap here—and a favorite tactic of the UPSC—is the inclusion of the SDF (Standing Deposit Facility) rate. While the SDF is a vital component of the modern monetary framework, it is a policy instrument (an input) used to absorb liquidity, rather than an indicator (an output) used to measure the transmission mechanism's effectiveness. In the exam hall, always ask yourself: 'Is this the lever being pulled, or is it the dial being watched?' The SDF is the lever, while the WALR, WADTDR, and MCLR are the dials that tell us if the machine is responding.