Instruments of Monetary Policy: Quantitative Tools

1. Quantitative vs Qualitative Tools

2. Reserve Ratios (Direct Instruments)

• It is the proportion of a bank's total NDTL that it must keep as cash deposits solely with the RBI.
• Key features: Banks do not earn any interest on the CRR balance kept with RBI. There is no minimum or maximum limit for CRR strictly mandated by the RBI Act anymore (it is decided by RBI based on monetary conditions).
• Impact: If RBI raises CRR to 4.5%, banks have to park more money with RBI. This drains liquidity from the banking system, reducing banks' capacity to lend, thus controlling inflation.

• It is the proportion of a bank's total NDTL that it must maintain with itself (not RBI) in the form of liquid assets — cash, gold, or approved government securities (G-Secs).
• Impact: While CRR is kept as non-interest-bearing cash, SLR is mostly kept as government bonds, which earn interest for the bank while creating a captive market for government borrowing. If SLR is increased, banks have less money to lend to the private sector.

3. Liquidity Adjustment Facility (LAF) - Indirect Instruments

• Definition: It is the fixed interest rate at which the RBI provides overnight/short-term liquidity to banks against the collateral of government and other approved securities.
• Mechanism: A bank sells existing government bonds to RBI with an agreement to "repurchase" them on a specific future date at a predetermined price (which includes the interest — the Repo rate).
• Important Note: For Repo borrowing, banks cannot use the securities they have kept aside to maintain their mandatory SLR quota. They need excess government bonds to borrow under Repo.
• Impact: When RBI lowers the Repo Rate, borrowing becomes cheaper for banks, which they pass on to consumers by lowering loan EMIs, boosting demand (Expansionary). Increasing the Repo rate makes borrowing expensive, curbing inflation (Contractionary).

• Reverse Repo: The interest rate at which banks lend their surplus funds to RBI against collateral.
• SDF (Introduced in 2022): It is a facility where RBI absorbs liquidity (takes surplus cash from banks) without offering any collateral (Government securities) in return. It replaced the fixed Reverse Repo as the floor of the LAF corridor.
• Impact: A higher SDF/Reverse Repo encourages banks to park their excess cash with RBI for safe returns rather than lending it to the public, thus reducing money supply.

4. Marginal Standing Facility (MSF) and Bank Rate

• Introduced in 2011, MSF is a penal rate at which banks can borrow overnight funds from RBI in emergency situations entirely beyond their LAF window.
• Key Difference from Repo: Under MSF, banks are allowed to dip into their statutory SLR quota (up to a certain limit, usually 2% of NDTL) to pledge securities against the loan.
• Because it is an emergency facility, the MSF rate is always set higher than the Repo rate (usually Repo + 0.25%).

• Historically, it was the standard rate at which RBI bought or discounted bills of exchange or other commercial paper.
• Unlike Repo, borrowing under Bank Rate does not require collateral.
• Today, it is primarily used as a penal rate charged on banks for falling short of their CRR/SLR requirements. By policy, the Bank Rate is synced to be equal to the MSF rate.

5. Open Market Operations (OMO)

• Selling Securities: When RBI sells bonds to banks/public, it sucks money out of the system (absorbs liquidity) → Reduces money supply (Anti-inflationary).
• Buying Securities: When RBI buys back bonds from the market, it pays cash into the system (injects liquidity) → Increases money supply (Expansionary).
• Operation Twist: A specialized OMO where RBI simultaneously purchases long-term G-Secs and sells short-term G-Secs to bring down long-term interest rates without expanding the total central bank balance sheet.