Banking system liquidity

Also called: Systemic liquidity, Liquidity surplus, Liquidity deficit · Topic: Banking, Credit Creation and Monetary Policy · NCERT: Beyond NCERT

Meaning

Banking system liquidity is the amount of ready cash that banks as a group have, beyond what they must keep. It is measured by the net LAF position, which is the money the RBI absorbs from banks minus the money it lends to them.

• Net LAF position = Funds absorbed by RBI (SDF + reverse repo/VRRR) − Funds injected by RBI (repo/VRR + MSF)
• Positive result → liquidity surplus
• Negative result → liquidity deficit

It matters because the RBI's rate decision affects the economy only if market rates follow it. A surplus pulls overnight rates down toward the corridor floor, and a deficit pushes them up toward the ceiling. So the RBI must manage liquidity to keep its operating target, the WACR, close to the repo rate [1].

Explanation

How liquidity is measured and managed

• Liquidity Adjustment Facility (LAF): the RBI's system of repo, reverse repo and standing facilities, used to manage day-to-day liquidity [1]. It started in June 2000, after the Narasimham Committee II.
• Injecting cash (when there is a deficit):
• Repo / Variable Rate Repo (VRR): a bank sells government securities to the RBI and agrees to buy them back later. The bank gets cash now.

• Marginal Standing Facility (MSF): an overnight emergency window at a penal rate, meaning a rate above repo.

• Absorbing cash (when there is a surplus):

• Standing Deposit Facility (SDF): banks park spare cash with the RBI without collateral (no bonds need to be pledged) [2][1].

• Variable Rate Reverse Repo (VRRR): an auction in which banks bid to park surplus funds with the RBI.

• Main operation today: the 7-day VRR/VRRR auction handles transient liquidity, meaning short-lived shortages or surpluses. The RBI can also run operations from overnight to 14 days when it chooses [1].

Surplus, deficit and the corridor

The policy rate corridor is the band within which overnight rates move. Rates set in the 5 December 2025 policy [3]:

Floor	Policy rate	Ceiling
SDF 5.00%	Repo 5.25%	MSF = Bank Rate 5.50%

• Surplus → WACR falls toward SDF (5.00%)
• Banks have spare cash but few borrowers.
• Call money rates (rates on one-day loans between banks) drop below repo.

• The RBI runs a VRRR to absorb the extra cash and lift WACR back toward repo [1].

• Deficit → WACR rises toward MSF (5.50%)

• Banks are short of cash and compete to borrow.
• Call rates rise above repo.
• The RBI runs a VRR to add cash and bring WACR back down.

Worked example (hypothetical amounts)

• In one week, banks park ₹1,50,000 crore with the RBI through SDF and VRRR.
• In the same week, they borrow ₹50,000 crore through repo and MSF.
• Net LAF = 1,50,000 − 50,000 = +₹1,00,000 crore, so the system is in surplus.
• Expect WACR below 5.25%, moving toward 5.00%. The RBI would respond with a VRRR.
• If WACR comes back to about 5.26%, as in the study note's WACR example, the operating target is being met.

What makes liquidity rise or fall

Autonomous drivers change liquidity without any RBI decision:

• Currency demand: during festivals and elections, people withdraw cash from banks, so liquidity falls.
• Government cash balances:
• On tax dates, such as advance-tax dates, money moves from bank accounts to the government's account with the RBI, so liquidity is drained.

• When the government spends, money flows back to banks, so liquidity is added.

• RBI forex intervention:

• When the RBI sells dollars to support the rupee, banks pay rupees to the RBI, so liquidity is drained.
• When the RBI buys dollars, it pays out rupees, so liquidity is added.

Transient vs durable liquidity:

• Transient (short-lived) imbalances are handled by the 7-day and fine-tuning VRR/VRRR [1].
• Durable (long-lasting) imbalances need other tools: open market operations (OMOs), which are outright purchases or sales of government bonds, and changes in the CRR.

In India

• Who manages it: the Reserve Bank of India. It aims to keep the WACR (operating target) aligned with the policy repo rate through proactive liquidity management [1].
• Legal basis of the SDF: Section 17(2A) of the RBI Act, 1934, inserted by the Finance Act 2018. The SDF was introduced in April 2022 and replaced the fixed-rate reverse repo (3.35% at the time) as the corridor floor. The fixed-rate reverse repo is now used only at the RBI's discretion [1].
• Why the SDF matters for surpluses: under a reverse repo, the RBI must give banks government bonds as collateral. When surpluses are very large, it can run short of bonds. The SDF needs no collateral, so this limit disappears.
• MSF (introduced May 2011): rate = repo + 25 bps. Banks can dip into their SLR securities up to 2% of NDTL to borrow under it [1]. (SLR is the minimum share of deposits a bank must hold in safe assets like government bonds. NDTL is roughly a bank's deposits and similar liabilities.)
• Past framework: under the framework announced on 6 February 2020, the main operation was the 14-day VRR/VRRR, timed to the fortnightly CRR maintenance cycle [4][2]. For example, a 14-day VRRR on 15 January 2021 absorbed a notified amount of ₹2,00,000 crore [4].
• Latest rates (December 2025): repo 5.25%, SDF 5.00%, MSF and Bank Rate 5.50%, neutral stance [3]. (Check the current rates before the exam.)

Don't confuse with

• Repo rate vs WACR: the repo rate is the policy rate the RBI announces. The WACR is the operating target, the actual market rate that liquidity management tries to keep close to repo [1].
• SDF vs reverse repo: both absorb surplus cash. The SDF is collateral-free and is the corridor floor. The reverse repo needs government bonds as collateral and is no longer the floor [1].
• Transient vs durable liquidity: transient imbalances are fixed with 7-day or fine-tuning VRR/VRRR. Durable imbalances need OMOs or CRR changes.
• Liquidity surplus vs deficit (sign trap): a surplus means banks are parking net funds with the RBI (absorption > injection). A deficit means banks are borrowing net funds from the RBI. A surplus pulls rates down, and a deficit pushes them up.

Prelims Hooks

• Banking system liquidity is measured by the net LAF position (RBI absorption minus RBI injection).
• Surplus → WACR moves toward SDF (floor, repo − 25 bps). Deficit → WACR moves toward MSF (ceiling, repo + 25 bps) [1]. Corridor width = 50 bps.
• RBI selling dollars drains rupee liquidity. Advance-tax payments drain it. Government spending adds to it.
• Current main liquidity operation = 7-day VRR/VRRR [1]. Under the Feb 2020 framework it was the 14-day VRR/VRRR, timed to the CRR cycle [2][4].
• SDF (April 2022) is collateral-free, under s.17(2A) of the RBI Act, inserted by the Finance Act 2018. That is why it can absorb very large surpluses.
• Trap: VRRR absorbs liquidity and VRR injects it. The LAF began in June 2000, after the Narasimham Committee II.

Mains Points

• Transmission depends on liquidity:
• A repo cut helps borrowers only if WACR and other market rates follow it.
• In a deficit, WACR stays near MSF, so the rate cut does not reach borrowers.

• So liquidity management (VRR/VRRR, OMOs, CRR) matters as much as the rate decision itself [1].

• Currency defence vs domestic liquidity (GS-III):

• When the RBI sells dollars to support the rupee, rupee liquidity is drained and WACR rises toward MSF.
• Credit may tighten just when the RBI wants easier money.

• The RBI must offset the drain with VRR or OMO purchases, which links external-sector management with monetary policy.

• SDF as an institutional reform:

• A collateral-free floor lets the RBI absorb large surpluses, for example after heavy dollar buying or big government spending, without running out of bonds.
• This makes the corridor more reliable. It is a good example of a legal change (Finance Act 2018) making a monetary-policy tool possible.

Related concepts

• Liquidity Adjustment Facility
• Variable Rate Repo
• Variable Rate Reverse Repo
• Marginal Standing Facility
• Standing Deposit Facility
• Policy rate corridor
• Weighted Average Call Rate

Read more

• The operating framework: LAF, the corridor and WACR