Examine the causes and consequences of surplus liquidity in the Indian banking system in 2026. What risks does excess liquidity pose to monetary policy transmission?

Surplus liquidity means bank reserves persistently exceeding requirements. In 2026 the glut reached record levels, forcing the RBI to notify a ₹7 lakh crore three-day Variable Rate Reverse Repo (VRRR) auction on 4 September alone [1] — a scale that makes liquidity management, not the policy rate, the live issue.

Causes

• External inflows: heavy mobilisation of special FCNR(B) deposits by banks, with the resulting dollars swapped with the RBI, released large rupee liquidity — a direct external-sector-to-money-market channel.
• Durable injections from the earlier easing cycle (OMO purchases, CRR relief) whose effects persisted after conditions turned surplus.
• Frictional factors: heavy government spending and slower credit offtake relative to deposit accretion.

Consequences

• Overnight rates drift to the lower end of the LAF corridor, whose floor is the Standing Deposit Facility [4].
• Banks prefer parking with the RBI over lending; longer-tenor VRRR auctions drew tepid bids as banks held cash for GST and advance-tax outflows, showing absorption depends on bank willingness.
• Softer bond yields and cheaper funding, but risk of credit misallocation and inflation if unaddressed.
• The RBI was pushed beyond tactical tools to durable absorption — OMO sales of ₹1,00,000 crore in three tranches in September 2026 [2].

Risks to transmission

• The WACR is the operating target of monetary policy [3]; excess liquidity drags it below the repo rate, and even below the SDF floor, so the MPC's signal stops guiding market pricing.
• Transmission turns asymmetric — deposit rates fall faster than lending rates, squeezing savers without proportionate borrower gains.
• Overnight VRRR absorbs the flow, not the stock: the same rupee returns next morning, creating an illusion of control.

The 2026 episode shows liquidity management is now the frontline of monetary policy. The revised framework's shift to mainly 7-day operations with advance notice [3], combined with durable OMO sales [2], offers the calibrated mix needed to keep the WACR anchored to the repo rate — preserving the credibility of flexible inflation targeting.