The RBI’s defensive strategy is built on several distinct technical pillars. Each serves a specific tactical purpose within the broader macroeconomic framework.
Foreign Currency Assets (FCA) and Spot Intervention
The Sterilised Intervention Process
The RBI is always active in the spot market to make sure supply-demand imbalances do not go out of hand. When the rupee faces sudden selling pressure, the RBI sells USD from its reserves and absorbs INR. The supply of the rupee is thus slashed and the supply of the dollar increases, arresting the depreciation. Conversely, during periods of heavy inflows, the RBI buys USD to build its war chest and prevent excessive appreciation. According to news reports, as of March 2026, India’s foreign exchange reserve adequacy is robust enough to cover approximately 10 to 11 months of projected imports. Seasoned analysts are of the opinion that the reserve level is substantially higher than the safety margin maintained during the Taper Tantrum in 2013, when forex reserves had fallen to cover less than seven months of imports.
Sterilised Intervention, a critical technical mechanism, is a process whereby the RBI supports the rupee by buying dollars. It injects rupees into the domestic banking system. The excess liquidity can fuel inflation or asset bubbles. To stop this from happening, the RBI uses the Market Stabilisation Scheme (MSS), a monetary policy tool to manage excess liquidity in the financial system. It sells short-dated government securities, called MSS bonds, to withdraw surplus funds, control inflation, and manage capital inflows. It also simultaneously conducts Open Market Operations (OMOs). This literally sterilises the impact, and the currency management goals do not conflict with domestic monetary policy.
The Liquidity Adjustment Facility (LAF) and the Rupee Side
The Liquidity Adjustment Facility (LAF) is the RBI’s primary tool to manage daily liquidity in the banking system, consisting of Repo and Reverse Repo/SDF operations. The LAF plays a crucial role in currency protection by maintaining the ‘short-end’ of the yield curve. When the rupee is under pressure, the RBI may tighten liquidity via the LAF corridor. This can push up the overnight call money rate. A higher call rate makes it expensive for speculators to short the rupee by borrowing INR to buy USD.
The Forward Market Buffer: The Invisible Shield
The RBI’s net forward position allows it to commit to delivering or receiving dollars at a future date without impacting current spot liquidity. For instance, if the RBI expects a large corporate outflow in 6 months, it can sell dollars in the forward market today. This signals to the market that liquidity will be available, preventing a pre-emptive run on the currency. The forward book serves as a second line of defence that often does not appear in the headline spot reserve numbers.
FCNR-B and Special Swap Windows
The FCNR-B template has always been a potent tool in the toolkit. Historically, as seen in 2013, to address a rapid depreciation of the rupee and a severe shortage of foreign exchange reserves, the RBI allowed banks to raise fresh dollar deposits from non-resident Indians (NRIs) with a minimum maturity of 3 years. To eliminate the exchange risk for banks, the RBI offered a swap facility at a concessional rate of 3.5% per annum. At the time, the prevailing market cost for hedging was around 6-7% per annum. This subsidised rate allowed banks to offer attractive interest rates to NRIs, bringing in a massive inflow of $26 billion through FCNR deposits and an additional $8 billion through foreign currency borrowings, totaling over $34 billion. While such windows are not always open, their readiness acts as a powerful deterrent. It signals to the global market that the RBI is prepared to incentivise dollar inflows through the banking channel if the situation demands it.