RBI swap protects banks on FCNR principal, but rupee risk remains

The RBI's swap facility for FCNR(B) deposits creates a bifurcated risk structure that transfers some currency exposure while leaving banks exposed to others. Under the arrangement, the central bank shields banks from exchange rate fluctuations on the principal amount of these deposits through the swap mechanism, providing a degree of certainty on the rupee equivalent of foreign currency liabilities.

However, the protection does not extend to interest payments on these deposits. Banks must manage dollar interest obligations independently, meaning they face direct currency risk if the rupee depreciates against the dollar. When the rupee weakens, the cost of servicing these dollar-denominated interest payments rises in rupee terms, potentially squeezing bank margins unless they have hedged these exposures separately.

This asymmetric risk allocation reflects the mechanics of the RBI swap structure. The central bank essentially takes on the principal currency risk to manage systemic stability and rupee volatility, while banks retain operational responsibility for interest rate management. Lenders must actively monitor their exposure on the interest component and deploy hedging strategies if they wish to insulate themselves from adverse currency movements.

The distinction underscores the importance of careful treasury management for banks holding FCNR(B) deposits. While the RBI swap provides a safety net for the bulk of foreign currency exposure, banks cannot assume complete protection and must maintain robust systems to manage residual currency risks on interest payments.