RBI defends rupee with decisive market action, sparking its biggest gain in four years

The Reserve Bank of India has mounted its strongest currency defence in over a decade, driving the rupee toward a 1.9% rise this week — its largest weekly gain in four years.

The swift intervention reflects the central bank's commitment to macroeconomic stability amid global volatility, shielding the currency from speculative pressure. That stability, however, has triggered short-term adjustments across domestic financial markets, pushing hedging costs higher and squeezing liquidity in foreign exchange derivatives.

Stricter rules rein in speculative pressure

To curb aggressive currency speculation and stabilise exchange rate movements, the central bank introduced stringent reserve requirements over the weekend. Lenders must now set aside 20% of the rupee equivalent for foreign exchange derivative transactions exceeding $2 million.

The measure immediately curbed volatile swings in the spot market, but it also increased the cost of forward contracts used by corporate treasuries to insure against future dollar payments. Onshore three-month dollar-rupee forward yields climbed to 6.54% on Thursday, reaching their highest closing level since May 2016.

Market participants noted that the abrupt shift temporarily disrupted standard hedging channels.

Central bank steps in to clarify scope

As trading volumes slowed and corporate treasuries reassessed their forward exposure, the RBI moved quickly on Thursday to provide clarity. The central bank clarified that the new reserve requirements apply specifically to transactions intended for foreign exchange hedging, rather than the regular market-making trades banks conduct to facilitate client transactions and maintain liquidity.

The clarification was welcomed by market participants who had voiced concern over short-term dislocation. Anshul Chandak, head of treasury at RBL Bank in Mumbai, described the elevated hedging expenses as a transient trade-off, noting that markets "will have to swallow poison for a long-term gain."

Foreign exchange advisory firms observed that the rapid surge in forward premiums briefly inverted typical borrowing costs, making it cheaper for some firms to borrow rupees and swap them into dollars than to access direct dollar credit.

Sovereign resilience and investor appetite

Government bond yields have also traded near their highest levels in three years, reflecting global crude oil prices and global portfolio flows. Even so, international long-term institutional investors continue to view India's underlying macro fundamentals with confidence.

Shamaila Khan, head of global emerging markets and Asia-Pacific fixed income at UBS Asset Management, confirmed that the regulatory steps have not altered the firm’s strategic view of India or its capital allocations to the country. Maintaining an open, predictable framework remains the primary focus for foreign capital.

With commercial banks heading into the final quarter of the financial year, trading desks expect foreign exchange activity to gradually realign around the updated framework. By acting decisively to suppress volatile currency moves, the RBI has prioritised durable domestic stability over speculative trading ease.