RBI Caps Bank FX Positions at $100M to Curb Arbitrage
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- Reserve Bank of India announced two rounds of measures to support the rupee: capping banks' net open rupee position at $100 million (down from a prior 25%-of-capital rule) and barring banks from offering rupee non-deliverable forwards to resident and non-resident clients.
- The moves followed a nearly 4% rupee depreciation in March, on top of roughly 4% in the prior 12 months, with a 'rupee basis trade' — arbitraging gaps between onshore forward rates and the NDF market — amplifying the decline.
- Banks had built up an estimated $30-40 billion in positions across state-run, private and foreign lenders, with a significant chunk of activity occurring since the Iran war broke out.
- The measures stop short of capital controls — no new restriction on withdrawing capital from India — but explicitly make it harder for banks and corporates to place large speculative currency wagers while still allowing hedging of genuine exposures.
- Banks face potential losses as they rush to unwind arbitrage positions, and overseas investors saw a sharp rise in hedging costs after being cut off from the NDF channel.
- Unwinding is expected to spark heavy dollar sales onshore, supporting the rupee, but the rules risk creating a disconnect between the onshore and NDF markets and denting the RBI's prior efforts to integrate the two.
Why it matters: The RBI is forcing banks to unwind an estimated $30-40 billion in speculative positions, with the unwinding itself expected to trigger heavy onshore dollar sales that lift the rupee in the short term — but banks absorb losses on the rush to close trades, overseas investors pay sharply higher hedging costs, and the central bank's longer-term goal of integrating the onshore and NDF markets takes a step back.
