Explainer: Why India's central bank is clamping down on FX arbitrage https://www.reuters.com/world/india/why-indias-central-bank-is-clamping-down-fx-arbitrage-2026-04-02/?taid=69ce64d572732b0001380598 https://www.reuters.com/world/india/why-indias-central-bank-is-clamping-down-fx-arbitrage-2026-04-02/?taid=69ce64d572732b0001380598