The Reserve Bank of India (RBI) is paying a heavy price to defend the rupee, with foreign exchange reserves having evaporated by $50 billion since early September. A notional $200 billion in negative dollar forward positions on its books, coupled with an additional $35 billion in forward dollar exposure within the banking system, is pushing this currency defense battle to a sustainability tipping point. According to Wallstreetcn.com, the RBI will open a special window starting October 12, 2026, to directly provide foreign exchange to three state-owned refiners, aiming to ease spot market dollar-buying pressure and reintroduce derivative controls, significantly compressing speculative dollar-buying space in the market. However, Goldman Sachs points out that the actual demand for dollars has not changed, merely shifted to being met by the central bank's reserves. Furthermore, the interest rate differential between Indian and US 10-year government bonds has plummeted from 600 basis points in 2013 to approximately 200 basis points, with the traditional interest rate buffer almost gone. The market is beginning to discuss rebuilding the spread advantage by raising the yield curve, but this move would push up domestic borrowing costs, further dragging on economic growth.