Dollar-Rupee Exchange Rate Mechanism
The Dollar-Rupee exchange rate operates under a managed float regime where market forces determine the rate within an implicit band, with the RBI intervening to prevent excessive volatility, using spot, forward, and swap markets to smooth exchange rate movements.
India formally shifted from a fixed exchange rate to a market-determined exchange rate system in March 1993, transitioning through an intermediate Liberalised Exchange Rate Management System (LERMS) before the unified floating rate became operational. Since then, India has maintained what the IMF classifies as a managed float — or in its de facto classification, often as a crawl-like arrangement — where the rupee's value is determined by supply and demand in the foreign exchange market, but the RBI actively intervenes to prevent sharp volatility.
The rupee's rate against the US Dollar is the most widely tracked pair, reflecting the dominance of dollar-denomination in India's trade invoicing, external debt, and commodity imports. The exchange rate is published daily by RBI's reference rate mechanism (based on the average of merchant and interbank quotes around noon), with the FBIL taking over benchmark administration from the FCRB in 2018.
RBI intervention takes multiple forms. Spot market purchases of dollars (rupee sales) prevent excessive appreciation during capital inflow surges; spot dollar sales (rupee purchases) contain excessive depreciation during outflows. Forward and swap market operations — where RBI buys or sells forward dollars — allow deferred settlement and are used to manage liquidity while influencing the forward premium or discount. Swap auctions (buy-sell and sell-buy USD-INR swaps) have been used to inject or drain rupee liquidity while simultaneously managing forward market pressure.
The exchange rate pass-through to inflation is a critical linkage in the RBI's monetary policy framework. A 10 per cent rupee depreciation raises import prices and thus wholesale and consumer inflation, with estimates of pass-through varying across studies and commodity compositions. Petroleum products, edible oils, and electronic imports are the most sensitive categories.
For equity investors, the exchange rate affects IT sector revenues (USD-denominated revenues translate better in a weaker rupee environment), import-intensive sectors (auto, electronics, aviation, oil marketing), and external debt-carrying companies whose interest and principal obligations inflate with rupee depreciation.