Rupee's valuation sinks to over-a-decade low, bruised by Iran war, portfolio outflows

The Indian rupee's Real Effective Exchange Rate (REER) based on a 40-currency basket fell to 92.72 — significantly below its long-run average of 98.25 — mark...

What Happened

The Indian rupee's Real Effective Exchange Rate (REER) based on a 40-currency basket fell to 92.72 — significantly below its long-run average of 98.25 — marking the deepest undervaluation in over a decade.
The rupee's REER declined from 102.34 in February 2025 to 94.05 in February 2026, representing one of the sharpest real depreciation episodes in recent years.
The currency hit a record nominal low of approximately ₹95.21 per US dollar in late March 2026.
Foreign investors withdrew nearly $12 billion from Indian equity markets in March 2026 alone, with cumulative outflows approaching the prior year's record annual exit of $18.79 billion.
Analysts note that despite the significant undervaluation, near-term recovery prospects are limited due to persistent dollar demand, geopolitical uncertainty from the West Asia conflict, and structural outflow pressures.

Static Topic Bridges

Real Effective Exchange Rate (REER) — Concept and Significance

The Nominal Effective Exchange Rate (NEER) is the trade-weighted average of bilateral nominal exchange rates of a currency against a basket of trading partner currencies. The Real Effective Exchange Rate (REER) adjusts the NEER by factoring in relative price levels (inflation differentials) between India and its trading partners. When REER falls below 100 (the base), the rupee is considered undervalued in real terms, meaning Indian exports become more competitive but imports become costlier. The Reserve Bank of India publishes REER indices using a 40-currency basket (which accounts for nearly 88% of India's trade) and a 6-currency basket, with 2015-16 as the base year.

RBI uses the Consumer Price Index (CPI) as the deflator for constructing REER.
Base year for RBI's REER/NEER indices: 2015-16 = 100.
The 40-currency basket was expanded from 36 to 40 currencies, covering approximately 88% of India's trade.
A REER below 100 indicates real undervaluation; a REER above 100 indicates real overvaluation.
REER is a key indicator of external competitiveness — used by the RBI, IMF, and economists to assess whether a currency is fairly valued.

Connection to this news: The rupee's 40-currency REER at 92.72 — well below its long-run average of 98.25 — indicates the rupee is deeply undervalued relative to historical norms, even after accounting for India's inflation differential with trading partners.

Capital Account and Portfolio Flows — Balance of Payments Framework

India's external sector is captured in the Balance of Payments (BoP) framework, which has two main accounts: the Current Account (trade in goods and services, remittances, income) and the Capital/Financial Account (foreign investment, loans, external borrowings). Foreign Portfolio Investment (FPI) refers to investments by foreign entities in Indian stocks, bonds, and other financial instruments. Unlike Foreign Direct Investment (FDI), FPI is "hot money" — highly liquid and sensitive to global risk sentiment, interest rate differentials, and currency expectations. Large FPI outflows create selling pressure on the rupee as foreign investors convert rupees back to dollars.

FPI outflows are recorded under the Capital/Financial Account of the BoP.
The RBI can intervene in forex markets by selling dollars (from its foreign exchange reserves) to arrest sharp rupee depreciation.
India's foreign exchange reserves — as of early 2026 — provided a buffer but RBI intervention involves trade-offs between reserve adequacy and currency defence.
The Impossible Trinity (Mundell-Fleming Trilemma): a country cannot simultaneously have a fixed exchange rate, free capital flows, and an independent monetary policy — India operates a managed float regime.

Connection to this news: The $12 billion FPI outflow in March 2026 alone illustrates the vulnerability of the rupee to sentiment-driven capital flight, especially when domestic macroeconomic conditions coincide with global geopolitical shocks.

Exchange Rate Management — RBI's Managed Float

India follows a managed floating exchange rate regime, where the rupee's value is primarily determined by market forces (supply and demand) but the RBI intervenes periodically to prevent excessive volatility. This is distinct from a fixed peg (like the Gulf countries) or a freely floating currency (like the US dollar). The RBI's Exchange Rate Policy operates under Section 45W of the Reserve Bank of India Act, 1934, and does not target a specific exchange rate level but aims to ensure orderly market conditions.

India shifted from a fixed exchange rate to a managed float after the 1991 BoP crisis.
Key tools of intervention: spot market purchases/sales, forward market operations, and forex swap agreements.
A weak rupee raises the cost of oil imports (India imports ~85% of its crude oil needs), widens the Current Account Deficit, and can fuel imported inflation.
The RBI assumed a dollar-rupee exchange rate of approximately ₹94 in its official forecasts for FY 2026-27.

Connection to this news: The rupee's record low raises the dilemma of how aggressively the RBI should defend the currency versus allowing depreciation to run its course — a classic managed float policy challenge with direct implications for inflation and import bills.

Key Facts & Data

Rupee's 40-currency REER: 92.72 (vs. long-run average of 98.25).
REER fell from 102.34 (February 2025) to 94.05 (February 2026) — approximately 8 points in one year.
Nominal rupee hit a record low of approximately ₹95.21 per US dollar in late March 2026.
FPI outflows: ~$12 billion from Indian equities in March 2026 alone.
Cumulative outflows neared the prior year's record annual exit of $18.79 billion.
RBI's official FY 2026-27 forecast assumes a dollar-rupee rate of approximately ₹94.
India imports approximately 85% of its crude oil requirements — making rupee depreciation directly inflationary via fuel prices.
The RBI's REER index uses 2015-16 as base year (= 100) with CPI as deflator.