Long-Run Currency Depreciation and India: What the Rupee Really Tells Us About Economic Development.....

Introduction

The observation that a persistent long-term decline in a country's currency can reveal underlying economic weakness contains an important economic truth, but it needs qualification. A currency can depreciate for many reasons, and depreciation by itself is not proof of economic failure. What matters is why the currency is depreciating, whether domestic inflation is under control, whether productivity is rising, whether real wages are increasing, whether foreign capital is arriving, and what happens to the country's real effective exchange rate, or REER. For India, this distinction is especially important. The rupee has depreciated substantially against the US dollar over the past several decades, and particularly since 2014. Yet India has also experienced rapid real economic growth, rising foreign-exchange reserves, substantial foreign investment, expanding services exports, and considerable improvements in macroeconomic stability. Therefore, the rupee's decline against the dollar cannot simply be interpreted as evidence of structural decay. The more meaningful question is whether India's currency has depreciated faster than justified by India's relative inflation and productivity fundamentals. This is precisely where the REER becomes essential.

 

The Theory of Long-Run Exchange Rates

The simplest theory is purchasing power parity, or PPP. It suggests that, over a sufficiently long period, exchange rates should adjust to differences in inflation between countries. If India experiences higher inflation than the United States, the rupee should gradually depreciate against the dollar to preserve relative purchasing power.

 

This means that a country can experience a nominally weaker currency without suffering an equivalent loss of international competitiveness. Suppose Indian inflation averages 5 percent while US inflation averages 2 percent. Even if India's productivity is improving rapidly, some rupee depreciation against the dollar would be expected over time.

 

The second important theory is the Balassa-Samuelson effect. Developing countries that experience rapid productivity growth in tradable sectors may see wages rise across the economy. Higher wages increase the prices of non-tradable services, causing domestic inflation and a tendency toward nominal currency appreciation or, at least, slower depreciation in real terms. Thus, economic development can produce a complex relationship between productivity, wages, prices, and exchange rates.

 

The third concept is the REER. Unlike the bilateral rupee-dollar rate, the REER compares the rupee with a basket of currencies belonging to India's major trading partners and adjusts for relative price movements. A REER index above its base-period value generally indicates real appreciation, while a lower value indicates real depreciation, although interpretation depends on the index construction and base year.

 

Therefore, the REER is a much better indicator of India's underlying external competitiveness than simply saying that the rupee moved from around ₹60 per dollar in 2014 to the mid-₹80s or beyond in the following years. The bilateral dollar rate reflects not only India's economic conditions but also the strength of the dollar itself.

 

India's Historical Experience

India's exchange-rate history illustrates this distinction clearly. Before the 1991 balance-of-payments crisis, India operated under a much more controlled exchange-rate regime. The crisis forced major reforms, including devaluation and the eventual transition toward a market-determined exchange rate.

 

The rupee subsequently experienced several major episodes of depreciation. The Asian financial crisis, the global financial crisis, the 2013 "taper tantrum," the COVID-19 shock, and periodic global dollar strengthening all placed downward pressure on the currency.

 

Since 2014, the rupee has weakened considerably against the dollar. But this period has not been characterized by hyperinflation, monetary collapse, or a persistent balance-of-payments crisis. India's inflation-targeting framework, introduced in the mid-2010s, has strengthened the credibility of monetary policy. Foreign-exchange reserves have also risen dramatically compared with earlier decades, providing a substantial buffer against external shocks.

 

This is why interpreting the rupee solely through its dollar exchange rate can be misleading.

 

India's real economic transformation has also been significant. The World Bank's latest available data put India's nominal GDP at roughly $4 trillion in 2025, with real GDP growth of about 7.6 percent and GDP per capita of approximately $2,700. These figures demonstrate rapid economic expansion, although India's per-capita income remains far below that of advanced economies.

 

The REER and India's Current Position

The REER provides a more sophisticated picture. India's REER has at various times been above 100, indicating periods of real appreciation, and at other times moved closer to or below 100, depending on the RBI's selected basket, base year, and methodology.

 

The important point is that a REER near 100 does not automatically mean that the rupee is "correctly valued," nor does a REER below 100 automatically mean that the currency is fundamentally undervalued. The index is relative to a base period. It does not represent an absolute measure of fair value.

 

The broad Indian experience, however, suggests that the rupee's long-term nominal depreciation has been partly offset by India's relatively higher inflation. In other words, the rupee has lost substantial value against the dollar, but its real depreciation has been much smaller than the nominal depreciation might suggest.

 

This has an important policy implication. If India's REER is close to its historical benchmark or moderately undervalued, policymakers should not necessarily attempt to force the rupee upward. A competitive real exchange rate can support manufacturing, tourism, IT-enabled services, and merchandise exports. But an excessively undervalued REER can also raise the domestic cost of imported oil, machinery, technology, and intermediate goods.

 

India therefore needs an exchange rate that is competitive but not artificially weak.

 

The scope for further rupee depreciation should consequently be judged against productivity growth, inflation differentials, current-account sustainability, capital flows, and the REER—not merely against a psychological exchange-rate level such as ₹100 per dollar.

 

Strong Currency as a Sign of Development

The argument that a strong currency can represent economic strength is also broadly valid, but again requires nuance.

 

The US dollar, euro, and British pound are strong international currencies partly because the economies behind them possess high productivity, deep financial markets, strong institutions, technological capabilities, stable legal systems, and enormous global demand for their assets. Their currencies are also used as reserve and transaction currencies.

 

A strong currency allows households to purchase imported goods, energy, technology, education, and foreign assets more cheaply. It increases international purchasing power and can improve living standards.

 

But a strong currency is not always beneficial. If it becomes excessively strong relative to productivity, exporters may lose competitiveness, manufacturing can suffer, and current-account deficits may widen. Japan's experience during periods of substantial yen appreciation demonstrates this tension.

 

For India, the long-run objective should therefore not be an artificially "strong rupee." The real objective should be a steadily appreciating economic foundation that eventually supports a stronger rupee.

 

That foundation comes from higher productivity, rising real wages, better infrastructure, improved education and health, technological advancement, deeper capital markets, stronger institutions, and sustained foreign investment.

 

The Indian Paradox

India therefore presents an interesting paradox. The rupee has weakened significantly against the dollar, yet the Indian economy has grown rapidly. This means the currency's depreciation should not automatically be interpreted as evidence of economic collapse.

 

At the same time, the depreciation should not be dismissed as irrelevant.

 

A persistent decline in the rupee can become problematic if it reflects a combination of high inflation, weak productivity, inadequate export competitiveness, excessive dependence on imported energy, large fiscal deficits, capital outflows, or declining investor confidence.

 

India's oil dependence makes this especially important. When the rupee weakens, imported crude oil becomes more expensive in rupee terms. This can raise transportation costs, production costs, inflation, and the current-account deficit. Currency depreciation can therefore become self-reinforcing if it increases inflation and forces monetary policy to remain tighter for longer.

 

However, India also possesses important countervailing strengths. Its services exports, remittances, domestic savings, large internal market, digital economy, and growing manufacturing capabilities provide structural support to the balance of payments. The country is therefore fundamentally different from an economy experiencing uncontrolled currency collapse.

 

Precedents and International Examples

The historical experience of the dollar, pound, and euro also shows why currency strength should be understood in relative terms.

 

The US dollar remains exceptionally powerful because the United States combines high productivity with deep financial markets and the dollar's reserve-currency status. The British pound remains internationally important despite the UK's smaller economic size because of London's financial system and institutional depth. The euro represents the combined economic strength of a large group of advanced economies and functions as a major reserve currency.

 

These currencies are not strong simply because their governments "defend" them. Their strength ultimately reflects the economic capacity and credibility of the systems behind them.

 

For India, the lesson is clear. The rupee will become structurally stronger when India's productivity and per-capita incomes converge toward advanced economies. India's current GDP per capita remains only a small fraction of US levels, which means substantial room remains for productivity and income growth before the rupee can be expected to have the purchasing power associated with mature advanced economies.

 

Policy Remedies

Indian policymaking should therefore focus less on defending any particular nominal exchange-rate number and more on improving the fundamentals that determine the currency's long-run value.

 

The first priority should be price stability. The RBI's inflation-targeting framework should remain credible, because persistent inflation is ultimately one of the most important forces behind long-term currency depreciation.

 

The second priority should be productivity. India needs greater investment in education, health, skills, logistics, electricity, research, technology, and urban infrastructure. Productivity growth is the most sustainable route toward higher real wages and a stronger currency.

 

The third priority should be export competitiveness. India should move beyond reliance on a weak rupee as an export strategy. A genuinely competitive economy should be able to export because of quality, technology, scale, reliability, and productivity rather than simply because its currency is cheap.

 

The fourth priority should be reducing vulnerability to imported energy. Greater renewable energy, domestic energy production, electrification, and energy efficiency can reduce the external shock transmitted through oil prices and the exchange rate.

 

The fifth priority should be attracting stable long-term foreign investment rather than relying excessively on volatile portfolio flows. Foreign direct investment brings technology, management expertise, employment, and productive capacity.

 

Finally, India should allow the RBI to manage excessive exchange-rate volatility while avoiding an obsession with defending a particular rupee-dollar level. Intervention should smooth disorderly movements, not permanently resist economic fundamentals.

 

Conclusion

The original observation is therefore directionally correct but requires a crucial distinction. A currency that continuously depreciates because of uncontrolled inflation, falling productivity, fiscal instability, capital flight, and declining investor confidence is indeed a warning sign of structural economic weakness. But a currency that depreciates gradually because of inflation differentials, a strengthening dollar, productivity catch-up, and the normal adjustment of a rapidly growing developing economy tells a very different story. India's rupee should therefore be judged not simply by how many rupees are required to buy one dollar. The more meaningful indicators are India's REER, inflation relative to trading partners, productivity growth, real wages, export performance, current-account sustainability, foreign investment, and the quality of institutions. The ultimate goal of Indian economic policy should be to create conditions in which real wages rise faster, productivity increases, domestic incomes expand, foreign investment becomes deeper and more stable, and India's REER remains competitive without requiring perpetual nominal depreciation. In that sense, the strongest currency is not necessarily the one with the highest exchange-rate value today. The strongest currency is the one backed by an economy whose productivity, real wages, incomes, institutions, technology, and global competitiveness are continuously becoming stronger. If India achieves that transformation, a stronger rupee will eventually become not an artificial policy target, but a natural consequence of economic development.