Thermodynamic Automaton Computer
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Founder, TWIST POOL Labs · TAC Research · NanoCERN Unit, Pune
First-principles finance educator · 10+ years in Indian capital markets
ORCID: 0009-0003-1953-7932The rupee fell from ₹65/$ in 2016 to ₹84/$ in 2024 — a 23% depreciation over 8 years. This slow, consistent devaluation affects everything from your import bills to the profitability of Indian IT companies to the returns on your equity portfolio. Understanding the exchange rate i…
The rupee fell from ₹65/$ in 2016 to ₹84/$ in 2024 — a 23% depreciation over 8 years. This slow, consistent devaluation affects everything from your import bills to the profitability of Indian IT companies to the returns on your equity portfolio. Understanding the exchange rate is not optional for any Indian investor.
1. What Determines the Rupee-Dollar Rate?
Supply and demand for USD in India:
- Demand for USD: Importers (crude oil, electronics, machinery), outward capital flows, FII repatriations
- Supply of USD: Exports (IT services, goods exporters), FII inflows, remittances from NRIs, RBI & Interest Rates Explained‘s forex reserves
Key drivers:
- India’s current account deficit (CAD): Wider deficit → more USD demand → rupee weakens
- FII flows: Large outflows → rupee falls
- Crude oil prices: India imports $150–200 billion of crude/year; high crude → high USD demand → rupee falls
- US Fed policy: Higher US rates → dollar strengthens globally → rupee weakens
- RBI intervention: RBI buys/sells USD from its $600+ billion reserve to manage excessive volatility
2. How Rupee Depreciation Affects Different Sectors
| Sector | Impact of Rupee Depreciation | Logic |
|---|---|---|
| IT Services (TCS, Infosys) | Positive | Revenue in USD; costs in INR → each dollar converts to more rupees |
| Pharma exports | Positive | Similar to IT — export revenue in USD |
| Textile exporters | Positive | Competitive advantage globally |
| Oil Marketing Companies (BPCL, HPCL) | Negative | Import crude in USD; sell in INR at regulated prices |
| Airlines (IndiGo, SpiceJet) | Negative | Aviation turbine fuel + aircraft leases in USD |
| Companies with USD debt | Negative | Debt repayment cost rises in INR terms |
| FMCG with imported ingredients | Moderately Negative | Raw material cost rise |
| Gold | Positive | International gold is priced in USD; weaker rupee = higher INR gold price |
3. The IT Sector and Rupee Sensitivity
India’s IT sector (TCS, Infosys, HCL Technologies, Wipro) earns 80–90% of revenue in USD. The rupee-dollar rate is a direct P&L variable.
The math: Infosys earns $18 billion in revenue. Every ₹1 depreciation of rupee against dollar adds approximately ₹1,800 crore to Infosys’s INR revenue (assuming margins unchanged).
This is why IT stocks often outperform during rupee weakness episodes — even when foreign investors are selling Indian equities and causing the rupee to weaken. The two effects partially cancel for IT investors.
4. RBI’s Role in Managing the Rupee
RBI’s stated policy is not to target a specific rupee-dollar level but to prevent excess volatility. RBI intervenes when:
- Rupee depreciation becomes disorderly (more than 0.5% per day)
- Speculation is driving excessive rupee weakness
How RBI intervenes:
- Sells USD from foreign reserves (reduces dollar supply pressure → supports rupee)
- Purchases USD when rupee is too strong (builds reserves)
- Uses interest rate policy (higher rates attract FII inflows → dollar supply → rupee support)
India’s forex reserves ($600+ billion) give RBI substantial intervention capacity — enough to fund 10+ months of imports.
5. The NRI Remittance Factor
India receives $80–100 billion/year in NRI remittances — the world’s largest recipient of remittances. NRIs send money from the US, UK, UAE, and other countries to support family expenses, invest in NRE accounts, or buy property.
When the rupee weakens, NRI remittances increase — each dollar converts to more rupees, encouraging NRIs to send more. This is a natural stabilising force: when rupee falls, NRI dollar supply increases, partially offsetting the weakness.
The Smart Friend’s Verdict
The rupee-dollar rate is a second variable every Indian investor must track alongside the Nifty. It determines IT sector earnings, input costs for import-dependent sectors, and the real return on your investment when adjusted for currency purchasing power.
Key heuristic: Rupee weakness = tilt toward IT and pharma exporters. Rupee strength = tilt toward consumption, energy importers, airlines. This sector rotation is one of the most consistent macro-based investment patterns in India.
Back to How Global Markets Affect India for the full international macro framework.
Frequently Asked Questions
See the full explanation in the section above.
India’s IT sector (TCS, Infosys, HCL Technologies, Wipro) earns 80–90% of revenue in USD. RBI’s stated policy is not to target a specific rupee-dollar level but to prevent excess volatility. India receives $80–100 billion/year in NRI remittances — the world’s largest recipient of remittances.
Sector
Impact of Rupee Depreciation
Logic
IT Services (TCS, Infosys)
Positive
Revenue in USD; cost