Currency Risk — How Exchange Rates Change Rupee Returns
Currency risk is the chance that exchange-rate moves change the rupee value of an overseas investment. This lesson shows how the market return and the currency move combine, why they multiply, and what the past record of the rupee does and does not tell.
What it is
An overseas investment is priced in a foreign currency, but a resident counts the result in rupees. Between the two stands the exchange rate. Currency risk is the chance that a move in that rate changes the rupee value of the investment, for better or worse.
It is present on every route abroad, including an Indian mutual fund scheme that invests overseas and is bought in rupees, because the scheme's rupee NAV reflects the exchange rate.
How the two parts combine
The rupee return is: (1 + return in foreign currency) × (1 + change in the rupee price of that currency) − 1. The change in the rupee price is the new rate divided by the old rate, minus 1; a move from ₹80 to ₹84 per dollar is 84 ÷ 80 − 1 = 5%.
The parts multiply because the new exchange rate applies to the whole foreign-currency value, including the gain or loss. A weaker rupee adds to the rupee return and a stronger rupee subtracts from it.
As a matter of arithmetic, a 25% gain in dollars is cancelled exactly if the dollar falls 20% against the rupee: 1.25 × 0.80 = 1.00.
It works in both directions
Currency moves can offset market moves or add to them. In 2022 the MSCI World Index fell 17.73% in US dollar terms over the calendar year. The rupee weakened that year too: on annual averages, the dollar cost about 6% more rupees in 2022 (₹78.58) than in 2021 (₹73.94). A weaker rupee cushions part of such a fall for a rupee investor. The two figures are not on the same basis, one being a calendar-year return and the other a change in yearly averages, so they cannot simply be combined into a single rupee return.
Cushioning is not assured. Had the rupee strengthened in a falling market, the rupee loss would have been larger than the dollar loss.
What the record shows
The US dollar averaged ₹45.00 in 2000, ₹44.00 in 2005, ₹67.16 in 2016, ₹73.94 in 2021, ₹78.58 in 2022 and ₹87.15 in 2025 (annual averages, US Federal Reserve). The rupee was slightly stronger in 2005 than in 2000, and weaker over the longer span.
The pace has been uneven. On annual averages, the dollar cost about 10% more rupees in 2021 than in 2016 (₹67.16 and ₹73.94), and about 6% more in 2022 than in 2021 (₹73.94 and ₹78.58). Past changes are not a rule, and no rate of change can be assumed for the future.
Rules at a glance
A cushion that cannot be counted on
Gauri, 46, a resident in Thane, holds an Indian fund-of-funds that invests in developed-market shares. In a year when those shares fall in dollar terms and the rupee also weakens, her loss in rupees is smaller than the loss in dollars.
That does not mean the currency will always soften a fall. In another year the rupee could strengthen while markets fall, and both effects would then work against her.
Four combinations of market and currency
- A resident invests USD 4,000 at ₹80 per dollar: 4,000 × 80 = ₹3,20,000. All prices and rates are assumptions for the example, not forecasts.
- Asset up 20% (USD 4,800), dollar up 10% (₹88): 4,800 × 88 = ₹4,22,400, a gain of ₹1,02,400, or 32%. Check: 1.20 × 1.10 − 1 = 0.32.
- Asset up 20% (USD 4,800), dollar down 10% (₹72): 4,800 × 72 = ₹3,45,600, a gain of ₹25,600, or 8%. Check: 1.20 × 0.90 − 1 = 0.08.
- Asset down 20% (USD 3,200), dollar up 10% (₹88): 3,200 × 88 = ₹2,81,600, a loss of ₹38,400, or 12%. Check: 0.80 × 1.10 − 1 = −0.12.
- Asset down 20% (USD 3,200), dollar down 10% (₹72): 3,200 × 72 = ₹2,30,400, a loss of ₹89,600, or 28%. Check: 0.80 × 0.90 − 1 = −0.28.
Result. A 20% move in the asset produced rupee results of +32%, +8%, −12% and −28%, depending on the direction of the market and of the currency. None is a simple sum of the two percentages.
Key points
- Rupee return = (1 + return in foreign currency) × (1 + change in the rupee price of that currency) − 1; the two effects multiply.
- A weaker rupee adds to the rupee return of an overseas asset; a stronger rupee subtracts from it.
- Currency moves can offset or add to market moves: in 2022 MSCI World fell by about 18% in dollars while the rupee weakened against the dollar.
- Past exchange-rate changes are not a rule for the future.
Common misunderstandings
- A weaker rupee does not always cushion a fall: the rupee can strengthen while markets fall, and the loss in rupees is then larger.
- The rupee's past weakening is not a rate to build into expectations: the pace has varied, and on annual averages it strengthened slightly between 2000 and 2005.
- The market return and the currency change are not simply added: they are multiplied.
Questions people ask
Is currency risk only a risk of loss?
No. Exchange-rate moves can add to the rupee return as well as subtract from it.
How is the change in the rupee price of a currency worked out?
Divide the new rate by the old rate and subtract 1: from ₹80 to ₹76 per dollar is 76 ÷ 80 − 1 = −5%.
Does an Indian mutual fund scheme that invests overseas carry currency risk, even though its units are bought in rupees?
Yes. Its rupee NAV reflects the exchange rate as well as overseas prices. A scheme that invests only in India does not carry this risk.
What this lesson relies on
- US Federal Reserve — foreign exchange rates, annual averages (Indian rupee per US dollar)
- MSCI World Index factsheet — calendar-year return for 2022
This lesson was reviewed independently against these sources on 7 October 2026. Rules change: check the current regulation, scheme document or policy wording before relying on any figure. This is education, not advice.