Every business day, a reference rate is published for how many rupees it takes to buy one US dollar. Today that rate was 95.21, meaning one dollar purchased approximately 95.21 rupees. When this number rises — say from 95 to 97 — the rupee is said to have weakened or depreciated. When it falls, the rupee is said to have strengthened or appreciated. This single number has a wide range of effects on Indian businesses, depending on whether a company earns in dollars, spends in dollars, or does both.

The exchange rate between the rupee and the dollar is not merely a currency statistic — it quietly shapes earnings, input costs, and investment flows across large parts of the Indian economy.

Indian IT and software services companies are among the most directly affected by a weaker rupee, which partly explains why currency movements are watched closely alongside NIFTY IT. These companies bill their clients in US dollars but pay most of their employees and operational expenses in rupees. When the rupee weakens, the same dollar revenue converts into more rupees, which can support reported profits. The reverse is also true: a stronger rupee can compress rupee-denominated earnings even if dollar revenues remain flat. On the other side of the equation, companies that import raw materials — such as those in pharmaceuticals, electronics, or oil refining — pay for their imports in dollars. A weaker rupee makes those imports more expensive in rupee terms, which can squeeze margins or push up consumer prices. Today's rupee closed slightly stronger on the day at 95.21, though it was noted to have ended the week softer overall due to sustained dollar demand, illustrating how the rate can move in different directions across different time horizons.

For the broader market, the exchange rate also influences the behaviour of Foreign Institutional Investors. When FIIs invest in Indian equities or bonds, they convert dollars into rupees to make those purchases. If the rupee later weakens significantly, their returns in dollar terms are reduced even if the Indian asset has gained in rupee terms. This dynamic means that periods of sharp rupee depreciation can sometimes coincide with FII outflows, as the currency risk weighs on the attractiveness of Indian assets from a global investor's perspective. Understanding these linkages helps investors interpret market data more clearly — recognising that a move in the exchange rate is rarely an isolated event, but one that ripples through corporate earnings, import costs, inflation, and institutional investment decisions simultaneously.