When investors look at stocks, the usual focus is earnings, interest rates, and economic growth. But there is one other variable that influences stock performance silently. That factor is currency.
Exchange rates move daily in the global foreign exchange market, which sees over $9.6 trillion in daily trading volume, according to the April 2025 BIS Survey results. These movements influence company earnings, investor returns, and sometimes even sector performance.
For investors tracking international companies on StockPrices.com, the currency impact on stocks is something that shows up frequently in earnings reports and market commentary.
A company may post strong sales numbers, but currency movements can still change how those results look in financial statements.
The currency impact on stocks becomes obvious when looking at multinational companies.
Many large companies earn a big share of their revenue outside their home country. When those earnings are converted into the company’s reporting currency, exchange rate changes can increase or reduce the final numbers.
Data from FactSet shows that about 41 percent of S&P 500 company revenue comes from international markets.
This means currency movements can affect earnings even if the company’s business performance remains stable.
A good example is Apple.
Apple sells products worldwide and generates a large portion of its revenue outside the United States. When the dollar strengthens, overseas sales translate into fewer dollars when reported in financial statements.
Companies often refer to this in earnings calls as foreign exchange headwinds.
In practical terms, the currency impact on stocks usually appears in three ways:
For companies with global exposure, currency changes are a regular part of financial analysis.
The foreign exchange market effects on stocks are visible across different industries.
Large global companies often report how currency movements influence their results.
For example:
These examples show how the foreign exchange market effects show up directly in company earnings.
The international competitiveness of companies gets impacted by currency fluctuations.
When the currency of a country declines in value:
When the currency strengthens:
The automotive industry, heavy machinery sector, and electronics sector all respond to these developments in rapid time.
Currency strength can also influence global investment flows.
Investors often move capital toward countries with stronger currencies because they expect more stable returns.
This movement of money between markets is another example of foreign exchange market effects shaping stock prices.
The relationship between a strong dollar and stocks is not the same for every company.
For multinational firms, a stronger dollar often creates challenges.
This happens mainly because foreign earnings convert into fewer dollars.
Analysts at firms such as Goldman Sachs estimate that a 10 percent rise in the U.S. dollar can reduce S&P 500 earnings by about 2 to 3 percent.
Technology companies are especially exposed to currency movements.
Many large technology firms earn more than half their revenue outside the United States.
Examples include:
When the dollar rises sharply, these companies sometimes warn investors about currency pressure during earnings reports.
But the relationship between strong dollar and stocks is not always negative.
Some industries actually benefit.
Examples include:
In these cases, a stronger currency can reduce operating costs.
This is why the connection between strong dollar and stocks often varies across sectors.
Currency cycles also move in the opposite direction.
When the dollar weakens, multinational companies usually see some benefit.
Common effects include:
During 2025, the U.S. dollar declined by about 10 percent over the year.
Several multinational companies, including Netflix, PepsiCo, and 3M, mentioned currency benefits during earnings discussions.
Some analysts estimate that a 10 percent drop in the dollar can increase S&P 500 earnings by roughly 2 percent.
For investors watching international markets, currency cycles often explain why global stocks outperform at certain times.
Buying international stocks also introduces global investing currency risk.
This risk appears whenever investors hold assets in a foreign currency.
Exchange rate movements can change the final return once profits are converted back into the investor’s home currency.
A simple example helps explain this.
Imagine a U.S. investor buys shares in a Japanese company.
After converting the returns back to dollars, the investor’s gain becomes much smaller.
This is why international portfolios sometimes behave differently from domestic ones.
Currency volatility is particularly noticeable in emerging markets.
Several factors can increase global investing currency risk in these economies:
Because of these factors, currency swings in emerging markets can be larger than in developed economies.
For investors building global portfolios, managing global investing currency risk becomes an important part of decision making.
Currencies are closely linked to several major economic indicators.
Three factors influence both currencies and stock markets.
Increased rates will bring more foreign investment and currency appreciation will influence stock prices.
Reduced inflation promotes stronger currencies and more stable financial markets.
Growing countries are more likely to see increases in stock markets and currency strength at the same time.
These connections justify the reason why investors track currency markets as well as stock markets.
Global revenue exposure among large companies has grown steadily.
An example is that S&P 500 companies had an international revenue of more than 856 billion in one quarter of 2025.
Such foreign exposure has made currency impacts on stocks to become a common market analysis tool.
Currency trends are influenced by a number of indicators that are followed by investors who trade in international stocks.
The common indicators are:
These cues enable investors to understand the overall foreign-exchange implications on equity markets.
The currency impact on stocks, the connection between strong dollar and stocks, and the risks tied to global investing currency risk continue to shape how investors evaluate international markets.
