How DXY Affects Stocks and Earnings

A U.S. company can sell exactly as much in Europe as last year and still report $10 million less. That's what happens to €100 million of sales when the euro slips from $1.10 to $1.00.

Watch it play outSame euro sales, $10 million less in dollars

A U.S. company's European unit sells €100 million. Picture 100 dots, a million euros each.

At $1.10 per euro, those sales are reported as $110 million.

The euro slips to $1.00. The same 100 dots now report as $100 million.

Zoom in on the rim: that thin sliver is the $10 million that vanished in translation.

Nothing changed in Europe. The business sold exactly as much; the dollar figure fell by $10 million.

Replay

That translation effect is one of four ways the dollar index, DXY, reaches stock prices. Whether a stronger dollar hurts or helps stocks depends mostly on why the dollar rose and which companies are exposed. Below, one cost question shows why the same currency move can shave 9% off one company's profit and nearly half off another's.

Watch it play outA stronger dollar reaches stocks four ways

DXY measures the dollar against a basket of six currencies, led by the euro.

When DXY rises, the dollar is gaining on all six.

That strength travels into stock prices through four channels.

It shrinks the dollar value of foreign sales, but makes imported inputs cheaper.

It squeezes borrowers who owe dollars and cuts the dollar return on foreign stocks. Which channel wins depends on why the dollar rose.

Replay

The short version

• A rising DXY means the dollar is gaining against a basket of six currencies. It shrinks the dollar value of foreign sales and makes imported inputs cheaper.
• The dollar reaches stocks through four channels: foreign-revenue translation, import costs, global dollar funding, and international portfolio returns.

Four ways a stronger dollar reaches stocks

Channel	What a stronger dollar does	Who feels it most
1. Translation	Shrinks the dollar value of foreign sales	U.S. multinationals
2. Import costs	Makes foreign inputs cheaper	Importers, retailers, manufacturers
3. Global funding	Squeezes borrowers who owe dollars	Emerging markets, leveraged borrowers
4. Portfolio returns	Cuts the dollar return on foreign stocks	Owners of international investments

• A dollar rising on strong U.S. growth and one rising on global fear can come with opposite stock-market outcomes.

What DXY measures, briefly

DXY compares the dollar with a fixed basket: the euro, Japanese yen, British pound, Canadian dollar, Swedish krona and Swiss franc. The euro carries the largest weight. China, Mexico, South Korea and several other major U.S. trading partners are absent.

That makes DXY a useful traded benchmark but an incomplete picture of U.S. commerce. The Federal Reserve's H.10 dollar indexes cover a wider group of trading partners and update their weights with trade. If you're choosing between the two, DXY vs. the trade-weighted dollar index walks through which fits which question. The DXY definition covers the basics.

Four ways the dollar reaches stock prices

1. Foreign revenue shrinks (or grows) in translation

U.S. companies report in dollars, so foreign sales get converted, or "translated," at the going exchange rate. Take a hypothetical European subsidiary earning €100 million:

The business sold the same amount in euros. The reported number still fell by $10 million. Costs paid in euros offset part of that, and many companies hedge, meaning they use contracts to lock in exchange rates ahead of time.

Same euro sales, $10 million less in dollars

1. Dollar strengthens (Euro: $1.10 → $1.00) to Same €100m of sales (Translated at the new rate)
2. Same €100m of sales (Translated at the new rate) to Reported revenue ($110m → $100m)
3. Euro costs and hedges (Offset part of it) to Reported revenue ($110m → $100m)

This is why investors look at constant-currency growth: revenue growth recalculated as if exchange rates hadn't moved. In the example, constant-currency revenue is flat while reported revenue drops $10 million. Constant-currency figures are a management calculation, not audited results, so read the company's definition and reconciliation.

Worked example: where the costs sit decides the damage

Hypothetical example: give the same subsidiary €80 million of costs, so it earns €20 million of operating profit. Now compare two versions of the company. In version A, those costs are paid in euros. In version B, the same costs are paid in dollars, fixed at $88 million.

Make a guess

Version B pays its costs in dollars, fixed at $88 million. When the euro slips from $1.10 to $1.00, how much of its $22 million operating profit disappears?

Tap your guess

0%Your guess: 0%10%Your guess: 10%20%Your guess: 20%30%Your guess: 30%40%Your guess: 40%50%Your guess: 50%60%Your guess: 60%70%Your guess: 70%80%Your guess: 80%90%Your guess: 90%100%Your guess: 100%

01234567890123456789.0123456789%Actual

Spot on.Close, a little low.Close, a little high.Way off, too low.Way off, too high. It was 45.5%.

Revenue falls $10 million to $100 million while dollar costs stay at $88 million, so profit drops from $22 million to $12 million.

Actual45.5%

Version A, costs in euros9.1%

Steps: $2m ÷ $22m ≈ 9.1%, and $10m ÷ $22m ≈ 45.5%. Same revenue, same currency move. In version A the euro costs shrink alongside the euro sales and act as a natural hedge. In version B nothing offsets the revenue drop, so almost half the profit disappears.

Where costs sit decides the damage

Pick where the costs are paid and the exchange rate

Costs paid in

EurosDollars

Euro exchange rate

$1.10$1.05$1.00

Operating profit$22m$21m$20m$22m$17m$12m

0.0%−4.5%−9.1%0.0%−22.7%−45.5%in line with Profit at $1.10below Profit at $1.10below Profit at $1.10in line with Profit at $1.10below Profit at $1.10below Profit at $1.10

Profit at $1.10 $22m

$12m$22m

€80m$88m fixed

That's why the foreign-sales percentage alone won't tell you a company's currency risk. You need to know where it spends, too.

2. Import costs and margins

A stronger dollar makes goods and inputs priced in foreign currencies cheaper in dollar terms. U.S. retailers and manufacturers with foreign supply chains can benefit, especially if they keep customer prices unchanged.

It isn't instant. Contract currency, hedging, tariffs, inventory timing and competition all decide how much of the saving reaches margins, and when.

Cheaper imports reach margins late and partly

1. Stronger dollar to Foreign inputs cheaper (In dollar terms)
2. Foreign inputs cheaper (In dollar terms) to Filters (Contracts, hedges, tariffs, inventory, competition)
3. Filters (Contracts, hedges, tariffs, inventory, competition) to Wider margins (If prices hold)

3. Commodities and global funding

Many commodities and international debts are priced in dollars. A stronger dollar squeezes borrowers who earn in local currency but owe dollars. It can also weigh on some commodity prices, though supply shocks often overpower the currency effect.

For emerging markets, a stronger dollar combined with higher U.S. yields and money flowing out (capital flows) can matter more than DXY on its own.

4. Returns on foreign investments

If you own foreign stocks, currency moves change your return in dollars. The SEC notes that exchange-rate movements can raise or cut the return on an international investment; see Investor.gov's international investing guide. A foreign stock can rise in its home currency and still deliver less in dollars if that currency weakens.

Make a guess

A foreign stock gains 10% in its own currency while that currency falls 10% against the dollar. What's your return in dollars?

Tap your guess

A lossYour guessRoughly break evenYour guessA gainYour guess

−0123456789%Actual

Spot on.Close, a little low.Close, a little high.Way off, too low.Way off, too high. It was −1%.

1.10 × 0.90 = 0.99. The currency loss applies to the larger, post-gain value, so the moves don't cancel.

Hypothetical example: a foreign stock gains 10% in its own currency while that currency falls 10% against the dollar. Your dollar result is 1.10 × 0.90 = 0.99, a 1% loss. The two moves don't cancel, because the currency loss applies to the larger, post-gain value.

Member research: Funding conditions are where currency and credit meet. Issue 05 follows AI infrastructure financing as it moves into private credit, insurance balance sheets and securitized debt, and shows how NVIDIA turns its roadmap knowledge into cheaper capital for customers.

Why the dollar rose matters more than how much

The same DXY move can come with opposite equity outcomes. Before reading anything into a dollar chart, find the cause.

Same dollar move, opposite stock outcomes

1. DXY rises to Stronger U.S. growth
2. DXY rises to Global risk aversion
3. Stronger U.S. growth to Domestic earnings offset translation
4. Global risk aversion to Risk assets can fall

Which stocks are most exposed?

How to read currency commentary in earnings

Look for five disclosures:

1. Reported revenue growth
2. Constant-currency revenue growth
3. Foreign-exchange effect on operating income or margins
4. Hedging gains, losses, and how long hedges run
5. Where revenue and costs are located

The gap between items 1 and 2 is the currency effect on sales. Item 5 tells you whether the company looks more like version A or version B in the worked example.

Try it yourself

A 10-minute exercise with a U.S. multinational you own or follow:

1. Open its latest earnings release and write down reported and constant-currency revenue growth. The gap is the currency effect.
2. Open the company FX sensitivity calculator. Enter the company's largest foreign region with its revenue mix and a -10% currency move.
3. Set that row's cost mix to zero, note the EPS impact, then set cost mix equal to revenue mix and run it again. That's version B, then version A.
4. If you own a foreign stock or fund, enter its local-currency return and the currency's move into the currency-adjusted return calculator.
5. Look at the last big DXY move and decide which row of the "why the dollar rises" table it fits.

You should now be able to answer: if the dollar jumped tomorrow, would this company's earnings fall a lot, a little, or barely at all, and why?

Our read

Treat DXY as the first question, not the answer. A stronger dollar can pressure translated foreign earnings and tighten global funding. It can also lower import costs and signal stronger U.S. growth. A weaker dollar helps translated revenue while raising some input costs.

The investment conclusion comes from the company: where it sells, where it spends, what it hedges, what it owes, and what the price already assumes. Before blaming a stock move on the dollar, check:

• Did DXY move because of growth, rates or fear?
• Where does the company earn revenue, and where does it incur costs?
• Which currencies are involved, and how much is hedged?
• Does management report constant-currency figures?
• Are commodity prices moving for a separate supply reason?
• Was the currency effect already in guidance?

If most of those point to the dollar, it's a real driver. If they don't, the dollar is probably a coincidence on the chart.

Questions readers ask

Does a strong dollar mean I should sell U.S. stocks?

Not on its own. A dollar rising on strong U.S. growth can come with healthy domestic earnings, while one rising on global fear can come with falling risk assets. The cause matters more than the move.

Which companies benefit from a weaker dollar?

Multinationals with large foreign sales and dollar-based costs translate those sales into more dollars, which is version B of the worked example running in reverse. Importers can lose, because foreign inputs cost more in dollars.

Why did my international fund lag even though foreign markets rose?

Currency. If the foreign currency weakened against the dollar, it cut into your dollar return, as in the 10% gain that became a 1% loss above. Check the fund's local-currency return against its dollar return.

Can I trust constant-currency numbers?

They're useful for separating business performance from currency moves, but they're a management calculation, not audited results. Read how the company defines them and check the reconciliation to reported figures.

Go deeper with member research

For commodity producers, the dollar, the commodity price and the cost base all interact. A member case study works through one:

• Newmont and the gap between a gold rally and shareholder cash: Whether cost control could turn a stronger gold price into cash for shareholders, as the evidence stood on February 23, 2026.
• The fundamental research course: 40 chapters that take you from reading a 10-K to writing your own research memo. The first chapter is free.

Limits of this data

• Currency relationships change over time, so a past link between DXY and a stock or sector may not hold.
• Hedging, taxes, regulation and company-specific exposures can materially change the result for any single stock.