The Dollar Just Hit 102. Here's Who in the S&P 500 Pays the Bill.

A strong dollar is a quiet tax on every company that sells abroad. Q3 earnings season is about to show who pays it, and the answer is not as simple as "buy the domestics."

HeyTheo Research · Monday, October 5, 2026

Quick Read

• The US Dollar Index (DXY) closed near 102 on Thursday, Oct 1, its highest level since March 2025, after four straight sessions of gains.

• About 28% of S&P 500 revenue comes from outside the US. In tech it is 56%. In semiconductors it is 67%. In utilities it is 2%.

• A stronger dollar shrinks foreign sales once they are converted back to dollars. That shows up first in guidance, not in the headline beat.

• The trap: "domestic" does not mean "safe." The same rate pressure lifting the dollar is pressing on small caps, which earn about 80% of their revenue at home.

Why 102 matters now

The dollar has climbed for a simple reason. The US is paying more to hold its money than almost anyone else.

The Fed hiked to 3.75% to 4.00% on Sept 16, its first hike since 2023. The 10-year Treasury yield closed at 5.29% on Wednesday, Sept 30, the highest since 2007. Oil above $90 is keeping inflation sticky. Money follows yield, and yield is in dollars.

Odds of a second hike at the Oct 27-28 meeting fell to roughly 37% after soft August PCE data, down from about 70% a week earlier. The dollar rose anyway. That tells us the market sees US rates staying high for a long time, whether the next hike lands in October or December.

Source: ICE, Federal Reserve, Trading Economics, CME FedWatch

How a strong dollar eats earnings

Picture a US company that sells $100 worth of software in Germany. It gets paid in euros. When the dollar strengthens 5%, those same euros convert into roughly $95. Nothing changed in Germany. The customer paid the same. The US income statement still shows less.

That is translation risk. It is mechanical, and it scales with how much of a company's revenue is earned abroad.

One widely used rule of thumb holds that every 1 point of year-over-year gain in the DXY trims about half a point from S&P 500 earnings growth. Treat that as a direction, not a forecast. The real hit depends on each company's hedging, its currency mix, and where its costs sit.

Hedging matters most for timing. Many multinationals hedge 6 to 12 months forward. So the Q3 numbers that start arriving next week may look clean. The damage tends to show up in Q4 and 2027 guidance, when the hedges roll off at worse rates. Read the outlook line before the beat line.

Where the exposure sits

Source: Goldman Sachs analysis of 2024 company disclosures. Companies classify regions differently, so precision varies.

Three readings stand out.

Semis carry the most currency risk in the index. Two-thirds of chip revenue is foreign. That includes the AI memory and accelerator names that have led this market. Demand is strong enough to swamp a currency drag right now. But a strong dollar is one more line where guidance can disappoint.

Energy breaks the usual pattern. Oil is priced in dollars, so a rising dollar normally pushes crude lower. This year the war with Iran has kept Brent above $90 even as the dollar climbed. Producers are being paid in a strong currency at a high price. That combination rarely lasts. If either leg cracks, the earnings math changes quickly.

Utilities are the most domestic, and also the most rate-sensitive. Two percent foreign revenue means almost no translation drag. But utilities carry heavy debt and trade like bonds. When yields sit at 5.29%, their dividend yields have more competition.

The domestic trap

The easy headline says: strong dollar, so own companies that sell at home. The data argues for more care.

The force pushing the dollar up is high US rates. The Russell 2000 earns about 80% of its revenue domestically, so it dodges most of the currency hit. But small caps also carry more floating-rate debt than large caps. They feel every move in borrowing costs. In this setup, a "domestic" basket can swap a currency problem for a rate problem.

The cleaner winners are narrower. They are US companies that sell at home but buy abroad: retailers and distributors importing goods, which now get more product for each dollar. A strong dollar works like a discount on their cost of goods, though tariffs can cancel part of it. The losers are the reverse: companies that build in the US and sell overseas, where the dollar makes their goods pricier for foreign buyers.

So the question for any name is not "domestic or global." It is a two-line check. Where does the revenue come from? Where do the costs and the debt sit?

Rules HeyTheo tracks

The desk watches this regime with a few plain rules rather than predictions:

• Global vs domestic revenue baskets. Two baskets, split on reported foreign revenue share, compared week to week. A widening gap during a dollar rally confirms translation risk is being priced.

• DXY regime trigger. A trigger fires when the DXY holds above 100 for five sessions. It sits above that line now.

• Guidance language trigger. During earnings, the desk flags any company citing "foreign exchange" or "currency" as a headwind to its outlook.

• Ask Theo. Try: "Which of my holdings earn more than half their revenue abroad?" or "Show me how this stock traded the last time the dollar rose 5% in a quarter."

Check the rule behind any trigger before acting on it. You trade through your own broker; HeyTheo helps you decide.

This note connects to our earlier work on the bond selloff and the Warsh Fed. The same 5% yield sits under all three stories.

The Exchange Rate Line Item

The dollar at 102 is not a crisis. It is a cost. It lands unevenly, and earnings season is when the bill arrives.

Three things to keep open over the next month. First, the outlook paragraph in every multinational's Q3 report. Second, whether oil and the dollar keep rising together, which is the unusual pairing propping up energy. Third, the Oct 28 Fed decision, because the dollar is mostly a rates story wearing a currency costume.

FAQs

What is the US Dollar Index (DXY)?

It measures the dollar against six major currencies: the euro, yen, pound, Canadian dollar, Swedish krona and Swiss franc. The euro carries the largest weight. A higher reading means a stronger dollar.

Why does a strong dollar hurt US companies?

Revenue earned in foreign currencies converts into fewer dollars. The business abroad can be unchanged while reported sales and profits fall.

Which S&P 500 sectors have the most foreign revenue?

Semiconductors, at about 67%, then information technology at 56% and materials at 49%. Utilities are the most domestic at around 2%.

Are small caps a safe hiding place from a strong dollar?

Partly. The Russell 2000 earns about 80% of revenue at home, so currency drag is smaller. But small caps tend to carry more floating-rate debt, so the high rates behind the dollar rally still bite.

When will the dollar's impact show up in earnings?

Often with a lag. Many companies hedge 6 to 12 months ahead, so the clearest signs usually appear in forward guidance rather than the current quarter's results.

Sources

ICE, Federal Reserve, CME FedWatch, Trading Economics, Goldman Sachs, Morgan Stanley

Disclaimer

Disclaimer: HeyTheo is a research and education platform, not an investment adviser or broker-dealer. Nothing here is advice to buy, sell, or hold any security. You trade through your own broker; HeyTheo helps you decide. Backtested results are hypothetical and do not guarantee future returns. References to governments, officials, or policies are for market context only and are not political endorsements. All investing involves risk, including loss of principal. Data is as of the dates noted.