(Bloomberg) — Rising tariffs and the weakening dollar (DX=F) are casting a shadow on companies’ profit guidance this earnings season, with more damage seen unfolding over the coming quarters.

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Companies across Europe are already sounding the alarm following the dollar’s slide to three-year lows versus the euro and to a 10-year trough against the Swiss franc. That’s another headache for stock markets grappling with the risk of an economic slowdown due to President Donald Trump’s policies on trade.

Given that Stoxx 600 index (^STOXX) members get 60% of their sales from overseas, such a large dollar slide is unwelcome, as it would sharply reduce the worth of US earnings once converted back into local European currencies. As a result, US-exposed stocks in the region are falling with the dollar and many investors are turning to domestically-geared firms as an alternative.

Among those flagging the exchange-rate headache is SAP SE, the continent’s most valuable firm. Describing the greenback’s weakness as a medium-term earnings headwind, the software maker’s chief financial officer told investors the hit should become evident next year as currency hedges start to expire.

At Dutch beermaker Heineken NV, (HEIA.AS) meanwhile, the euro’s strength against a range of currencies is expected to curtail this year’s revenue by €1.72 billion ($2 billion). French medical-diagnostics company BioMerieux and British retailer WH Smith Plc also highlighted exchange-rate risks during their earnings reports.

“European companies will have to wake up to the idea that their price competitiveness can no longer rely on a stronger US dollar,” said Florian Ielpo, head of macro research at Lombard Odier Investment Managers.

While the current earnings season won’t capture the effect of tariffs unveiled on April 2, “the third quarter will be the eye of the storm,” Ielpo predicted.

Meanwhile, forecasters expect the trade war to hurt the greenback further and potentially stoke a recession in the US. That’s knocked the S&P 500 8.6% lower so far in 2025, and largely trimmed this year’s advance in European equities.

Each 5% rally in the euro and other local currencies against the dollar shaves 1.5 to two percentage points off earnings growth in the MSCI Europe gauge, Morgan Stanley strategists estimate, describing the currency moves as “a broad-based drag.”