Here’s what the Trump auto tariffs could mean for the UK stock market

Jon Smith explains the implications of fresh auto tariffs on the stock market and flags up a UK share that could be negatively impacted.

| More on:

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

Two business people sitting at cafe working on new project using laptop. Young businesswoman taking notes and businessman working on laptop computer.

Image source: Getty Images

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

Yesterday (26 March) President Trump announced that he’d be imposing 25% tariffs starting next week on all foreign-made cars. Not just the finished products, but it also applies to some car parts and components. As a result, it doesn’t surprise me that stock markets around the world are trading lower today. Here are the potential implications.

Taking the hit for exports

The immediate concern that comes to mind relates to the impact on UK car manufacturing. For example, consider Aston Martin (LSE:AML). The luxury car manufacturer exports to the US, so a 25% tariff would make the cars significantly more expensive in that market, potentially reducing sales volumes.

Unlike mass-market brands, Aston Martin operates in the luxury niche. The 2024 results showed wholesale volumes of 6,030 cars, which is small in comparison to more mainstream firms. As a result, having fewer cars sold could have a disproportionate impact on revenue, given the size of the market.

To offset the tariff, management at Aston Martin could decide to absorb the cost. Even though this would act to keep demand as normal, it would reduce profit margins. Last year it recorded a gross margin of 36.9%, so a 25% hit on this clearly wouldn’t be great.

Finally, the business has no assembly plants in the US. So it’s not as if it can ramp up production in the country, avoiding tariffs that way. The stock is already down 57% over the past year, and I don’t think this latest news will help it going forward at all.

However, the US is just one market. With a strong new line-up of vehicles, boosted marketing from Formula 1 and a higher average selling price (ASP), the business could shift focus to other geographical regions instead to offset the tariff impact. In this case, things might not actually be that bad.

Other market impacts

Aside from Aston Martin, there are other impacts on the stock market more generally. For example, there are many businesses involved in some way in the automotive supply chain. This includes parts suppliers and logistics firms, meaning that they may experience operational challenges due to increased costs and trade barriers.

The continued tariff uncertainty isn’t great for investor sentiment. The broader market may witness heightened volatility as investors react to the escalating trade tensions and their potential impact on the UK economy. As a case in point, there could be UK job losses with car manufacturing plants in the UK, like Nissan’s Sunderland operations. This could sour sentiment further, causing investors to move to defensive stocks or choose to sit in cash.

The flipside is that we don’t actually know whether this tarfiff decision will be enforced. Already this year we have seen tariff delays, with some being dropped altogether. It’s a moving picture, so investors shouldn’t panic and make rushed investment decisions. Keeping a long-term view of the market should help to cut through the noise in the coming weeks.

Jon Smith has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing For Beginners

Investing Articles

Want to start buying shares next week with £200 or £300? Here’s how!

Ever thought of becoming a stock market investor? Christopher Ruane explains how someone could start buying shares even on a…

Read more »

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing For Beginners

Martin Lewis is embracing stock investing, but I think he missed a key point

It's great that Martin Lewis is talking about stocks, writes Jon Smith, but he feels he's missed a trick by…

Read more »

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing Articles

How can we get started building a passive income ISA in 2026?

Didn't an ancient Chinese investor say the journey to a passive income fortune begins with a single step? If they…

Read more »

Investing Articles

Seeking New Year bargains? FTSE 100 index shares remain on sale!

These FTSE 100 index stocks have surged in value in 2026. But they still offer plenty for value investors to…

Read more »

Landlady greets regular at real ale pub
Investing Articles

Will the crashed Diageo share price rebound 63% in 2026?

Diageo's share price has collapsed by more than a third since 1 January. But these brokers expect the FTSE 100…

Read more »

Investing For Beginners

How much do you need in an ISA to make the average UK salary in passive income?

Jon Smith runs through how an ISA can help to yield substantial income for a patient long-term investor, and includes…

Read more »

A rear view of a female in a bright yellow coat walking along the historic street known as The Shambles in York, UK which is a popular tourist destination in this Yorkshire city.
Investing Articles

Is the BP share price about to shock us all in 2026?

Can the BP share price perform strongly again next year? Or could the FTSE 100 oil giant be facing a…

Read more »

ISA coins
Investing Articles

3 reasons I’m skipping a Cash ISA in 2026

Putting money into a Cash ISA can feel safe. But in 2026 and beyond, that comfort could come at a…

Read more »