Be warned: the falling US dollar could crush these top FTSE 100 stocks

The FTSE 100 Index (INDEXFTSE: UKX) has benefitted from the pound’s crash but Harvey Jones fears it may now be punished by sterling’s recovery.

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.

Hulk monster

Image: Public domain

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.

The shock Brexit result in June 2016 was a disaster for the pound, but a triumph for the FTSE 100. As sterling crashed against almost every global currency, the country’s blue-chip stocks flew. Companies on the UK’s benchmark index generate more than three-quarters of their earnings overseas, and these were typically now worth around 16% more once converted back into sterling.

Dollar dip

However, now the trade is going the other way as the pound strengthens and the dollar weakens. The winners of the last 18 months risk becoming 2018’s losers.

Naturally, some FTSE 100 companies did better out of sterling’s meltdown than others. Plant hire specialist Ashtead Group has more US exposure than any other stock on the FTSE 100, generating a whopping 85% of its sales in the US. Its share price has almost exactly doubled from 1,014p immediately after the referendum to today’s 2,116p.

North American exposure

Other factors are at play as well, for example Ashtead benefitted from another type of storm, hurricanes Harvey, Irma and Maria, winning valuable clean-up contracts. Along with the weak pound, that helped it posted a 16% rise in half-year pre-tax profits to £493.1m last month.

Plumbing supplier Ferguson (LSE: FERG) generates 79% of its earnings from the US and has been another beneficiary, its share price leaping from 3,554p to 5,542p since the referendum, a rise of 55%. It is the same story with Shire Pharmaceuticals, which has 67% US exposure, and saw its share price leap almost 30% in the months after the referendum. Cruise operator Carnival, which has 64% dollar earnings, saw its stock jump 58% from 3,389p to peak at 5,355p last September.

Pound strong

Naturally, high dollar earnings are no guarantee of success even when the greenback is riding high against the pound. Shire has struggled since its $32bn acquisition of US company Baxalta in 2016, which as my foolish friend GA Chester pointed out, has increased debt and risk. And publishing group Pearson earns a hefty 64% of its income in the US but has been hit hard by falling educational sales in North America. Its dollar earnings have fallen, as has its share price. 

However, even success stories will find making progress harder as currency tailwinds turn into headwinds. One year ago, the pound traded at just over $1.25. Today, it is a little over $1.40, a rise of 12% in a year. Anybody invested in Ashtead, Ferguson, Shire, Carnival or Pearson needs to take this into account. A US bear market would be another blow.

So far the FTSE 100 as a whole has held up despite dollar weakness. That now hangs in the balance as well.

Brexit Britain

Naturally, currency shifts are not the only issue. Ashtead is still flying, up 32% in the last six months. However, currently trading at 25 times earnings, maybe it is not such a hot play today. Ferguson is also continuing its rally, while Shire stumbles and Carnival is becalmed. Pearson is also struggling, but as Roland Head pointed out, it could be on the cusp of a turnaround.

The pound may have beefed up against the dollar but there is no guarantee this will last. If Brexit negotiations hit a wall it could quickly lose its newfound muscle. 

Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has recommended Carnival and Shire. 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 Articles

Female student sitting at the steps and using laptop
Investing Articles

UK stocks: the contrarian choice for 2026

UK stocks aren’t the consensus choice for investors at the moment. But some smart money managers who are looking to…

Read more »

Investing Articles

Down 20% in 2025, shares in this under-the-radar UK defence tech firm could be set for a strong 2026

Cohort shares are down 20% this year, but NATO spending increases could offer UK investors a huge potential opportunity going…

Read more »

Young Caucasian woman with pink her studying from her laptop screen
Investing Articles

New to investing? Here’s Warren Buffett’s strategy for starting from scratch

Warren Buffett says he could find opportunities to earn a 50% annual return in the stock market if he was…

Read more »

Investing Articles

Can the sensational Barclays share price do it all over again in 2026?

Harvey Jones is blown away by what the Barclays share price has been doing lately. Now he looks at whether…

Read more »

Investing Articles

Prediction: in 2026 mega-cheap Diageo shares could turn £10,000 into…

Diageo shares have been burning wealth lately but Harvey Jones says long-suffering investors in the FTSE 100 stock may get…

Read more »

Investing Articles

This overlooked FTSE 100 share massively outperformed Tesla over 5 years!

Tesla has been a great long-term investment, but this lesser-known FTSE 100 company would have been an even better one.

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

I’m backing these 3 value stocks to the hilt – will they rocket in 2026?

Harvey Jones has bought these three FTSE 100 value stocks on three occasions lately, averaging down every time they fall.…

Read more »

Investing Articles

Can the barnstorming Tesco share price do it all over again in 2026?

Harvey Jones is blown away by just how well the Tesco share price has done lately, and asks whether the…

Read more »