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.

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.

Hulk monster

Image: Public domain

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

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

ISA or SIPP? Here’s 1 advantage and 1 disadvantage of both

SIPPs and Stocks and Shares ISAs both have potentially attractive features, as well as downsides. Christopher Ruane looks at some…

Read more »

Portrait of pensive bearded senior looking on screen of laptop sitting at table with coffee cup.
Investing Articles

£1,000 invested in Lloyds shares 6 weeks ago is now worth…

Lloyds shares have been on a huge run in the last couple of years. But is a 15% pullback in…

Read more »

Man smiling and working on laptop
Investing Articles

After the FTSE 100’s slump, these bargain shares are calling!

Are you on the lookout for top cheap stocks to buy? Royston Wild reveals three FTSE 100 value shares he's…

Read more »

Man hanging in the balance over a log at seaside in Scotland
Investing Articles

Worried about a stock market crash? Here are 2 things you should know

A stock market crash may look plausible, but it’s far from a done deal. Still, if markets do wobble, I…

Read more »

piggy bank, searching with binoculars
Investing Articles

This FTSE 100 stock soared 900% — but after a 25% crash, is the rally over?

After blowing away the FTSE 100 in 2025, this miner has hit turbulence in 2026 — Andrew Mackie investigates what’s…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

How much do I need in an ISA for a £700 second income?

Investing in dividend shares can be a great way to target a second income from a Stocks and Shares ISA.…

Read more »

Businessman with tablet, waiting at the train station platform
Investing Articles

If there’s a stock market crash this week, will you be ready?

Christopher Ruane explains why he's not phased by the inevitability of a stock market crash -- but is actively preparing…

Read more »

Mindful young woman breathing out with closed eyes, calming down in stressful situation, working on computer in modern kitchen.
Investing Articles

£15,000 invested in Diageo shares 3 weeks ago is now worth…

Bad times for Diageo shares! The last three weeks have seen yet another drop, but is this a time to…

Read more »