Is the recent FTSE 100 rally built on sand?

Can the FTSE 100 (INDEXFTSE: UKX) rally continue or is the index set up to fail?

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.

It’s been a great year to be an investor in the UK’s leading stock index. After a rocky 2015, which saw the FTSE 100 jump to a high of 7,089 before crashing back under 6,000, this year the index has risen from a low of 5,700 to a high of nearly 7,050, a gain of around 13%. 

These gains have come despite Brexit and Trump, confounding almost all of the City’s top equity analysts. Most analysts were forecasting a broad-based sell-off following a Brexit or Trump event.  

The big question is why do investors feel so optimistic when the outlook for the global economy has never been more uncertain?

Dissecting the gains

A good chunk of the FTSE 100’s gains since the end of June have come thanks to the devaluation of sterling. More than two-thirds of the index’s earnings come from outside the UK and a weaker pound translates into higher earnings for the index’s constituents. Greater earnings potential has made the index look cheaper, and as a result, investors have been buying. 

However, in US dollar terms, excluding the lift from weak sterling, the FTSE 100 has actually fallen by 4% this year. 

So stripping out currency effects, the FTSE 100’s recent rally is non-existent. But it’s not just weak sterling that’s given the UK’s leading index a boost this year. Donald Trump’s election as president of the United States has lifted US equity markets, sending the S&P 500 and Dow Jones Industrial Average to record levels on the hopes the he will unleash a multi-trillion dollar stimulus programme to make America great again. 

In my view, this Trump-driven rally is going to be short-lived. Investors are buying into his dream but for how much longer this will last remains to be seen. Trump has promised a lot, and it’s highly likely he will fail to deliver on all of his promises. Markets like to buy the rumor and sell the news, so even if Trump does deliver the US markets could slump, which would drag the FTSE 100 down with them. 

Built on sand

The FTSE 100’s recent gains are nothing more than Trump hope and a weak pound. If sterling recovers its losses next year, the index’s gains could evaporate, and if Trump fails as America’s saviour, the FTSE 100 will surely come off its highs. 

Still, if the FTSE 100’s constituents manage to generate material earnings growth next year, the index may be able to hold on to its gains. If the pound remains depressed, it will also be good news for the index. 

Look to the long term

Having said all of the above, long-term investors don’t need to be worried about what the next 12 months hold for the FTSE 100. Currency fluctuations and political turbulence are a natural part of investing in the short term but over the next five or 10 years, turmoil in the next 12 months won’t matter to investment returns. 

Overall, the FTSE 100’s 2016 rally might be built on sand, but over the long-term, the index is bound to generate steady returns for investors.

Rupert Hargreaves has no position in any shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

UK financial background: share prices and stock graph overlaid on an image of the Union Jack
Investing Articles

New to investing in the stock market? Here’s how to try to beat the Martin Lewis method!

Martin Lewis is now talking about stock market investing. Index funds are great, but going beyond them can yield amazing…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

This superb passive income star now has a dividend yield of 10.4%!

This standout passive income gem now generates an annual dividend return higher than the ‘magic’ 10% figure, and consensus forecasts…

Read more »

Young woman working at modern office. Technical price graph and indicator, red and green candlestick chart and stock trading computer screen background.
Investing Articles

£5,000 invested in Tesco shares on 1 January 2025 is now worth…

Tesco shares proved a spectacular investment this year, rising 18.3% since New Year's Day. And the FTSE 100 stock isn't…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

With 55% earnings growth forecast, here’s where Vodafone’s share price ‘should’ be trading…

Consensus forecasts point to 55% annual earnings growth to 2028. With a strategic shift ongoing, how undervalued is Vodafone’s share…

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

Here’s how I’m targeting £12,959 a year in my retirement from £20,000 in this ultra-high yielding FTSE 100 income share…

Analysts forecast this high-yield FTSE 100 income share will deliver rising dividends and capital gains, making it a powerful long-term…

Read more »

A senior man using hiking poles, on a hike on a coastal path along the coastline of Cornwall. He is looking away from the camera at the view.
Investing Articles

Is Diageo quietly turning into a top dividend share like British American Tobacco?

Smoking may be dying out but British American Tobacco remains a top dividend share. Harvey Jones wonders if ailing spirits…

Read more »

Young woman holding up three fingers
Investing Articles

Just released: our 3 top income-focused stocks to consider buying in December [PREMIUM PICKS]

Our goal here is to highlight some of our past recommendations that we think are of particular interest today, due…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Tesco’s share price: is boring brilliant?

Tesco delivers steady profits, dividends, and market share gains. So is its share price undervaluing the resilience of Britain’s biggest…

Read more »