Why it’s essential that you invest outside the FTSE 100

If you’re relying on the FTSE 100 (INDEXFTSE:UKX) index to fund your retirement, you need to read this.

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.

Financial experts often advise that as an asset class, shares will generate returns of 8%-10% per year over the long term. As a result, many individuals base their retirement planning around these calculations.

However if you’ve been relying on the FTSE 100 index to generate this kind of return on your capital, I have some alarming news for you. Over the last decade, the FTSE 100 has not generated that much. In fact, the index hasn’t generated anywhere near this return. Admittedly, a decade ago markets were near all-time highs and since then we’ve experienced the Global Financial Crisis as well as several other periods of high volatility. However, if you’re relying solely on the FTSE 100 to fund your retirement, the returns may not be as high as you’re anticipating. 

Let’s take a closer look at the blue chip index’s performance figures.

Dismal returns

It’s fair to say that over the last decade, the FTSE 100 has been an underachiever.

Take a look at the tables below which show the yearly returns of the FTSE 100, the FTSE 250 and the S&P 500. 

Capital appreciation return (not including dividends)

  FTSE 100 FTSE 250 S&P 500
5 year 4.9 10.4 10.9
10 year 1.5 5.0 5.2
15 year 2.2 7.8 4.9

Total return with dividends reinvested

  FTSE 100 FTSE 250 S&P 500
5 year 8.9 13.5 13.3
10 year 5.4 7.9 7.5
15 year 6.0 10.8 7.1
(Return figures sourced from Bloomberg and calculated up to the end of March 2017)

 

The tables show, that over the last decade, the FTSE 100 has returned just 1.5% per year on a capital appreciation basis, and 5.4% with dividends reinvested. By contrast, the mid-cap FTSE 250 index has returned 4.6% per year on a capital appreciation basis and 7.9% with dividends. 

I’ve also compared the two indices’ performance to the S&P 500. The US index has outperformed the FTSE 100 over five, 10 and 15 years, returning 5.2% a year or 7.5% with dividends reinvested over the last decade. 

Key takeaways

To my mind, there are several fundamental takeaways from these performance figures.

The first involves diversification. It would appear that to achieve the coveted 8%-10% per year over the long term, you really need to invest outside the FTSE 100 index. To be properly diversified, a portfolio should have exposure to different geographical regions and market capitalisations. Many investors suffer from ‘home bias’, preferring only to invest in locally-listed stocks, but having exposure to international stocks could potentially boost portfolio returns. 

Similarly, adding exposure to a mid-cap or small-cap index such as the FTSE 250 could also drive portfolio returns higher. High-quality smaller companies generally outperform their larger peers over the long term, and by having exposure to this area of the market, it could make a significant difference to your performance figures in the long run. 

The figures also highlight the importance of dividends. Many investors ignore dividends, focusing on capital growth in an attempt to build wealth quickly. However, dividends when reinvested, consistently make up the bulk of total investment returns over the long term. It’s therefore important to focus on generating dividends and reinvesting them.

So don’t always rely on experts’ assumptions when building wealth for the long term. While you would think that an index of 100 stocks would provide a suitable level of diversification capable of generating strong long-term returns, this has not been the case over the last decade.

Edward Sheldon has no position in any 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 Articles

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Can someone invest like Warren Buffett with a spare £500?

Christopher Ruane explains why an investor without the resources of billionaire Warren Buffett could still learn from his stock market…

Read more »

Investing Articles

Can these 2 incredible FTSE 250 dividend stocks fly even higher in 2026?

Mark Hartley examines the potential in two FTSE 250 shares that have had an excellent year and considers what 2026…

Read more »

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Is 45 too late to start investing?

Investing at different life stages can come with its own challenges -- and rewards. Our writer considers why a 45-year-old…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

UK shares look cheap — but the market might be about to take notice

UK shares have traded at a persistent discount to their US counterparts. This can create huge opportunities, but investors need…

Read more »

Investing Articles

This FTSE 100 growth machine is showing positive signs for a 2026 recovery

FTSE 100 distributor Bunzl is already the second-largest holding in Stephen Wright’s Stocks and Shares ISA. What should his next…

Read more »

Investing Articles

I asked ChatGPT for the best FTSE 100 stocks to buy for passive income in 2026 and it said…

Paul Summers wanted to learn which dividend stocks an AI bot thinks might be worth buying for 2026. Its response…

Read more »

ISA Individual Savings Account
Investing Articles

Stop missing out! A Stocks and Shares ISA could help you retire early

Investors who don't use a Stocks and Shares ISA get all the risks that come with investing but with less…

Read more »

Investing Articles

Will Greggs shares crash again in 2026?

After a horrible 2025, Paul Summers takes a look at whether Greggs shares could sink even further in price next…

Read more »