Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

Why I think this investment could beat a FTSE 100 index fund

When in comes to index fund investing, could the FTSE 250 perform better than the FTSE 100?

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.

The popularity of index funds is on the rise. It is easy to see why, as they seem to be a great way to invest. 

When buying an individual stock can sometimes rack up a fee of £10, the barriers to buying an index fund are lower. The fee is usually charged as a percentage of what is held in the fund. This amount can be very low, often around 0.1%. 

It is common to be able to buy into an index fund with as little as £100. In our example above, if you bought an individual share for £100, a £10 fee would mean you’re 10% down on your investment already. 

An index fund often also allows the investor to buy into a ready-made, diversified portfolio. 

Choosing 

As with all things investing, when buying index funds there is still an important choice to make. 

Although it may seem like a percentage point here or there, maximising returns – however small – can make a real difference to an investor’s success over the long-term. This is due to the powerful force of compound interest. 

Therefore, when buying into an index fund, it’s important that we make the decision with the same due diligence we would when picking an individual share. 

FTSE 100

Investors may commonly choose an index fund that aims to replicate the returns of the FTSE 100

It is easy to see why: the index is made up of the UK’s top 100 listed companies. Its components include businesses involved in industries such as tech, mining, consumables, and financials. 

A large percentage of the revenues of the index emanate from outside of the UK. This may be seen as a benefit to investors who are seeking an element of international diversification. 

On the face of it, the index sounds great. But investors may want to look at an alternative. 

FTSE 250 

The FTSE 250 sits below the FTSE 100, and is made up of the next 250 largest listed companies in the UK.  

As you might expect, the component parts of the FTSE 250 also include businesses from a spread of different industries. 

As the FTSE 250 is made up of slightly smaller companies, and with a more domestic focus, I believe that in the future it might have more room than the FTSE 100 to grow. 

Let’s take a look at the historic data. 

FTSE 100 vs FTSE 250

History may not repeat itself, but I think it is helpful to see how the two indices have performed in the past. 

Harvey Jones has pointed out that while the FTSE 100 has delivered a total return over five years of 32.3%, the FTSE 250 has returned 48.9% over the same period. Over the long term, this could make a huge difference to an investor’s prosperity.

For long-term growth, it could be the case that the FTSE 250 offers the best prospects. But the beauty of index fund investing is that you can build a portfolio of index funds. It may be that you chose to invest in both types of index funds. After all, you don’t want to have all of your eggs in one basket.

T Sligo 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 Articles

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

These FTSE shares crashed in 2025… what now?

Anyone who bought these FTSE shares at the start of 2025 is probably kicking themselves right now. But after falling…

Read more »

Investing Articles

Forecast: here’s how far the S&P 500 could climb in 2026

S&P 500 stocks continue to deliver strong returns for shareholders even as economic conditions remain soft, but can this market…

Read more »

Arrow symbol glowing amid black arrow symbols on black background.
Investing Articles

12.4% yield and 36% undervalued! Is it time to buy this FTSE 250 passive income star?

This energy infrastructure enterprise now has one of the highest yields in the FTSE 250 with one of the biggest…

Read more »

Investing Articles

Will the strong IAG share price surge 69% in 2026?

IAG's share price has been one of the FTSE 100's best performers this year. Royston Wild considers if it might…

Read more »

Rolls-Royce Hydrogen Test Rig at Loughborough University
Investing Articles

I asked ChatGPT for a discounted cash flow on the Rolls-Royce share price. Here’s what it said…

Out of curiosity, James Beard used artificial intelligence software to see whether it thinks the Rolls-Royce share price is fairly…

Read more »

Finger clicking a button marked 'Buy' on a keyboard
Investing Articles

This FTSE 100 CEO just spent £1m buying 30,000 shares!

Company insiders of this FTSE 100 investing giant have been ‘buying the dip’ with almost £5m worth of shares purchased…

Read more »

Investor looking at stock graph on a tablet with their finger hovering over the Buy button
Investing Articles

With a 10-year annualised return of 26%, this growth stock could be too good to ignore

With consistent demand for its products, Diploma has managed to achieve average returns far above most other FTSE 100 stocks.…

Read more »

Mature black woman at home texting on her cell phone while sitting on the couch
Investing Articles

In 2025, the Marks and Spencer share price has turned £5,000 into…

2025 has been a poor year for the Marks and Spencer share price. However, Edward Sheldon believes that it can…

Read more »