If I’d put £20,000 into a FTSE 100 tracker a year ago, here’s what I’d have now

The FTSE 100 is having a great year so far this year, and it seems overdue. What’s the best way to benefit from long-term gains?

| More on:

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.

Young Caucasian woman with pink her studying from her laptop screen

Image source: Getty Images

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.

I’m tempted by the thought of putting my cash into a FTSE 100 tracker fund, and then just sitting back and watching.

The FTSE 100 is up 11.7% in the past 12 months, so it seems like a good idea. But it’s been a good year, after a few pretty bad ones.

Still, over the past 20 years (which includes the pandemic crisis, and a load of global economic woes), we’ve seen an average annualised FTSE 100 return of 6.9%.

Over the long term, I reckon that would be pretty good for no effort on my part.

Tracker fund

What might a full year’s Stocks and Shares ISA allowance of £20,000 be worth today, if I’d invested it 12 months ago?

Here’s what the share price of the iShares Core FTSE 100 UCITS ETF (LSE: ISF) looks like over time:

Scary name

Don’t be put off by that complicated long name, as it’s a popular FTSE 100 tracker. The ‘ETF’ part means it’s an exchange-traded fund. And all that means is we can buy and sell shares on the stock market whenever we like, just like any other stock. What could be better?

Anyway, over the past 12 months, the share price is up 11.1%. It’ll always vary a bit from the index, as no tracker can be 100% precise. There are charges to cover too, though they’re modest. And the vagaries of people buying and selling will move it around too.

So that gain alone would have turned £20,000 to £22,220.

Dividends too

But most FTSE 100 companies also pay dividends, and the iShares FTSE 100 is on a forecast 3.8% dividend yield this year.

It could add £762 to the pot.

Now, I must raise some cautions here. This ETF invests its cash across a wide range of the top FTSE 100 stocks. That provides safety in diversification, which I rate as essential for investors.

But even with that, the UK stock market still goes through bad patches. The average Stocks and Shares ISA lost 13.3% in the 2019-20 year. And I think we got off very lightly from the 2020 stock market crash with such a quick rebound. There have been longer ones, and I expect we’ll see more.

Starting out

But the longer we invest in the UK stock market, the better and less volatile our returns are likely to be. At least, that’s what nearly 150 years of experience has shown us. It could change in the future, but I think it’s unlikely.

Going for a FTSE 100 ETF like the iShares one is, I think, a great approach for a new investor to consider.

It’s straightforward, and avoids all the research and head-scratching needed to dig out and buy our own individual shares.

Doing all that for me is part of the fun. But we can learn and do as much, or as little, as we want in our next ISA year. Or the one after that.

Alan Oscroft 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

Investing Articles

Is Alphabet still one of the best shares to buy heading into 2026?

The best time to buy shares is when other investors are seeing risks. Is that the case with Google’s parent…

Read more »

Investing Articles

Could the Barclays share price be the FTSE 100’s big winner in 2026?

With OpenAI and SpaceX considering listing on the stock market, could investment banking revenues push the Barclays share price higher…

Read more »

Investing Articles

Will the Nvidia share price crash in 2026? Here are the risks investors can’t ignore

Is Nvidia’s share price in danger in 2026? Stephen Wright outlines the risks – and why some might not be…

Read more »

Middle-aged white man pulling an aggrieved face while looking at a screen
Growth Shares

I asked ChatGPT how much £10,000 invested in Lloyds shares 5 years ago is worth today? But it wasn’t very helpful…

Although often impressive, artificial intelligence has its flaws. James Beard found this out when he used it to try and…

Read more »

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

Did ChatGPT give me the best FTSE stocks to buy 1 year ago?

ChatGPT can do lots of great stuff, but is it actually any good at identifying winning stocks from the FTSE…

Read more »

Surprised Black girl holding teddy bear toy on Christmas
Investing Articles

Who will be next year’s FTSE 100 Christmas cracker?

As we approach Christmas 2025, our writer identifies the FTSE 100’s star performer this year. But who will be number…

Read more »

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

I asked ChatGPT for an 8%-yielding passive income portfolio of dividend shares and it said…

Mark Hartley tested artificial intelligence to see if it understood how to build an income portfolio from dividend shares. He…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

How much do you need in an ISA to target £8,333 a month of passive income?

Our writer explores a potential route to earning double what is today considered a comfortable retirement and all tax-free inside…

Read more »