We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

Discover the FTSE 250 growth share I’m considering to boost my ISA wealth!

I’m thinking of adding this high-performing growth share to my portfolio this November. Fresh data on long-term ISA returns shows why.

| More on:
Portrait Of Senior Couple Climbing Hill On Hike Through Countryside In Lake District UK Together

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.

One of the best ways for investors to target long-term wealth is to consider share investing. That’s my humble opinion, and it’s one that’s backed up by reams of research. It’s why I take every opportunity I can to add a growth or dividend share to my ISA.

Sure, stock markets can be volatile at times. But over the long term the direction is up, as the FTSE 100, S&P 500 and Nikkei‘s recent record highs show. Patient investors can use this to build an enormous nest egg for later in.

XXX

Let’s look at how investing in the stock market can be such a valuable tool to building retirement wealth. I’ll then discuss a top growth share I’m considering adding to my portfolio right now.

Building wealth

The ISA’s one of the most popular products in the UK for saving and for investing. Over time, the difference generated between the Cash ISA and Stocks and Shares ISA can be enormous, as data from Shepherds Friendly shows.

It calculated the return a £293 monthly investment would have generated over time. Here’s what it found:

ISA typeAssumed interest
rate
5-year balance10-year balance15-year balance20-year balance
Stocks and Shares
ISA
5%£20,009£45,687£78,642£120,935
Fixed Rate ISA2.8%£18,891£40,616£65,603£94,339
Cash ISA1.5%£18,267£37,956£59,177£82,050

Reducing risk

It’s my opinion that these hypothetical returns on the Stocks and Shares ISA may actually be looking a little light.

This is because the average annual return on stock market investing ranges 8% and 10%. That’s far higher than the 5% Shepherds Friendly has used.

Still, you can see the enormous shortfall that cash savers can experience compared to stock market investors. Due to the impact of compounding — where your interest earns interest over time — those saving £293 each month would miss out on even larger riches.

On the plus side, the Cash ISA provides a guaranteed return, making it much lower risk. However, share investors can substantially limit the risk they face with a diversified portfolio of growth and dividend shares spanning sectors and regions.

A growth stock on my radar

The Baillie Gifford US Growth Trust (LSE:USA) is one company I’m currently considering for my portfolio. As its name implies, it focuses on growth stocks on the other side of The Pond. It’s delivered a monster 13% average annual return over the last year.

That’s more than double the return for the broader FTSE 250.

The trust’s focus on Wall Street shares leaves it vulnerable to a fall in the US stock market. But other than that it’s pretty well diversified. The 58 holdings it has span multinational companies in the information technology, telecoms, consumer goods and healthcare sectors, among others.

On top of this, the investment trust comprises both public and private companies. So it’s been able to harness the enormous growth potential of hard-to-reach companies like Space X alongside popular growth shares including Nvidia and Amazon.

Royston Wild has no position in any of the shares mentioned. The Motley Fool UK has recommended Amazon and Nvidia. 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

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »