Stock market crash: how I’d aim to turn £100 a week into a million

I think investing modest amounts on a regular basis after the stock market crash could lead to a surprisingly large portfolio in the long run.

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 recent stock market crash could provide a range of attractive buying opportunities for long-term investors. A number of high-quality businesses are currently trading at lower prices than they have done for many years. They could make gains as the economic outlook improves.

Therefore, investing modest amounts on a regular basis could pay off over the long run. It could even allow you to obtain a portfolio valued at over a million in the coming years.

Buying opportunities after the stock market crash

The past performance of indexes such as the FTSE 100 shows that the best time to buy shares is often after a stock market crash. At such times, valuations across multiple industries are often at very low levels relative to historic averages. This can mean that there’s scope for relatively high capital gains in the long run as the economic outlook improves.

Clearly, it may take some time for today’s undervalued shares to deliver impressive recoveries. Risks such as Brexit and coronavirus look set to remain in place in the coming months. They could negatively impact on investor sentiment and cause a further downturn in the short run.

However, by taking a long-term view after a stock market crash, you could follow other investors from previous downturns to obtain impressive returns. Despite experiencing crises such as the 1987 crash, the dot com bubble and the global financial crisis, the stock market has produced high single-digit annualised total returns in recent decades. Buying undervalued shares could mean that your portfolio generates even higher returns as they recover.

Making a million with a modest regular investment

Of course, many investors may be more risk averse following the recent stock market crash. They may decide to invest in lower-risk assets such as cash or bonds to avoid potential paper losses in the near term. However, even assuming a similar rate of return to that achieved by the stock market in the past, you could build a surprisingly large portfolio by investing regularly in shares.

For example, a £100 weekly investment that achieves the FTSE 100’s historic 8% total return per annum would be worth £1m within 35 years. Many stocks are now trading at low prices . And that could lead to above-average returns. So now could be the right time to start building a portfolio that can provide a passive income in older age.

Certainly, their returns won’t be smooth. Over the long run, share prices are likely to be negatively impacted by more than one stock market crash. So investing regularly throughout a range of market conditions is important. By spreading your risk across a wide range of businesses and holding for the long run, you could turn an affordable regular investment into a significant amount of capital.

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

Sunrise over Earth
Investing Articles

Meet the ex-penny share up 109% that has topped Rolls-Royce and Nvidia in 2025

The share price of this investment trust has gone from pennies to above £1 over the past couple of years.…

Read more »

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

1 of the FTSE 100’s most reliable dividend stocks for me to buy now?

With most dividend stocks with 6.5% yields, there's a problem with the underlying business. But LondonMetric Property is a rare…

Read more »

Investing Articles

Is 2026 the year to consider buying oil stocks?

The time to buy cyclical stocks is when they're out of fashion with investors. And that looks to be the…

Read more »

ISA coins
Investing Articles

3 reasons I’m skipping a Cash ISA in 2026

Putting money into a Cash ISA can feel safe. But in 2026 and beyond, that comfort could come at a…

Read more »

US Stock

I asked ChatGPT if the Tesla share price could outperform Nvidia in 2026, with this result!

Jon Smith considers the performance of the Tesla share price against Nvidia stock and compares his view for next year…

Read more »

Investing Articles

Greggs: is this FTSE 250 stock about to crash again in 2026?

After this FTSE 250 stock crashed in 2025, our writer wonders if it will do the same in 2026. Or…

Read more »

Investing Articles

7%+ yields! Here are 3 major UK dividend share forecasts for 2026 and beyond

Mark Hartley checks forecasts and considers the long-term passive income potential of three of the UK's most popular dividend shares.

Read more »

Hand is turning a dice and changes the direction of an arrow symbolizing that the value of an ETF (Exchange Traded Fund) is going up (or vice versa)
Investing Articles

2 top ETFs to consider for an ISA in 2026

Here are two very different ETFs -- one set to ride the global robotics boom, the other offering a juicy…

Read more »