1 way I could start investing with £300

If he had a spare £300 and wanted to start investing in shares for the first time, Christopher Ruane would consider doing it like 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.

pensive bearded business man sitting on chair looking out of the window

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.

If I had some spare money and decided to start investing for the first time, I think one of the things that might be put me off is not knowing where to begin.

Below are some common pitfalls when people start investing – and one way I would seek to avoid falling into them if I had only £300 to invest.

Pitfall 1: greed

Most people invest in the hope of financial return. But greed can be what dooms an investment.

If I owned a cross-section of the stock market overall, I could hopefully benefit over time from any improvement in the broad economy. But I would miss out on the potentially stellar returns of an individual industry pioneer. That greed tempts many people to put their money into speculative companies with unproven business models. Sometimes that turns out well. But it could be a costly mistake even with £300, if I invest in a company with an unrealistic assessment of how it is likely to perform in future.

Pitfall 2: understanding valuation

One way I find companies in which to invest is using a product or service I like a lot then deciding to invest in it. That was part of my rationale for investing in Apple and Google owner Alphabet before.

But a good and even highly profitable business does not necessarily make for a rewarding investment. That is because other investors may also see the potential in a business and rush to buy its shares, pushing up the price. So the shares may be overvalued by the time I buy them. That can mean that, even though my thinking about the business growing fast turns out to be correct, I still lose money on the shares.

Pitfall 3: lack of diversification

The adage against putting all our eggs in one basket is familiar. But when it comes to investing, some people ignore it – potentially putting their whole investment at peril. The temptation can be strong, for example because one is so excited about the prospects for a particular share. Also, while a big portfolio lends itself to being spread across different investments, dealing costs could mean that if I invest only £300, it can be difficult for me to diversify cost effectively.

But risk is risk — and could wipe me out. I think diversification is a critical risk management for an investor, no matter how much or little they have to invest.

I would start investing in an index fund

Those three pitfalls help explain why, if I was to start investing today, I would consider putting the £300 into shares of an index fund that tracks a selection of leading shares, such as the Vanguard FTSE 100 index Unit Trust.

That would not offer me the potential returns of an industry pioneer. But it would expose me to a diversified collection of businesses that by and large ought to move roughly in line with the economy overall. That means I could still lose money if the market overall is overvalued. But I would not need to spend lots of time considering the valuation of individual companies without really knowing yet how to do it. My objective would not be excitement – or even very high financial returns. Instead, I would be focussed on learning about how shares work while trying to manage the risks to my £300.

Christopher Ruane has no position in any of the shares mentioned. Suzanne Frey, an executive at Alphabet, is a member of The Motley Fool’s board of directors. The Motley Fool UK has recommended Alphabet (A shares), Alphabet (C shares), and Apple. 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

With a huge 9% dividend yield, is this FTSE 250 passive income star simply unmissable?

This isn't the biggest dividend yield in the FTSE 250, not with a handful soaring above 10%. But it might…

Read more »

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

With a big 8.5% dividend yield, is this FTSE 100 passive income star unmissable?

We're looking at the biggest forecast dividend yield on the entire FTSE 100 here, so can it beat the market…

Read more »

Business manager working at a pub doing the accountancy and some paperwork using a laptop computer
Investing Articles

Why did the WH Smith share price just slump another 5%?

The latest news from WH Smith has just pushed the the travel retailer's share price down further in 2025, but…

Read more »

ISA coins
Investing Articles

How much would you need in a Stocks & Shares ISA to target a £2,000 monthly passive income?

How big would a Stocks and Shares ISA have to be to throw off thousands of pounds in passive income…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

£10,000 invested in Diageo shares 4 years ago is now worth…

Harvey Jones has taken an absolute beating from his investment in Diageo shares but is still wrestling with the temptation…

Read more »

Investing Articles

Dividend-paying FTSE shares had a bumper 2025! What should we expect in 2026?

Mark Hartley identifies some of 2025's best dividend-focused FTSE shares and highlights where he thinks income investors should focus in…

Read more »

piggy bank, searching with binoculars
Dividend Shares

How long could it take to double the value of an ISA using dividend shares?

Jon Smith explains that increasing the value of an ISA over time doesn't depend on the amount invested, but rather…

Read more »

Businessman hand stacking money coins with virtual percentage icons
Investing Articles

£5,000 invested in Tesco shares 5 years ago is now worth this much…

Tesco share price growth has been just part of the total profit picture, but can our biggest supermarket handle the…

Read more »