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.

5 things to understand before you start investing

Christopher Ruane lays out a handful of principles he would bear in mind if he was to start investing for the first time today.

Couple working from home while daughter watches video on smartphone with headphones on

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.

It can be exciting thinking about the possible returns of investing in the stock market. That helps explain why some people rush into it and start investing before they really understand what they are doing.

If I was going to begin investing for the first time, here are five things I would like to know.

XXX

1. Costs matter

Some investment trusts charge an annual management fee, often a low-single-digit percentage number. Buying or selling any shares usually also attracts fees. They can also sound low on paper, again in the single-digit percentage range.

But a few percentage points here and a couple of percentage points there can soon add up. The more one trades, the sooner such costs are likely to add up.

I would begin by comparing different share-dealing accounts and Stocks and Shares ISAa to see which one looked most appropriate for my needs.

2. The future is not the past

Past performance can be very helpful when investing. For example, knowing how a business did in the past can help me decide whether its business model looks proven and what sort of seasonality it has.

But past performance is not necessarily a guide to what comes next, even for a proven business with a long history. Fortunes have been lost by investors sinking money into fallen giants, only to see them keep on falling.

3. Chasing yield is a fool’s errand

The dividend yield is the amount one receives each year as dividends as a percentage of the cost of the shares.

For example, Diversified Energy currently has a yield of 16%. If that is sustained, spending £100 on Diversified shares today ought to earn me £16 in dividends annually. Even at a time of high interest rates, that sort of yield grabs my attention.

But dividends are never guaranteed. A common mistake when people start investing is simply to look at yields, without understanding the business concerned. A high yield alone tells me nothing. Instead, I need to understand the business concerned and judge how able I think it will likely be to maintain its shareholder payout.

4. Diversification is simple but important

Many people have their eye on what they think is an amazing share when they start investing. Anyone who has ever heard someone in a pub drone on about how they almost bought Amazon or Tesla shares before the companies grew huge, will have experienced this first-hand.

While some companies do well, others perform terribly. There are lots of ways to form an opinion on what is likely to happen – but there is no way to know for sure ahead of time.

By spreading my eggs over multiple baskets, I can reduce the risk to my portfolio if one share I choose later performs badly.

5. Stay calm

Investing involves risking one’s money. The twists and turns of the stock market can seem exciting – or nerve-racking.

Investing is ultimately about making money. I think a valuable lesson when one starts investing is always to stay calm and try to avoid emotionally driven decision-making.

As legendary investor Warren Buffett says: “When forced to choose, I will not trade even a night’s sleep for the chance of extra profits.”

John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. C Ruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Amazon.com and Tesla. 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 »