How I’d invest £5k using Warren Buffett’s rules

Rupert Hargreaves explains the simple Warren Buffett rules he would use to invest a significant lump sum in stocks and shares today.

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.

Buffett at the BRK AGM

Image source: The Motley Fool

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.

Warren Buffett is widely considered to be one of the best investors of all time. He did not get this position by accident. Over the past seven decades, he has built a vast fortune by following a set of rules, which he continues to use today.

Any investor can follow these rules to improve their investment process. Indeed, I follow some of Buffett’s practices to help me choose investments and reduce the risk of losing money from my choices.

As such, here are the rules I would use from the ‘Oracle of Omaha’ to invest a lump sum of £5,000 today. 

Buffett’s rules for success

The billionaire’s first rule of investing is to avoid losing money. This is easier said than done. Even Buffett has bought investments that ended up costing him. 

But this advice does not mean we should avoid selling stocks at a loss. Instead, Buffett is trying to get across how important it is to avoid corporations at risk of bankruptcy. These include speculative investments such as early-stage mining or oil exploration companies. Early-stage technology enterprises could also incur losses on investors if they struggle to produce a commercial product. 

With this advice in mind, I would avoid investing my lump sum of £5,000 in any companies that may have a chance of running out of cash. This includes small-cap miners, speculative penny stocks and highly-indebted businesses. 

When looking for an investment, one of the first questions Buffett asks himself is whether or not he can understand the enterprise. This is something I will follow as well. Some companies are challenging to understand. That includes how they make money and how they will generate returns for investors.

Even if these enterprises are highly sought after investments, I will avoid them because there is no better way to lose money than buying something I do not understand. This approach has helped me avoid several disasters in the past. These companies were market darlings, but their complex business models were designed to obscure fraudulent activity. 

Invest for the long term

The third and final Buffett rule I would follow to invest a lump sum of £5,000 today is to focus on the long term. The Oracle of Omaha says investors should only ever consider a stock if they plan to hold it for the next 10 years.

This mentality forces me to complete extra work to understand a company and become entirely comfortable holding it in my portfolio. If I know I cannot sell for the next decade, I want to be sure I bought the right stock.

When I have completed enough research to understand the company inside and out, it is easier to hold the investment. Especially through the peaks and troughs of the market cycle.

Rupert Hargreaves 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

Looking for shares to buy as precious metals surge? 3 things to remember!

Gold prices have been on a tear. So has silver. So why isn't this writer hunting for shares to buy…

Read more »

British Pennies on a Pound Note
Investing Articles

Up 27% in 2025, might this penny share still be a long-term bargain?

Christopher Ruane's happy that this penny share he owns has done well in 2025. But it's still cheaper now than…

Read more »

Two employees sat at desk welcoming customer to a Tesla car showroom
Investing Articles

Here’s what a single share of Tesla stock cost in January – and what it’s worth now!

Tesla stock's moved up this year -- and it's had a wild ride along the way. Christopher Ruane explains why…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Rolls-Royce shares have done it again in 2025! But could the party be over?

2025's been another storming year for Rolls-Royce shares -- and this writer missed out! Might it still be worth him…

Read more »

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

Is this the last chance to buy these FTSE 100 shares on the cheap?

Diageo and Barratt Redrow's share prices have tanked. Is this the opportunity investors seeking cheap FTSE 100 shares have been…

Read more »

Young mixed-race woman jumping for joy in a park with confetti falling around her
Investing Articles

Legal & General shares yield a staggering 8.7% – will they shower investors with income in 2026?

Legal & General shares pay the highest dividend yield on the entire FTSE 100. Harvey Jones asks whether there is…

Read more »

A pastel colored growing graph with rising rocket.
Investing Articles

With its 16% dividend yield, is it time for me to buy this FTSE 250 passive income star?

Ithaca Energy’s 16% dividend yield looks irresistible -- but with tax headwinds still blowing strong, can this FTSE 250 passive…

Read more »

Hand of person putting wood cube block with word VALUE on wooden table
Investing Articles

Under £27 now, Shell’s share price looks a huge bargain – here’s why

Shell’s share price is at a major discount to its peers, but Simon Watkins believes it won’t do so for…

Read more »