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.

I think this 1 thing is the secret to Warren Buffett’s success

This essential quality Warren Buffett is renowned for could help you become a better investor.

You’re reading a free article with opinions that may differ from The Twelfth Magpie’s Premium Investing Services. Become a member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn more, and get a free 'Best Buy Now' stock!.

Many factors have contributed to making Warren Buffett one of the world’s most successful investors ever. However, I think his biggest secret — and one from which we can all benefit as investors — is a fundamental one. Honesty.

Buffett possesses it in abundance. Indeed, he’s renowned for it. As his official biographer Alice Schroeder wrote of one instance: “A small forest of trees was felled in media coverage of Buffett’s honesty.”

Should you buy Rolls Royce shares today?

Before you decide, please take a moment to review this report first. Despite ongoing uncertainties from US tariffs to global conflicts, Mark Rogers and his team believe many UK shares still trade at substantial discounts, offering savvy investors plenty of potential opportunities to learn about.

That’s why this could be an ideal time to secure this valuable research – Mark’s analysts have scoured the markets to reveal 5 of his favourite long-term ‘Buys’. Please, don’t make any big decisions before seeing them.

Here, I’m going to focus on how I think honesty is an essential part of his highly successful investing process.

Weighing opportunities

Many people find an interesting stock idea, study the valuation, look at the outlook for earnings and dividends, and so on. Finally, they might get round to asking “what could go wrong?” although when I read stock discussion forums, I see plenty of investors who haven’t considered the question and are resistant to doing so.

In contrast, Buffett’s honesty means he always considers what could go wrong. Indeed, as his biographer has told us, “the first step in Warren’s investing process is always to say: what is the odds that this business could be subject to any kind of catastrophe risk that could make it just fail?”

Honestly weighing an investment opportunity demands we look as much at the negative potential as the positive. This is why, at the foot of this article, you’ll find a paragraph that concludes: “Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.”

The ‘too hard’ pile

I think a big reason why some investors are resistant to considering a full range of insights is a fear of finding the business and/or its valuation too complicated. However, you’d be in good company.

Buffett has three categories when evaluating a stock: yes/no/too hard. His partner Charlie Munger has said: “We throw almost all decisions into the too hard pile, and we just sift for a few decisions that we can make that are easy.”

There’s nothing wrong with having the honesty to say “too hard” — or, in Buffett’s phrase, “outside my circle of competence.” In fact, being able to admit you don’t understand a business or its valuation is a big positive.

Mistakes

Buffett only invests in stocks he understands, because “I want to be able to explain my mistakes.” He believes if he’s honest with himself and others about his mistakes, he’s more likely to learn from them. He’s often brutally honest. His mea culpas to his shareholders are typically a full and frank explanation of how and why he got something wrong.

Everyone gets things wrong — it’s part of the process and practice of investing — but the investor who ignores his or her mistakes, or is always trying to blame someone or something else for them, is doomed to go on repeating them, never to become a better investor.

Honesty is the best policy

In summary, I think Buffett’s honesty enables him to make a true assessment of an investment opportunity (pros and cons), to admit when he finds a stock too hard to understand, and to acknowledge and learn from any mistakes he makes. I reckon these have been key elements in Buffett’s success, and that for him — and us — “honesty is the best policy.”

G A Chester 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

Female student sitting at the steps and using laptop
Investing Articles

Are Lloyds shares 23% undervalued?

Lloyds shares have fallen in value since a high reached earlier this year. Could this be a sign the FTSE…

Read more »

happy senior couple using a laptop in their living room to look at their financial budgets
Investing Articles

Here’s why Legal & General is still one of the UK’s most popular SIPP buys

So far in 2026, UK SIPP investors have largely stuck to the same group of favourite FTSE 100 stocks. And…

Read more »

Mature people enjoying time together during road trip
Investing Articles

How have Aviva shares become a dividend juggernaut? 5 reasons why

With a long record of dividend growth and enormous yields, Aviva's shares are in high demand with income investors. Can…

Read more »

Middle aged businesswoman using laptop while working from home
US Stock

This is the most undervalued stock in the Dow Jones index

Jon Smith points out a Dow Jones stock with a price-to-earnings ratio below 10, with strong recent earnings that could…

Read more »

Black woman using smartphone at home, watching stock charts.
Investing Articles

£1,000 buys 268 shares in this dirt-cheap dividend stock that’s on fire in 2026

This dividend stock offers the winning combination of growth, income, and value. Could it be worth considering for an ISA…

Read more »

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

Here’s the REIT I’ve bought for huge and sustainable passive income

This REIT has raised annual dividends for almost 30 years! Royston Wild reveals exactly why it's his favourite UK passive…

Read more »

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

How to target a £250,000 SIPP, starting at 50

Although it’s better to start investing earlier, James Beard reckons there’s still time to build a chunky SIPP, even for…

Read more »

piggy bank, searching with binoculars
Investing Articles

2 UK penny stocks to check out in June

Ben McPoland looks at a pair of promising penny stocks, one of which carries a price target that's 147% higher…

Read more »