Why has Warren Buffett used this free research resource for decades to choose shares?

Celebrated investor Warren Buffett has been using a free research resource for decades to help him pick shares. Our writer explains why.

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.

Fans of Warren Buffett taking his photo

Image source: The Motley Fool

Legendary investor Warren Buffett is well-known for being one of the most successful stock pickers in history. But some of his techniques in choosing shares to buy are surprising — surprisingly simple.

In fact, there’s one thing Warren Buffett does when choosing shares that I and most other investors can do easily, for free. 

Reading research

Buffett is known as a voracious reader. He spends the majority of his working day reading, which gives him an informational advantage over many investors in the stock markets.

Back in 2011, he bought shares in IBM. That didn’t turn out to be one of his more successful holdings. But what interests me about the investment decision was how Buffett described the process of making it. In his 2011 shareholder letter, Buffett wrote, “I was late to the IBM party. I have been reading the company’s annual report for more than 50 years, but it wasn’t until a Saturday in March last year that my thinking crystallized. As Thoreau said, “It’s not what you look at that matters, it’s what you see.

That’s right — Warren Buffett had been reading IBM’s annual report for over half a century. He hadn’t been buying its shares, he hadn’t had a position in the company, but still he had been ploughing through IBM reports. Here he was, on a weekend in his eightieth year, doing the same thing and finally what he saw led him to decide it was time to initiate a position in the company.

Understanding Warren Buffett’s investment logic

Why on earth would Buffett spend so much time across many decades reading the annual report of a company in which he wasn’t a shareholder?

I think there are probably multiple explanations for this, which help give an understanding of Buffett’s investment logic. First, he always suspected IBM might turn out to be a good investment at some point, so it merited further investigation. After all, it was one of the US’s leading companies. So he wanted to learn more about it.

Secondly, he desired to expand his circle of competence. Warren Buffett emphasises the importance of only investing inside one’s circle of competence. One way to expand one’s circle of competence is reading a company’s annual report in detail.

Thirdly, I think Buffett sees value in reading a lot of company annual reports to gain a broad understanding of how the economy is performing. In the UK, for example, companies such as Tesco, Unilever, Barclays, Greggs, and Go-Ahead could all give me some understanding of broader economic trends in their reporting. Even though I don’t own shares in them, I could still benefit from reading their reports.

Applying the Warren Buffett approach – for free

The great news is that I can follow Warren Buffett’s approach here for free. Most companies publish their annual reports online. Some will send out paper copies free of charge to investors who are considering buying their shares.

That is a treasure trove of information. Reading diverse information sources, learning more, and thinking hard about how to act on the information has been integral to Warren Buffett’s success as an investor. Fortunately, I can take the same approach without needing to spend a fortune.

Christopher Ruane has no position in any of the shares mentioned. The Motley Fool UK has recommended Barclays, Tesco, and Unilever. 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

Picture of an easyJet plane taking off.
Investing Articles

£10,000 invested in easyJet shares 4 weeks ago is now worth…

It's been a crazy month for easyJet shares. Here's what would have happened to an investor's £10,000 stake put to…

Read more »

CEO Mark Zuckerberg at F8 2019 event
Investing Articles

Down 31%, is this a rare chance to buy Meta stock for my ISA cheaply?

After rising to near $800 in 2025, Meta stock has pulled back to around $550. Edward Sheldon looks at whether…

Read more »

Santa Clara offices of NVIDIA
Investing Articles

18% off its peak, is Nvidia stock now attractively priced?

Nvidia stock has given up almost a fifth of the price it commanded at its peak over the past year.…

Read more »

Aston Martin DBX - rear pic of trunk
Investing Articles

The Aston Martin share price destruction helps illustrate 5 common investing mistakes!

The Aston Martin share price has been a disaster for investors. Christopher Ruane highlights a handful of lessons we can…

Read more »

DIVIDEND YIELD text written on a notebook with chart
Dividend Shares

How this stock market correction can help boost a second income by 25%

Jon Smith explains how rising dividend yields across some existing income shares can be seen as an opportunity to grow…

Read more »

Middle-aged Caucasian woman deep in thought while looking out of the window
Investing Articles

Considering a SIPP? Today’s market could provide an excellent opportunity to start

Mark Hartley breaks down the benefits of using a SIPP for retirement, and how current market conditions could offer a…

Read more »

Calendar showing the date of 5th April on desk in a house
Investing Articles

Looking for last-minute ISA ideas? Check out these UK stocks before April 3

Easter bank holidays mean the deadline to put cash into a Stocks and Shares ISA might be closer than UK…

Read more »

A senior man and his wife holding hands walking up a hill on a footpath looking away from the camera at the view. The fishing village of Polperro is behind them.
Investing Articles

£20k in a Stocks & Shares ISA? Here’s how to target a £3,854 monthly passive income

Royston Wild explains how Stocks and Shares ISA investors can target a huge passive income -- and reveals a top…

Read more »