Found a share you love? Don’t buy until you’ve answered this vital question

If your new favourite stock doesn’t do this, is it really worth owning?

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.

Stock-picking requires time and a willingness to thoroughly research companies before buying them. Even Warren Buffett — generally regarded as the best stock-picker that’s ever lived — believes the vast majority of us shouldn’t be active investors. Those who enjoy the challenge, however, should read on.

The big question

Reading through MoneyWeek executive editor John Stepek’s (highly recommended) new book, The Sceptical Investor, I’m reminded of what I believe is one of the most important questions to ask whenever you’re considering purchasing a new stock.

Regardless of which company we’re talking about (Stepek uses mining giant BHP Group in his example), you need to ask yourself whether it’s going to outperform the benchmark.

While there are no guarantees in investing, if you can’t at least state why you think this is going to happen, you arguably shouldn’t be buying said stock. To answer that question, however, you first need to select an appropriate benchmark.

In his example, Stepek reflects that it can make sense to use the FTSE 100 (BHP is, after all, a constituent of the index) and then ask yourself what it is about BHP that will allow it to outperform the market’s top tier.

A response might be that miners are likely to do well going forward (perhaps due to a commodities bull market) and you don’t want your investment to be impacted by the woes of other companies in unrelated sectors. Since there are plenty of large-caps that aren’t necessarily good investments right now, there’s a logic to that.

But if you think the mining sector will outperform, then a better benchmark would surely be something like an investment trust focused on miners, he suggests.

So now a different question presents itself: Why buy BHP over a fund, particularly as the latter helps to lower risk through diversification?

To be clear, Stepek doesn’t rule out buying BHP but he does stress the importance of matching a bullish call with the “correct financial instrument” — be it in the form of individual shares or something else — if you’re going to make the most money. 

What to do instead…

If, after consideration, you feel your new favourite stock is unlikely to outperform the (most appropriate) benchmark, then it makes sense to look into ways of investing in the benchmark instead.

Since the existence of a specialist fund for particular sectors isn’t a given and the FTSE 100 could still be the best comparison, I’ll stick to focusing on exchange-traded funds here.

As they sound, these are low-cost, passive vehicles that help an investor generate the same return as the market, minus a bit of tracking error and the obligatory fees. The iShares Core FTSE 100 and the Vanguard FTSE 100 UCITS ETF are examples.

Another positive from selecting these funds is that they pay dividends, thus allowing investors to receive income for less risk than if they bought shares in specific companies instead. The funds mentioned above offer yields of 4.24% and 4.73%, respectively — lower than BHP, but still worth having. 

Bottom line? Taking the time to question whether a particular share will truly outperform its benchmark might seem (irritatingly) sensible to some, but those committed to generating the best returns over the long term should acknowledge this is a vital step to take. 

Paul Summers 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

ChatGPT thinks these are the 5 best FTSE stocks to consider buying for 2026!

Can the AI bot come up trumps when asked to select the best FTSE stocks to buy as we enter…

Read more »

Investing For Beginners

How much do you need in an ISA to make the average UK salary in passive income?

Jon Smith runs through how an ISA can help to yield substantial income for a patient long-term investor, and includes…

Read more »

Investing Articles

3 FTSE 250 shares to consider for income, growth, and value in 2026!

As the dawn of a new year in the stock market approaches, our writer eyes a trio of FTSE 250…

Read more »

Warren Buffett at a Berkshire Hathaway AGM
Investing Articles

Want to be a hit in the stock market? Here are 3 things super-successful investors do

Dreaming of strong performance when investing in the stock market? Christopher Ruane shares a trio of approaches used by some…

Read more »

Two white male workmen working on site at an oil rig
Investing Articles

The BP share price has been on a roller coaster, but where will it go next?

Analysts remain upbeat about 2026 prospects for the BP share price, even as an oil glut threatens and the price…

Read more »

Investing Articles

Prediction: move over Rolls-Royce, the BAE share price could climb another 45% in 2026

The BAE Systems share price has had a cracking run in 2025, but might the optimism be starting to slip…

Read more »

Tesla car at super charger station
Investing Articles

Will 2026 be make-or-break for the Tesla share price?

So what about the Tesla share price: does it indicate a long-term must-buy tech marvel, or a money pit for…

Read more »

Portrait of elderly man wearing white denim shirt and glasses looking up with hand on chin. Thoughtful senior entrepreneur, studio shot against grey background.
Investing Articles

Apple CEO Tim Cook just put $3m into this S&P 500 stock! Time to buy?

One household-name S&P 500 stock has crashed 65% inside five years. Yet Apple's billionaire CEO sees value and has been…

Read more »