Why Warren Buffett Avoids These 3 Types of Companies

Words of wisdom from Warren Buffett on what NOT to invest in.

Minimising your losers is an absolutely crucial part of successful investing. All investors make mistakes, but if you can reduce the number of ‘unforced errors’, the ‘winners’ you hit will really count.

Legendary investor Warren Buffett has offered many insights over the years into what he invests in and why, but, equally, he’s had much to say about what he doesn’t invest in.

Here are three tips from Buffett that could help make you a more successful investor.

Tip #1

Buffett has what he calls a ‘circle of competence’ — a cumulative knowledge of a number of industries built up over the years — and he largely sticks to what he understands. His advice to investors starting out is to begin developing a circle of competence by focusing on “simple, understandable, strong businesses.”

As an example, Buffett has invested in Coca-Cola for many decades. This is a simple, understandable and strong business — and it’ll be doing fundamentally the same thing in five, 10 or 20 years’ time as it’s doing now.

Buffett avoids investing outside his circle of competence. There may be times when you see share prices flying in some industry you don’t understand and other investors coining it. Don’t let envy tempt you away from your circle of competence. It can often end in tears, as it did for many investors in the dot.com bust.

Tip #2

Some businesses are simple and easy to understand but not strong. Companies that require large amounts of capital investment, but which have no durable competitive advantage (such as a monopoly position or brand strength) and thus no pricing power, aren’t strong businesses.

Buffett has singled out commercial airlines as a particularly pernicious example: “The airline industry’s demand for capital ever since that first flight [by Orville Wright] has been insatiable. Investors have poured money into a bottomless pit …”

Of course, some investors have made money by buying and selling airline shares at the right times over the decades. But for Buffett, whose ideal holding period for a stock is “forever“, capital intensive businesses with no durable competitive advantage make no sense as an investment.

Tip #3

The third ‘avoid’ tip of Buffett’s I want to highlight can apply to any company in any industry.

Buffett has said: “We’ll never buy a company when the managers talk about EBITDA [earnings before interest, tax, depreciation and amortisation]. There are more frauds talking about EBITDA. That term has never appeared in the annual reports of companies like Wal-Mart, General Electric, or Microsoft. The fraudsters are trying to con you or they’re trying to con themselves.”

Buffett’s partner Charlie Munger has been equally scathing: “I think that, every time you saw the word EBITDA [earnings], you should substitute the word ‘bullshit’ earnings.”

I might not go as far as Buffett and Munger in never buying a company where directors talk about EBITDA. For example, I will forgive a mention of the term if they also speak upfront and transparently about cash flow. However, routinely avoiding companies where management attempts to make EBITDA the primary measure and focus would doubtless save investors many disasters.

G A Chester has no position in any shares mentioned. The Motley Fool owns shares of General Electric and Microsoft.

More on Investing

dividend stocks are a good way to earn passive income
Investing

3 Unbelievable Buying Opportunities Investors Should Jump On Right Now

These Canadian stocks are among the most unbelievable buying opportunities I've come across of late. Here's why.

Read more »

stocks climbing green bull market
Investing

1 Canadian Stock Ready to Surge Into 2026

Buy this top Canadian stock to capitalize on the government’s growth plan for the country and capture potentially significant capital…

Read more »

Man holds Canadian dollars in differing amounts
Dividend Stocks

Put $10,000 to Work to Earn $1,219 in Annual Passive Income

Do you have $10,000 for passive TFSA income? Manulife and Firm Capital can deliver reliable, tax-free cash flow without chasing…

Read more »

senior relaxes in hammock with e-book
Dividend Stocks

2 Easy Canadian Stocks to Buy With $1,500 Right Now

A $1,500 capital investment is enough to buy two easy Canadian stocks and build a high-performance portfolio.

Read more »

Quantum Computing Words on Digital Circuitry
Tech Stocks

Quantum Computer Company Xanadu Is Set to Go Public: Should Investors Buy the ‘IPO’?

Canada's very Xanadu is going public. Will it go parabolic like IonQ (NYSE:IONQ) did?

Read more »

delivery truck leaves shipping port terminal
Dividend Stocks

1 Outstanding TSX Stock Down 33% to Buy and Hold Forever

Add this TSX stock to your self-directed investment portfolio and capitalize on the temporary pullback that has made it an…

Read more »

ETFs can contain investments such as stocks
Dividend Stocks

3 Reliable ETFs to Deliver Dividends to Your TFSA

Want simple TFSA dividends? These three Canadian ETFs offer easy diversification and income you can hold for years.

Read more »

Concept of multiple streams of income
Dividend Stocks

How to Upgrade Your Dividend Portfolio for 2026

2026 is just a few days away. For those Investors looking to seriously upgrade their dividend portfolio, now is the…

Read more »