Boring is beautiful: how to invest like Buffett

Here's Buffett's not-so-secret secret: a company doesn't need to be thrilling to make you rich, it needs a moat. Not the medieval kind, though the logic holds: something that keeps competitors out and lets the castle get on with business undisturbed. A brand, a network, a habit customers can't quit. People reach for a Coca-Cola on a bad day and a good one. They pull out their American Express card without a second thought. They buy insurance from the likes of Chubb because life is unpredictable, and that's precisely the risk insurers are paid to carry. None of it makes headlines. All of it makes money, quarter after quarter, whether markets are calm, cheering or panicking.

That steadiness is what makes buy-and-hold investing work, and the maths backs it up. Every trade hits pause on compounding, hands a slice to fees or spreads, and risks selling a winner just before its best years. Buffett's answer to "when do you sell?" is essentially never, and it isn't sentimentality, it's arithmetic. Year ten of holding a great business tends to beat year one, because a decade of reinvested dividends has let the base grow fat in the meantime. Trying to trade is trying to outguess a market that answers to no one. Sitting still lets the business get on with the job investors are paying it to do.

Using each company's own long-run average annual return, with dividends reinvested, here's roughly what a monthly habit could grow into over time:

Buffett has long argued "never invest in a business you cannot understand", so here is a simple outline of what these companies do.

American Express issues the card in your wallet, but crucially, it also runs the network the payment travels down. That means it gets paid twice on every swipe: once by the cardholder, and once by the merchant. Its real edge is its customer base, wealthier, stickier, and less likely to stop spending the moment things get rocky.

Coca-Cola barely makes Coca-Cola any more. It sells the concentrate and syrup, licenses the brand to bottlers around the world, and lets them deal with the factories, fridges and delivery fleets. Coke's job is simpler, and arguably harder: it just has to keep you wanting one.

Chubb is the world's largest publicly listed property and casualty insurer by underwriting income. It insures homes, cars, businesses and the odd superyacht, and makes money two ways: by charging more in premiums than it pays out in claims, and by investing that premium cash while it sits in reserve waiting for a claim that may never come, the "float", arguably one of the cleverest mechanisms in finance.

A note on the figures above: they're illustrative, built from each stock's historical average annual return with dividends reinvested and applied evenly across the period, not an exact month-by-month price series. Past performance is not a guarantee of future results.

Companies mentioned in this article: American Express (NYSE: AXP), Coca-Cola (NYSE: KO), Chubb Limited (NYSE: CB)