Why A Margin Of Safety Is Crucial When Buying Shares

The relationship between risk and reward matters the most. Here’s 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.

For investors, the two major parts of investing that really matter are risk and reward. That’s because investing is all about making money, so risk is how much you could lose and reward is how much you could gain. Sounds simple, but a mistake made by many investors through the years is to think more about one or the other, and this can have a disastrous effect on long term returns.

Fear/Greed

In fact, most investors tend to favour one or the other depending on the level of the stock market and the economic outlook at the time. When things are relatively upbeat, such as at the moment, thoughts are very much focused on potential rewards, with investors thinking about why a company could improve its performance and continue to rise at a rapid rate.

Meanwhile, when stock markets are low and the economic outlook is poor, as they were during the credit crunch in 2009, risk is a bigger consideration and most investors will focus on how much they could lose rather than how much they could gain.

In other words, investors are usually greedy or fearful, with little room in between.

Margin Of Safety

However, the optimum way to balance the emotions of fear and greed that come so naturally to all investors is to focus on a company’s margin of safety. This is a very simple concept that essentially equates the potential for gains and losses in a company’s valuation.

In other words, if the outlook for a company or for its sector is relatively negative and yet the company’s shares are trading on a high valuation, there is a narrow margin of safety. Likewise, if the outlook is positive or neutral and the company has a low valuation, its margin of safety is wide and its shares could be worth buying.

Clearly, there is an element of uncertainty regarding any company’s future, but the idea of focusing on its margin of safety is to assess whether the market is pricing in growth or decline (or something in between). Then, it is possible to unearth undervalued opportunities that could become additions to your portfolio.

Subjective

Of course, how to implement the concept of a margin of safety is highly subjective. In fact, there is no one accepted method — rather, it acts as a useful check on your emotions, which can be unreliable at best.

So, whether you wish to focus on metrics such as price to earnings, price to book or free cash flow, or look at a company’s forecasts or its financial standing, any (or all) of these areas could help you to decide how wide a margin of safety is on offer.

While a margin of safety is very much an intangible thing, it can bring a degree of logic and clarity to the investment decision making process. Although it’s not a guarantee of improved portfolio performance, it should at least provide a sound and logical route to clearer decision making over the long term.

Peter

More on Investing Articles

UK money in a Jar on a background
Investing Articles

A SIPP seems to offer investors free money – is there a catch?

This writer doesn't believe in magic money trees, but does see the offer of tax relief within a SIPP as…

Read more »

Middle-aged white man wearing glasses, staring into space over the top of his laptop in a coffee shop
Investing Articles

Here’s what £10,000 invested in Greggs shares a year ago’s worth now

Given Greggs large shop network and simple business formula, could owning the shares help this writer build wealth? Maybe --…

Read more »

UK coloured flags waving above large crowd on a stadium sport match.
Investing Articles

Recent BT share price performance is jaw-dropping but can it continue?

Harvey Jones is stunned by how well the BT share price has weathered recent stock market volatility. Can the FTSE…

Read more »

A senior man using hiking poles, on a hike on a coastal path along the coastline of Cornwall.
Investing Articles

Is the stock market correction a once-in-a-decade chance to target a million-pound SIPP?

After recent volatility Harvey Jones can see plenty of value FTSE 100 stocks to help investors build wealth in a…

Read more »

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

How to target a £10k annual income from just one year’s £20,000 Stocks and Shares ISA allowance

Today is the start of the new financial year giving us all a a fresh Stocks and Shares ISA allowance.…

Read more »

Rolls-Royce's Pearl 10X engine series
Investing Articles

Rolls-Royce shares have gone nowhere this year. Is that a warning sign?

Rolls-Royce shares stand within spitting distance of where they began the year. Has the company's long run of strong share…

Read more »

Tesla building with tesla logo and two teslas in front
Investing Articles

£5,000 invested in Tesla stock on Christmas Eve is now worth…

Tesla stock is stuck in reverse at the moment. This year, it has fallen by around 15%. Is there potential…

Read more »

Close-up image depicting a woman in her 70s taking British bank notes from her colourful leather wallet.
Investing Articles

2 UK dividend stocks to consider buying in April

High-quality established businesses with reliable cash flows often make for great dividend stocks. Here are two for investors to take…

Read more »