Jasmine Birtles
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What Is Value Investing? A Beginner’s Guide
Ruby Layram
16th Jul 2026
Value investing is a popular investing strategy that involves buying shares in good companies for less than they’re actually worth, then being patient while the rest of the market catches up. It’s the strategy that made Warren Buffett one of the richest people on the planet, and it’s a lot simpler than it sounds.
In this guide, we’ll break down exactly what value investing is, where it comes from, the key ideas and numbers behind it, and how you could start applying it to your own portfolio, without needing to be a City analyst.
Value Investing Definition
Value investing is an investment strategy that involves looking for shares trading for less than their true, underlying worth (their “intrinsic value”), and buying them at that discount.
Instead of trying to predict which way a share price will jump next week, a value investor asks a much calmer question: what is this whole business actually worth, based on its profits, assets and future prospects, and is the market currently selling it for less than that?
If the answer is yes, a value investor buys and waits, on the assumption that the market will eventually recognise the company’s true worth and the share price will catch up.
It’s a bit like spotting a £50 coat with a £30 price tag in a sale, you’re not betting on the coat becoming more fashionable, you’re just recognising it was underpriced to begin with.
Where Does Value Investing Come From?
Value investing was developed by Benjamin Graham, an economist and investor who taught at Columbia Business School in the 1920s and 30s and wrote two hugely influential books, Security Analysis and The Intelligent Investor.
Graham’s big idea was that shares aren’t just abstract numbers ticking up and down on a screen, each one represents a real slice of a real business, and that business has a real, calculable value, separate from whatever mood the stock market happens to be in on any given day.
Graham’s most famous student was Warren Buffett, who studied under him and went on to build Berkshire Hathaway into one of the most successful investment companies in history.
Buffett refined Graham’s approach by putting more weight on the quality of a business, its brand, its competitive advantages, its management, rather than focusing purely on cheap statistics.
Between them, Graham and Buffett turned value investing into the most famous, and arguably most successful, long-term investing philosophy around.
How Value Investing Works
Value investing rests on two core ideas: working out what a company is really worth, and only buying it with a decent cushion built in for when you get that estimate wrong. Here’s what that means in practice.
Intrinsic Value
Intrinsic value is an estimate of what a company is really worth, based on its fundamentals (its profits, cash flow, assets and growth prospects), rather than its current share price.
Investors calculate it in different ways: some estimate the cash a business will generate over its lifetime and work out what that’s worth in today’s money, others look at simpler measures like a company’s earnings or the value of its assets on the balance sheet.
There’s no single “correct” formula, and reasonable investors can land on different numbers, but the goal is always the same, a considered, independent view of what the business is worth, separate from what the market currently says it’s worth.
Margin of Safety
Because every estimate of intrinsic value involves some guesswork, value investors build in a “margin of safety”- they only buy when the share price sits well below their estimate of what it’s worth, not just slightly below it.
If you calculate a company is worth £10 a share, you might only buy at £7 or £8, so that even if your estimate turns out to be a bit optimistic, you’ve still bought at a fair price. Buffett has described this as the three most important words in investing, it’s essentially a buffer against being wrong.
Value Investing vs Growth Investing
You’ll often see value investing contrasted with growth investing, and it’s a useful distinction to understand.
Growth investors focus on companies expected to grow their profits quickly, often newer, innovative businesses, and are usually happy to pay a higher price today for that expected future growth.
Value investors, on the other hand, look for established businesses that the market has, in their view, underpriced right now, regardless of how fast they’re expected to grow.
Neither approach is “right”, they’re just different lenses. In practice, plenty of investors blend the two, looking for reasonably priced companies with decent growth prospects, sometimes called “growth at a reasonable price” (GARP).
Key Metrics Value Investors Use
You don’t need to be a maths whizz to understand the numbers value investors use to spot potentially underpriced shares. Here are the big four.
Price-to-Earnings (P/E) Ratio
The P/E ratio compares a company’s share price to its earnings per share, showing how many pounds you’re paying today for every pound of annual profit.
A lower P/E can suggest a share is cheaper relative to its profits — but always compare it against the company’s own history and its sector peers, rather than looking at it in isolation, since some industries naturally trade on higher or lower P/Es than others.
Price-to-Book (P/B) Ratio
The P/B ratio compares a company’s share price to its “book value” — roughly, the value of its assets minus its debts, per share. A P/B ratio below 1 can mean a share is trading for less than the value of its underlying assets, which value investors often see as an interesting starting point for further research.
Dividend Yield
This is the annual dividend paid per share, shown as a percentage of the share price. Many value investors like companies that pay a steady, sustainable dividend, since it’s a sign of a business generating real cash rather than just a promising story.
Debt-to-Equity Ratio
This measures how much a company relies on borrowed money compared to shareholder funds. Value investors generally prefer businesses with manageable debt levels, since heavily indebted companies are more vulnerable when interest rates rise or profits dip.
The Pros and Cons of Value Investing
The upsides: it’s a well-tested, long-term approach with a strong track record; the margin-of-safety concept helps manage downside risk; and it encourages patience and discipline rather than chasing hype or headlines.
The downsides: it can take a long time (sometimes years) for the market to “catch up” to a share’s true value, it requires genuine research rather than following tips, and cheap shares are sometimes cheap for a very good reason, which brings us to value traps.
Watch Out for Value Traps
A value trap is a share that looks cheap on paper (a low P/E ratio, a high dividend yield) but is actually a business in genuine decline, not a bargain.
The classic mistake is fixating on a low valuation without asking why the market has priced it that way.
To avoid falling into one, look at the whole picture: is profit trending consistently downward over several years? Is the company losing ground to competitors? Is it cutting investment in the business just to keep paying its dividend?
A share that’s cheap because the market has correctly spotted trouble ahead isn’t a bargain. It’s a warning sign!
How to Start Value Investing: Step by Step
- Learn the basics properly first. Read a beginner-friendly overview of how shares work and how stock markets function before picking individual companies, our beginner’s guide to index funds is a good place to start if you want broad market exposure while you learn.
- Open an investment account. A Stocks and Shares ISA is a popular choice for UK investors, since it shelters any gains or dividend income from tax. Compare the best investment platforms in the UK to find one with low fees for the amount you plan to invest.
- Start with the numbers, not the story. Look up a company’s P/E ratio, P/B ratio, dividend yield and debt levels before getting swept up in a good narrative- value investing is about facts and figures first.
- Read the annual report. It sounds daunting, but a company’s annual report (and its “chairman’s statement”) will tell you far more about the real state of a business than a headline or a tip from a forum ever will.
- Build in your margin of safety. Once you’ve estimated what you think a company is worth, only buy at a meaningful discount to that figure — never at, or above, your estimate of fair value.
- Diversify and be patient. Spread your investments across several companies and sectors rather than betting everything on one “bargain,” and be prepared to hold for years, not weeks, value investing rewards patience above almost everything else.
Is Value Investing Right for You?
Value investing tends to suit patient, research-minded investors who are comfortable holding shares for the long term and aren’t put off by a bit of homework.
If you’d rather take a simpler, more hands-off approach, a low-cost index fund tracking the wider market is a perfectly sensible alternative (and plenty of investors do both). There’s no single “correct” way to invest, the best strategy is the one that matches your own risk appetite, time horizon, and how much research you actually enjoy doing.
This article is for information and educational purposes only and is not regulated financial advice. Value investing, like all forms of investing, carries risk — share prices can fall as well as rise, and you could get back less than you invest. Past performance (including Warren Buffett’s) is not a guide to future results. Always do your own research and consider speaking to a regulated financial adviser before making investment decisions.
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