How to Find Undervalued Stocks (Plain-English Guide With Example)

You want to invest in US stocks but you do not know what to buy. You have read that the trick is to buy undervalued stocks. The market is mispricing them, and you wait for the price to catch up. That advice is correct. It is also useless on its own, because nobody tells you how to find undervalued stocks in plain English without a finance degree.

This guide does. We will work through the five signals experienced investors actually use to find undervalued stocks. We will name the traps that fool almost every beginner. And we will run a worked example on a stock you already know — McDonald's — so you can see what the process looks like end to end. It takes about fifteen minutes per stock once you have done it once.

By the end you will have a defensible answer to the simplest question retail investors get wrong over and over. Is this stock actually a bargain, or does it just look like one?

What "undervalued" actually means (and why how to find undervalued stocks matters)

A stock is undervalued when its market price is meaningfully lower than what the underlying business is reasonably worth. Two words in that sentence do the work:

• "Underlying business" — not the stock chart, not the ticker, not what people are saying on social media. The actual cash-generating business behind the ticker.
• "Reasonably worth" — a value you can defend in numbers, using cash flows the business already produces.

The gap between price and underlying value exists because markets are not perfectly efficient. Prices move on emotion, short-term news, sector rotation, and what a single analyst said on TV. The underlying business — sales, profits, cash flow — moves much more slowly. When the two disconnect, the market is offering you something for less than it is worth, or asking you to pay more than it is worth. Your job, when learning how to find undervalued stocks, is to spot the first case and ignore the second. That is the whole game of how to find undervalued stocks.

Three quick clarifications, because beginners who set out to find undervalued stocks get these wrong constantly:

1. A low share price is not undervalued. A $5 stock and a $500 stock can both be expensive or cheap. Price-per-share is meaningless without the rest of the story.
2. A stock that has dropped is not automatically undervalued. It might be cheaper today than yesterday and still expensive against what the business is actually worth.
3. An "undervalued" call requires a value estimate. You cannot say a stock is undervalued without first deciding what it is worth. The number that does the work is intrinsic value, and we cover the formal version in our margin of safety formula guide.

Five signals you check to find undervalued stocks

When investors who do this for a living try to find undervalued stocks, they check five signals before they take a position. None of the five is sufficient on its own. Two or three pointing the same way is the start of a candidate. This is the practical answer to the question of how to find undervalued stocks systematically.

Signal 1 — Free cash flow yield higher than a Treasury bond

Free cash flow yield is the most underrated metric in retail investing and the single best place to start when you are trying to find undervalued stocks. It answers a simple question: if you bought the whole company at today's price, what cash return would you earn from it next year? You compute it as the company's free cash flow divided by its market capitalisation:

FCF yield (%) = Free cash flow ÷ Market cap × 100

Free cash flow is operating cash flow minus capital expenditures, both pulled from the company's annual filing (the 10-K). Market cap is the current share price times the number of shares outstanding.

The benchmark is the 10-year US Treasury yield, roughly 4.5 percent at the time of writing. A good rule of thumb for a quality business is to want an FCF yield at least 2 percentage points above the Treasury — call it 6.5 percent or better. Anything below the Treasury rate is the market telling you it expects the business to grow into a better return. Anything above suggests the market is paying less for that cash than for the bond.

Signal 2 — Price-to-earnings below the company's own history and below industry peers

The price-to-earnings ratio (P/E) tells you how many dollars you are paying for each dollar of annual profit. A P/E of 15 means you pay $15 for every $1 of earnings. Lower is cheaper, all else being equal.

The "all else being equal" matters. Compare a stock's P/E against two anchors:

• Its own 5-year average. A stock trading at a P/E below its own historical norm is cheaper than it usually is. Useful signal.
• Its industry peers. A consumer-staples company at a P/E of 15 might be cheap; a software company at the same P/E might be expensive for its sector. Comparable matters.

Both anchors should agree. A P/E below history and below peers is a real signal. A P/E only below one of the two often means the entire industry is having a bad year (and yours is going down with it) or that the company has a specific problem the market is pricing in.

Signal 3 — Insider buying with their own money

Every executive at a publicly listed company has to disclose any personal share purchase or sale within two business days. The filing is called Form 4. When an executive — particularly a CEO or CFO — uses their own money (not just stock options) to buy shares in the open market, it is a meaningful signal. They know more about the company than anyone outside, and they are choosing to add to their position at the current price.

You can look up Form 4 filings for any US-listed company free at SEC EDGAR. Multiple insiders buying in the same window is a stronger signal than one. Insider selling is much harder to interpret. Executives sell for diversification, tax planning, and lifestyle reasons unrelated to the stock. The signal is asymmetric.

Signal 4 — Trading materially below independent fair-value estimates

A few independent research houses publish "fair value" estimates for US-listed stocks. The big three are Morningstar (free for basics), Value Line, and S&P Capital IQ. If the consensus of these estimates is materially above the current share price — say, 20 percent or more — that is a third party's analysis saying the stock is cheap. Treat it as a sanity check, not a primary signal. The estimates can be wrong. But a 30 percent gap between the current price and three independent valuations is worth investigating.

Signal 5 — The story is fixable, not broken

This is the signal most beginners trying to find undervalued stocks miss. A stock can pass all four numerical signals above and still be a terrible buy if the underlying business is in decline. The question to ask is:

• Why is this stock cheap right now? There is always a reason.
• Is the reason temporary (a missed quarter, a sector-wide pullback, a regulatory scare that will pass) or structural (the business model is obsolete, key customers are leaving, the moat is eroding)?

If the story is temporary, the discount is the bargain. If the story is structural, the discount is the market knowing more than you. The four metric-based signals will not tell you which is which. Reading the company's most recent annual filing — at least the "Management's Discussion" section — will. Our working investor's guide to the 10-K shows you which sections to read and which to skip.

How to find undervalued stocks in practice: a McDonald's worked example

Let's run the process end to end on a stock everyone knows — McDonald's (ticker: MCD). All numbers come from MCD's fiscal-year 2025 annual report, filed with the SEC on February 24, 2026.¹

Line item (MCD FY2025)	Value
Revenue	$26.89B
Operating income	$12.39B
Net income	$8.56B
Cash from operating activities	$10.55B
Capital expenditures	$3.37B
Free cash flow (OCF − capex)	$7.18B
Common shares outstanding	710.5M
Share price at time of writing	$279.20
Implied market cap	~$198.3B

Signal 1 — Free cash flow yield. $7.18B ÷ $198.3B = 3.62%. Compared to a 10-year Treasury at roughly 4.5 percent, McDonald's FCF yield is below the risk-free rate. By this signal, McDonald's is not undervalued today. The market is pricing in growth and quality that the formula cannot see.

Signal 2 — Price-to-earnings. EPS = $8.56B ÷ 710.5M = $12.05. P/E = $279.20 ÷ $12.05 = 23.2x. McDonald's 5-year average P/E has been roughly 24-26, so 23.2x is in line with its own history. The restaurant industry median P/E sits closer to 18-22, so MCD is on the higher end of its peers. No clear bargain here either.

Signal 3 — Insider buying. A quick check of SEC EDGAR's Form 4 filings for MCD shows the usual pattern for a mature large-cap: routine option exercises and small sales for diversification. No meaningful open-market personal-money buying by executives. No bargain signal.

Signal 4 — Independent fair-value gap. Morningstar's published fair-value estimate for MCD has hovered close to the current trading price for the last twelve months. There is no meaningful gap. No bargain signal.

Signal 5 — Story check. McDonald's is the classic high-quality franchise model: about 95% of its restaurants are operated by franchisees, which means McDonald's earns rent and royalties (very stable cash flows) rather than absorbing the operational risk of running the restaurants itself. The business is not broken. It is just not on sale.

Verdict. McDonald's is not an undervalued stock at $279.20. None of the five signals fire. The math does not say "don't own McDonald's". It says "the market is currently paying a premium price for McDonald's predictability". That is a perfectly defensible reason for someone to buy it, but it is not a value trade. When you successfully find undervalued stocks, two or three of these signals fire simultaneously on the same name.

The reason this matters is that beginner investors often confuse "well-known stable company" with "undervalued stock". They are not the same thing. The five-signal process is how to find undervalued stocks reliably, and it tells you which McDonald's actually is on any given day.

## Five traps that fool beginners trying to find undervalued stocks

When you are learning how to find undervalued stocks, the errors retail investors make are predictable. If you can avoid these, you will outperform a meaningful fraction of the market.

1. Confusing cheap with undervalued. A $4 stock is not a bargain because it is "cheap". A stock that is down 40 percent is not a bargain because it has fallen. Cheap describes the price; undervalued describes the gap between price and worth. Different things.
2. Buying into a dying business at a low multiple. A famously low P/E is sometimes the market correctly pricing a business whose earnings will be lower next year. The classic example is print newspapers in 2010. They all looked cheap on trailing earnings. Almost none of them recovered. This is the "value trap".
3. Following a hot tip without checking the math. The next-Tesla post on social media has never been the next Tesla. Every undervalued stock thesis needs to survive five minutes of math, not just five minutes of enthusiasm.
4. Buying it because Buffett owns it. Berkshire's portfolio is public. The price Buffett paid is also usually public. You are almost never buying at his cost basis. A stock that was undervalued at $50 may be fairly valued at $90. Run the signals at today's price, not his.
5. Confusing a price drop with a bargain. A stock down 25 percent on a bad earnings report has a new fair value implied by the bad news. Sometimes the new fair value is still above the new price — a true bargain. Sometimes the new fair value is the new price — the market got it right. The math tells you which; the chart does not.

How to find undervalued stocks the lazy way

The process above is sound and it works. It is also tedious to run by hand every time you want to evaluate a new ticker. If you want the same five-signal check on any US-listed stock — pulled live from the SEC, computed with current market data, and written up as a thesis — that is exactly what our AI agent does. You read a finished analysis in minutes instead of researching for an hour. You enter a ticker and it produces the same kind of worked analysis you just read above, on demand, on any US company. Try it on a name from your watchlist — start at the homepage and pick a ticker.

If you want the formal versions of each step in this guide, the margin of safety formula covers how to turn an undervalued conclusion into a buy-or-pass decision; the owner earnings formula refines the cash-flow figure used in Signal 1; the economic moat guide covers Signal 5; and the DCF valuation walk-through ties them all together.

What learning how to find undervalued stocks actually requires

Most articles on how to find undervalued stocks end by telling you that picking stocks is hard. They say most retail investors lose money. They tell you to buy index funds instead. Those things are mostly true. They are also a cop-out for anyone genuinely trying to learn how to find undervalued stocks the right way.

The honest version is this. Stock-picking is hard because it requires both rigour and patience. The rigour is what you just read above. Five signals, a worked example, a refusal to skip the math. The patience is what comes after. You own the position long enough for the market's mispricing to correct, which can take months or years. You do not sell when the price moves against you in the meantime. The number of retail investors who get the math wrong is large. The number who get the math right and lose patience is larger.

Use the five-signal framework, run it on every stock you are considering, and write down your reasoning before you buy. That discipline is how to find undervalued stocks reliably over years rather than once by luck. Writing the case down before the trade turns "I think this is undervalued" into something you can audit later. Six months from now, when the price has moved up or down for reasons you did not anticipate, you will be glad you have your original case in writing.

For more long-form essays on value-investing methodology, see the [rest of the Hub](/hub).