Why can a genuinely "cheap" multiple stay cheap forever?

Everything in this course has been building to one mature idea: a low multiple is not the same as a good deal. Sometimes a cheap-looking multiple is cheap for a reason the market understands and you don't — a situation known as a value trap. This lesson is framed strictly as observation, because it's exactly the place where naive rules do the most damage.

What a value trap looks like

A value trap is a company that screens as cheap — low P/E, low P/B, low EV/EBITDA — and stays cheap, or gets cheaper, because the low multiple was correctly reflecting a deteriorating business. The cheapness was the market's verdict, not an oversight. Classic ingredients:

• Structural decline. The industry is shrinking (think print media, some legacy retail). Today's earnings are real but eroding, so a low multiple on them is rational.
• The cyclical mirage from the last lesson — a low P/E sitting right at peak earnings.
• Hidden problems — debt coming due, a legal overhang, an accounting quirk — that depress the price for reasons the headline multiple doesn't show.
• A melting balance sheet — a low P/B on assets the market rightly doubts are worth their book value.

In each case the multiple isn't lying. It's compressing a real problem into a small number that looks like an opportunity.

Why "cheap = buy" is a broken rule

The instinct "low multiple, therefore undervalued, therefore buy" fails because it assumes the only reason for a low multiple is market error. Often the low multiple is market accuracy — a fair price for a fading business. Distinguishing a genuine bargain (a good business the market is temporarily too gloomy about) from a value trap (a declining business priced correctly) is one of the hardest problems in all of investing, and no single ratio solves it. It requires understanding the business's future, not just its current numbers.

The disciplined stance

So the practitioner's stance is deliberately humble. A cheap multiple is an invitation to investigate, never a conclusion. The right next question is not "how do I buy this?" but "why is the market pricing this so low, and do I understand something they don't — or do they understand something I don't?" Most of the time, honestly answered, the market's low price turns out to be informed. That humility is the difference between using multiples well and being used by them.

In the data

To see whether a valuation stayed low rather than merely being low today, you need its history. Here is Devon Energy's market capitalisation, first point, second-latest and latest:

The series is roughly weekly and reaches back about five years (on 29 September 2026 it began on 17 September 2021, though it was asked for from 2020). The company's financial statements, which you would pair it with, change once a year. So any multiple built from the two carries a stale denominator between filings.

Try it now

1. Screen an industry for the cheapest-looking names. The top of the energy sector by market value, then six of its producers on the same multiples:

Sort the six by trailing P/E yourself and note which sits lowest. On 28 September 2026 that was Devon Energy (DVN), and the next two steps follow it. 2. Open it and look for the reason the market might be pricing it low. Two angles from the statements, a multi-year revenue and profit trend and the debt beside it:

The third angle, what is being said about the company, is not in the statements at all; start from its page in the Terminal: Open DVN.US in the EODHD Terminal. One integrated major's newest year, for contrast with a producer's, is below.

3. Then check whether it stayed cheap rather than merely being cheap today, with the market-cap history under "In the data". Set the first point against the latest, then compare the latest point's date with today, and the gap between the last two points with a week. Pair the latest value against the newest annual net income in the table under step 2 and write down the date on which that denominator was last true.
4. Write the value-trap question for it: "cheap because the market is too pessimistic, or cheap because the business is genuinely declining?" Sitting with that question — not resolving it into a recommendation — is the whole point.