Cannot Tell You
Every conversation about a stock eventually lands on the same number. The PE ratio. It appears on screeners, in analyst reports, in every WhatsApp group that discusses investing. It is cited with confidence by participants at every level of experience. And almost none of them can tell you clearly what it does not measure — which turns out to matter far more than what it does.
The PE ratio measures one thing accurately: the multiple the market is currently paying per rupee of trailing earnings. At 15×, the market pays ₹15 for every ₹1 earned. At 85×, it pays ₹85. That description is always correct. The problem is not the number itself. The problem is everything investors read into it that isn't there — cheapness, value, safety, opportunity — without doing the work to earn those conclusions.
This issue works through six situations where the PE ratio tells part of the truth, obscures the rest, or goes silent entirely. Each one surfaces a different question the investor must answer on their own.
The following case studies are presented for educational purposes only. They are not investment recommendations or advice. All companies and indices are referenced solely to illustrate investment principles.
Titan Company, India's largest listed jewellery retailer, traded at roughly 85 times earnings at a point where many investors described the valuation as expensive. The compounding continued well beyond that point. The PE was not wrong — it accurately described what the market was paying. Whether that price was justified required a different question: what growth rate does this multiple embed, and is that rate achievable? The number opened the question. It did not close it. (Reference to Titan Company is for case study illustration purposes only and should not be taken as an investment recommendation.)
In FY2022, Zomato reported net losses. No trailing PE was calculable. Every investor who bought was making a forward PE bet — pricing an expectation of future profitability, at a margin and scale that did not yet exist. Trailing PE is a fact. Forward PE is a belief. The error is treating one as the other without explicitly naming the distinction — and without examining whose estimate built the denominator. (Reference to Zomato is for case study illustration purposes only and should not be taken as an investment recommendation.)
From 2017 to 2020, Yes Bank's PE multiple compressed at almost every level. Each step lower looked like a better entry relative to the historical average. But the historical multiple described a fundamentally different institution — with different asset quality, different governance, and different earning power. The anchor was a real number. The business it described was no longer there. Comparing today's PE to the PE you remember is not analysis. It is anchoring. (Reference to Yes Bank is for case study illustration purposes only and should not be taken as an investment recommendation.)
The Nifty IT Index showed similar PE multiples at two very different points — but the meaning was opposite. In early 2020, compression reflected market-wide fear unrelated to technology fundamentals. In 2022 to 2023, compression reflected structural multiple contraction from rising global interest rates and a slowdown in discretionary IT spending. The number was similar. The context was not. Context is not supplementary to the PE ratio — it is what converts a ratio into an insight.
At the time of Paytm's IPO in November 2021 — one of India's largest — the company reported net losses. A trailing PE was structurally unavailable. Something else had to supply the valuation framework — and that something else was a narrative about when profitability would arrive and at what margin. A PE tells you the price of earnings. When earnings are absent, the price is a bet. The investor's discipline is knowing precisely what they are betting on, and being able to state it clearly. (Reference to Paytm is for case study illustration purposes only and should not be taken as an investment recommendation.)
Benjamin Graham asked a foundational question: what is this business worth if it never grows? That answer — Earnings Power Value — is the floor beneath any valuation. Strip away growth assumptions, normalise today's earnings, capitalise at the cost of capital. If the current price sits below that floor, you are acquiring proven earning power at a discount. Growth, if it arrives, is incremental. This discipline — paying for a certain present and treating growth as upside — has been applied in Indian equity markets, including through the work of PPFAS Mutual Fund (Parag Parikh Financial Advisory Services) in evaluating Coal India, a public sector company with high earnings consistency and meaningful dividend yield. (References to Coal India and PPFAS / Parag Parikh are for case study illustration purposes only and should not be taken as investment recommendations.)
"Growth is a bonus. Proven earnings are the floor. Know the floor before you assess the ceiling."
Benjamin Graham · Earnings Power Value FrameworkThe Through-Line
The PE ratio is accurate. It is not complete. It answers one question — what multiple is the market paying on trailing earnings — and leaves five others unanswered.
What it omits about the earnings: Whether they are trailing or estimated; whether they are cyclically normalised or distorted; whether they convert to cash.
What it omits about the context: The growth rate the multiple embeds; the interest rate environment compressing or expanding multiples; the earnings cycle stage; the alternatives available to capital.
What it omits about the business: Whether the business that produced the historical PE is the same one being priced today.
What it cannot say at all: Anything useful when there are no earnings to divide — at which point the investor must supply a different framework entirely.
The investor's job is not to read the PE ratio. It is to complete it — by answering the questions it does not raise.
The six cases in this issue map the boundary of what the PE can tell you. Titan Company: the multiple looked expensive but contained a growth assumption that proved achievable — the number opened the question, not closed it. Zomato in FY2022: without trailing earnings, every buyer was making a forward projection without necessarily naming it as such. Yes Bank from 2017 to 2020: the anchor to historical multiples was real, but the business it described had changed. The Nifty IT Index: the same multiple at different points carried opposite implications depending on the macro context that drove it. Paytm's IPO: with no earnings, narrative filled the space the PE left empty. The Coal India EPV case: Graham's floor — the value of proven, normalised earnings, independent of growth — is what remains when you strip away every assumption that has not yet been demonstrated.
The through-line: the PE ratio is always accurate as a description of the current multiple. It is never, on its own, sufficient as an analysis. The investor who uses it as a conclusion has skipped the questions that determine whether the price makes sense — the growth rate it embeds, the earnings quality beneath it, the context around it, and the floor beneath any growth premium.
The PE ratio does not tell you what a business is worth. It tells you what the market is currently paying. The two are almost never the same number.
The PE ratio, Earnings Power Value, forward vs trailing frameworks, and the anchoring trap — all worked through with Indian case studies — are inside the Investor Codex Learning Hub.
Explore the Learning HubEducational Disclaimer: All company and index references in this newsletter are presented as case studies for educational purposes only. They do not constitute investment advice, research recommendations, or solicitation to buy or sell any security. Investor Codex is not registered with SEBI as a Research Analyst or Investment Adviser. Past performance is not indicative of future results. Please consult a registered financial adviser before making any investment decision.