HOW FINDX CALCULATES FAIR VALUE
Findx estimates stock value using a selected earnings measure and valuation multiple. Learn how the assumptions, dates and available data affect it.
Methodology text updated 2026-09-13.
Prefer to watch? This short explainer covers the same idea; the written explanation below stands on its own.
Fair Value P/E is our estimate of a sensible price tag for the stock. P/E means Price divided by Earnings: how many dollars investors pay for one dollar of profit. If Fair Value P/E is 15, the model reckons 15 dollars per dollar of earnings is a reasonable price. Trade far above that and the stock may be expensive; far below and it may be cheap.
Multiply that multiple by the company's weighted earnings per share and you get fair value itself, drawn as the dark green line on the chart. When the black price line sits above the green one, the market is asking more than the model thinks the business is worth. Below, and it is asking less.
Fair value is a well-reasoned estimate, not a promise. It depends on growth, earnings, analyst estimates, and the model doing the arithmetic. Treat it as a starting point for your own judgment.
Where the growth number comes from
Here is the part most sites hide: you choose. The multiple depends on an assumed growth rate, and the Valuation basis selector lets you decide where that number comes from. Findx supports up to six bases, though which ones you can pick depends on your access level and on whether the underlying data exists for that company.
Three of them run the growth recipe described below:
- ▸Estimated EPS growth (2y): the usual starting point when analysts' estimates exist. It measures how much analysts expect earnings per share to grow from the latest completed financial year to the financial year two years later. Companies' financial years do not always follow the calendar, so this is not exactly two years from today. If no estimates exist, the page starts on EPS growth in period instead.
- ▸Estimated EPS growth (3y): the same idea, one financial year further out, which smooths over a single odd year.
- ▸EPS growth in period: how the company has actually grown over the stretch of history you select on the chart.
The other three do not use the growth recipe at all, which is worth knowing before you read anything into them:
- ▸Analyst price target: takes the analysts' consensus target price and divides it by expected earnings, turning their collective verdict straight into a multiple.
- ▸P/E range (18m): looks at the highest and lowest P/E investors have actually paid for the stock over the last 18 months, using the points shown on the chart. Fair value sits in the middle of that range. The earnings behind those P/E figures include analysts' expectations, so this method is not free of estimates. Its future lines use the 2-year estimated growth when available, otherwise the growth in the selected period. The range shows where the price has been, not where it must stay.
- ▸My values: your own numbers. Type them in, or drag the lines on the chart.
For real estate companies (REITs) the earnings figure can be FFO or AFFO per share instead of EPS, and the same methods then give a Fair Value P/FFO. Funds and ETFs are not valued this way.
Switching between them is the most useful thing on this page. If fair value barely moves as you change basis, you can lean on it with some confidence. If it swings wildly, the stock is telling you its worth hinges on assumptions, and you should tread more carefully.
How the growth-based methods choose the multiple
This is the recipe the three growth bases use. The analyst price target, the P/E range (18m), and your own values set the multiple directly instead, as described above.
The multiple comes from one thing: how fast earnings are growing. A business whose profits are shrinking should not carry the same price tag as one compounding nicely, so Findx sorts companies into four broad bands.
- ▸Shrinking, growth below 0%: a low multiple, between 7 and 10. Falling earnings carry real risk, and the valuation should say so.
- ▸Slow growth, 0% to 5%: the multiple rises from 10 to 13.
- ▸Moderate growth, 5% to 15%: from 13 to 16, around the long-run market average.
- ▸Fast growth, above 15%: from 16 upward, but with a brake applied, and capped at 25. An unusually hot growth number should not send the valuation into orbit.
In formula terms, where growth is the annual rate in percent:
- ▸Growth < 0%: max(7, 10 + growth × 0.6)
- ▸0% to 5%: 10 + growth × 0.6
- ▸5% to 15%: 13 + (growth - 5) × 0.3
- ▸Above 15%: min(25, 16 + √(growth - 15) × 2.25)
Two edge cases worth knowing. If the starting earnings for the period are zero or negative, or the ending earnings are negative, growth cannot be calculated at all, and the model falls back to a conservative multiple of 10 so the chart still has a reference line. And if earnings are missing entirely at either end of the period, no fair value is calculated for that period, because a guess built on a gap is worse than no number.
The band around fair value
Alongside fair value you get an upper and a lower line, together forming a band that shows where the stock sits inside its calculated range. How those two lines are set depends on the basis:
- ▸For the three growth bases and the analyst price target, upper and lower sit 10% either side of fair value.
- ▸For the 18-month range, they are the actual highest and lowest multiples observed in that window.
- ▸For your own values, all three lines are whatever you set them to.
You can drag any of these lines on the chart. It is worth trying: find a level where the share price has historically swung both above and below the line, and you have a multiple fitted to how this particular stock actually trades, rather than to a general rule.
Today's value and future scenarios
The green fair value line on the chart shows, for each date, the chosen multiple times the blended earnings per share on that date. The lines that reach into the future show what the price would be if analysts' expected earnings and the same multiple both turn out right. That is a scenario, not a promise about what the stock is worth today.
Where these levels come from
The growth bands are Findx's own choices. We set the limits, the numbers in the formulas and the cap at 25 so that a company with falling earnings is not given the same price tag as one that is growing steadily.
The idea comes from well-known value-investing books. Benjamin Graham warned against paying much more than 15 times earnings for a slow business. Jeremy Siegel found a long-run market average near 15. Peter Lynch argued that a growth company's P/E should roughly match its growth rate. Naming those authors explains where the idea came from. It does not prove that our exact numbers are right or that they predict returns, and Findx has not tested them as a trading rule.
The analyst price target method sits outside this scheme: its multiple is simply the analysts' target price divided by the earnings they expect.
Blended earnings per share
Earnings per share is the company's profit for each share. Most financial sites use the latest annual report or the last twelve months for it, but the market looks forward. Findx therefore uses blended EPS.
Findx makes the earnings per share change gradually between the yearly figures on the chart. If earnings are 10 per share one year and 12 the next, we show 11 halfway between them. For future years, we use analysts' expectations.
Between two past years both figures are reported. Between the latest reported year and the next year, the figure moves from what the company reported toward what analysts expect. If one of the two yearly figures is missing, we cannot show the calculation.
Blending matters most when earnings are changing quickly, for example in turnarounds, cyclical companies or growth companies, because last year's figure alone can misrepresent what the business now earns. Blending incorporates available forward estimates; it does not make those estimates more certain.
For real estate companies (REITs) the earnings figure can be FFO or AFFO per share instead of EPS, and blended P/FFO follows the same steps. Funds and ETFs are not valued this way.
For the technically minded, the same rule as a formula:
Blended value = earlier figure × (1 - w) + later figure × w
Blended P/E = share price / blended EPS, shown only when blended EPS is positive
Blended P/FFO = share price / blended FFO per share, shown only when blended FFO is positive
"In the short run, the market is a voting machine, but in the long run, it is a weighing machine."
- Benjamin Graham
P/E Bands: Lower, Fair Value and Upper P/E
Every valuation basis shows not just a single fair value line, but a P/E Band with three lines: Lower P/E (floor), Fair Value (middle) and Upper P/E (ceiling). The band gives you a visual overview of where the stock sits relative to its calculated value range.
Interactive adjustment
You can drag the P/E lines directly on the chart. By moving the fair value line up or down you adjust the P/E multiple, so the lines hit the stock's historical highs and lows. This lets you set your own fair value P/E based on how the market has actually priced the stock over time.
P/E Bands are especially useful when:
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You want to compare where the stock price sits relative to the different valuation bases
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You want to adjust the P/E multiple to the stock's actual historical trading pattern
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You want to visualise potential buy and sell zones
By switching between the valuation bases and optionally adjusting P/E with the drag function, you can form a nuanced picture of the stock's valuation from multiple angles.
Why not use more advanced models?
The method used in Findx is not for everyone. Professional analysts and spreadsheet enthusiasts with advanced models will probably find it too simple. And yes, it is, in the best sense. For most private investors, the goal is not to predict the future to decimal-place precision, but to understand a company's fundamental development and assess whether the price looks reasonable. That is exactly what we are trying to make possible.
DCF models (Discounted Cash Flow): A method widely used by professionals where future cash flows are estimated and discounted to present value. It is a valid method, but the answer depends heavily on assumptions about growth, margins, reinvestment, discount rates and the distant future. More rows do not make those assumptions knowable.
Our approach is therefore deliberately simple and transparent. We do not hide uncertainty behind advanced mathematics. We show what the company actually delivered, and how the market has priced it.
The FAQ gives the full, honest defence: why we do not treat a reverse DCF as an answer machine, why Findx does not calculate a terminal value, and why a visible P/E multiple is not literally a hidden DCF. Read “Why we keep it simple” in the FAQ.
If you fundamentally believe that earnings drive stock prices in the long run, as Lynch, Buffett and Graham did, then this is a realistic, effective and data-driven way to find solid investments.
Growth Quality: a cross-check, not a formula input
Growth Quality is a cross-check, not part of the Fair Value formula. It tells you whether the company's cash generation, capital efficiency, and sector-specific financial strength support the growth story. It never guarantees that the growth will continue.
WHAT HAS THE MARKET BEEN WILLING TO PAY?
Some stocks trade more or less consistently above or below the calculated fair value. In those cases it can be useful to look at the historical market value (blue line) instead, especially if the pattern repeats itself across multiple time periods.
Historical market P/E
The blue line shows what investors have historically been willing to pay for the stock's earnings. It is calculated by taking the average P/E over time (excluding extreme values) and multiplying it by the blended EPS day by day.
By comparing the price with both the green and blue lines, you can assess:
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Whether the stock is cheaper than its fair value
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Whether the stock trades below its historical pricing
What you get out of it
With Findx you get a tool that combines financial data, market expectations and historical patterns, all in one view. This makes it easier to identify solid investments, and most importantly: on a well-considered and informed basis.