Two stocks. Both sitting at a P/E of 20. Your first instinct is to call them equally priced.
Except one company is growing its profits by 10% a year, and the other by 25%. Same sticker price, two completely different businesses, and the plain P/E ratio has no way of showing you that difference.
If you have ever bought a stock because its P/E looked "cheap" and then watched it go nowhere while a pricier-looking stock kept climbing, welcome to the club, Wanderer.
You did nothing wrong. P/E is a fine starting point. It just leaves out one thing: growth.
So, Wanderer, here at The Bazaar Guru, let's sort this out properly.
Here's the short version: the PEG ratio takes a stock's P/E ratio and divides it by how fast its earnings are expected to grow, so it tells you whether the price actually matches the growth on offer. Below, you'll find the formula, a simple worked example, current market context, and the places where PEG can trip you up if you lean on it too hard.
In This Post:
What Is the PEG Ratio, Exactly?
The PEG Ratio Formula, Broken Down
A Worked Example: Same P/E, Different Growth
How to Read a Low vs a High PEG Ratio
PEG in Context: Where the Market Stands Right Now
Where the PEG Ratio Falls Short
Common Mistakes to Avoid
FAQs
Key Takeaways
Go Deeper
Disclaimer
What Is the PEG Ratio, Exactly?
The PEG ratio, short for Price/Earnings-to-Growth ratio, takes a company's P/E ratio and adjusts it for how fast its earnings are expected to grow.
Picture two phones priced at the same amount. One is last year's model with nothing new coming.
The other belongs to a brand that keeps improving fast. The price tag alone won't tell you which is the smarter buy.
PEG does that same job for stocks. It takes the "price tag" (the P/E) and checks it against how quickly the business behind it is actually growing.
A stock with a high P/E ratio is not automatically overpriced if its earnings are growing fast enough to back that price up. The PEG ratio is what actually checks whether the two line up.
The PEG Ratio Formula, Broken Down
PEG Ratio = P/E Ratio ÷ Annual Earnings Growth Rate (as a whole number, not a decimal)
You only need two numbers, and you probably already come across both of them regularly.
P/E Ratio: the current share price divided by earnings per share (EPS). A stock trading at ₹400 with an EPS of ₹20 has a P/E of 20.
Earnings Growth Rate: how fast the company's profits are projected (or have historically grown) each year, written as a plain number. A company expected to grow earnings by 15% a year goes into the formula as 15, not 0.15.
Divide one by the other and you get the PEG ratio. A PEG of 1 is usually treated as the textbook "fair value" line.
But what counts as fair actually changes depending on which sector a stock belongs to, which we'll get into shortly.
A Worked Example: Same P/E, Different Growth
Take two companies. Both trade at a P/E of 20.
Company A, a stable FMCG maker: earnings growing 10% a year. PEG = 20 ÷ 10 = 2.0.
Company B, a fast-scaling IT services firm: earnings growing 25% a year. PEG = 20 ÷ 25 = 0.8.
On P/E alone, both stocks look priced the same. But once you factor in growth, Company B looks like the better deal. Its PEG of 0.8 sits below the 1.0 marker, while Company A's PEG of 2.0 sits well above it.
This example uses round numbers purely to show how the maths works. It is not a stock tip. Always check a company's actual, current growth numbers before drawing any conclusion from them.
How to Read a Low vs a High PEG Ratio
A PEG under 1 usually suggests a stock could be undervalued for the growth it offers, since you're paying less for each unit of expected earnings growth.
A PEG over 1 usually suggests a stock could be overvalued for its growth, since the price has run ahead of what the growth actually supports.
A PEG sitting close to 1 is often read as fairly priced, where what the market expects and what the company is actually delivering roughly match up.
Treat these as starting points, not final answers. A fast-growing small-cap and a slow, steady bank should never be judged against the same PEG number, and that's exactly what the next section covers.
You may also want to read: What Is the P/B Ratio? A Simple Guide for Indian Investors
PEG in Context: Where the Market Stands Right Now
PEG only means something once you compare it to a benchmark. As of the third week of July 2026, the Nifty 50 trades at a P/E of around 20.3 to 20.5, just below its long-term average of about 23.4. That puts the broad Indian market in the fair value zone right now, neither cheap nor expensive.
Different sectors trade at very different PEG ranges too, since the market prices in growth expectations differently across industries.
IT stocks are a good example right now. The Nifty IT index has fallen sharply through 2026, and the sector's P/E has dropped to around 20.6, well below its own 5-year average of about 29 and its 10-year average of about 24. A big reason for this is investor worry that AI tools could reduce the need for the routine, offshore work Indian IT companies do for global clients.
Private banks usually trade at lower multiples than the broad market. Bank profits tend to rise and fall with the wider economy, so investors typically pay less for each rupee of bank earnings compared with steadier businesses.
FMCG companies usually get the opposite treatment. Investors are often willing to pay a higher price for their steady, predictable earnings, even when the company's actual growth is fairly modest.
Here's a rough guide to how PEG typically stacks up sector by sector. These are broad, illustrative ranges meant to give you a sense of scale, not live numbers, so always check current sector data before comparing any specific stock against them.
| Sector | Typical PEG Range | What It Reflects |
|---|---|---|
| IT Services | 1.5 to 2.5 | Currently trading toward the lower end due to the 2026 AI-related sell-off |
| FMCG | 2.5 to 4.0 | Premium paid for stability over speed |
| Private Banks | 1.0 to 1.8 | Growth-linked, more cyclical |
| High-Growth Small/Midcaps | 0.8 to 1.5 | Wide range, comes with higher risk |
These ranges are general guides for orientation, not live data. Always check a stock's current PEG before comparing it against the numbers above.
Where the PEG Ratio Falls Short
The growth number in the formula is a forecast, not a guarantee. Analysts revise their growth estimates all the time, sometimes by a wide margin, and that alone can shift a stock's PEG even if the share price hasn't moved an inch.
PEG also assumes growth is the only thing that matters, which it isn't. Debt levels, profit margins, and how well a company can defend itself against competitors don't show up anywhere in this ratio.
That's one reason it helps to also check a company's EBITDA, which gives you a clearer picture of its underlying profits.
Very high growth rates can also make a PEG number look artificially low for companies that have little chance of keeping up that pace, particularly younger or recently listed businesses.
And PEG simply doesn't work for a company whose earnings are shrinking or barely growing at all. The maths falls apart at that point.
Common Mistakes to Avoid
Comparing PEG across unrelated sectors. A bank with a PEG of 1.8 and an IT stock with a PEG of 1.8 are not "priced the same." Only compare companies within the same industry.
Trusting one analyst's growth number blindly. Growth estimates can vary a lot from one analyst to another. Check a couple of sources, or cross-check against the company's own past growth as a sanity test.
Treating a low PEG as an automatic buy signal. Sometimes a low PEG simply means the market has correctly priced in real risk. Pair it with debt levels, cash flow, and the broader sector outlook before deciding anything.
Ignoring one-off spikes in earnings. A temporary jump in profit can distort both the P/E and the growth number that feed into PEG, so check whether a recent quarter's earnings were unusually high or low before trusting the ratio.
FAQs
What is a good PEG ratio?
Generally, a PEG under 1 is seen as attractive because the stock's growth is outpacing its price. Around 1 is considered fair value, and above 1 suggests the price is running ahead of growth. Always compare within the same sector rather than across industries.
Is the PEG ratio better than the P/E ratio?
Neither one replaces the other. P/E tells you what you're paying per rupee of current earnings. PEG adjusts that number for how fast those earnings are expected to grow. PEG works better for comparing growth stocks, while P/E remains the quicker first check for any company.
Can the PEG ratio be negative?
Yes, if a company's earnings are actually shrinking, which gives it a negative growth rate. A negative PEG number isn't meaningful for valuation and shouldn't be read as "cheap."
What counts as a good PEG ratio for Indian growth stocks?
Fast-growing Indian small-cap and mid-cap stocks often carry PEG ratios somewhere between 0.8 and 1.5, reflecting both higher growth expectations and higher risk. Compare against sector peers rather than any single fixed number.
Where can I check a stock's PEG ratio in India?
Most Indian broking apps and financial data platforms such as Screener, Trendlyne, and Moneycontrol show a stock's PEG ratio on its fundamentals page. It's usually worked out using the company's past growth, or analysts' forecasts for its future growth.
Key Takeaways
PEG divides P/E by the earnings growth rate, which adjusts a stock's valuation for how fast the company is actually growing.
A PEG below 1 generally points to undervaluation relative to growth, and above 1 suggests the price may have outrun it.
Only ever compare PEG within the same sector, never across unrelated industries.
Growth numbers are forecasts, not promises, so use PEG as one input among several, not the final word.
Pair PEG with debt levels, margins, and cash flow before making any investment decision.
Go Deeper
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- What Is an Index Fund? A Simple Guide for Indian Investors
Disclaimer: This content is for educational purposes only and should not be considered investment advice. Markets carry risk, and past patterns do not guarantee future performance. Please consult a SEBI-registered investment advisor before making investment decisions.