What is P/E Ratio? How to Value Stocks Using Price to Earnings
P/E ratio tells you how many years of profit you pay for when buying a stock.
The Price-to-Earnings (P/E) ratio divides a stock's current market price by its earnings per share. It tells you how much investors are willing to pay for each rupee of the company's earnings. A P/E of 20 means investors pay Rs.20 for every Rs.1 of annual profit.
Think of buying a business that earns Rs.10 lakh per year. If the asking price is Rs.1 crore, you pay 10 times its annual earnings (P/E of 10). If the price is Rs.2 crore, the P/E is 20. Lower P/E may mean better value, but context matters enormously.
P/E Ratio = Market Price per Share / Earnings per Share (EPS)
If HDFC Bank stock price is Rs.1,700 and EPS is Rs.85: P/E = 1,700 / 85 = 20x
What is a good P/E ratio?
There is no universal good P/E. NIFTY 50 average is around 18 to 22. IT companies trade at 25 to 35 P/E. PSU banks trade at 6 to 12 P/E. High-growth companies command higher P/E because investors pay for future earnings growth. Always compare P/E within the same sector and against the company's own historical range.
Why do some stocks have very high P/E?
Investors expect rapid future earnings growth. A stock with P/E of 50 might be growing earnings at 30% annually. At that rate, the P/E will drop to 25 in just two years even if the stock price does not change. High P/E is justified only when growth delivers. If growth disappoints, the stock corrects sharply.
Compare P/E ratios across sectors on Stockk Equity. Get personalized stock analysis through Stockk Advisory.
Frequently Asked Questions
Can P/E ratio be negative?
Yes, when EPS is negative (loss-making company). A negative P/E is meaningless for valuation. For loss-making companies, use Price-to-Sales or Price-to-Book instead. Negative P/E companies are either turnarounds or value traps.
Should I always buy low P/E stocks?
No. Low P/E can indicate genuine value or a company in decline. A stock with P/E of 5 might be cheap because earnings are about to collapse. A stock with P/E of 30 might be fairly valued if growing at 25%. Context and quality matter. Use StockkAsk at stockk.trade/stockkask to check whether a low P/E is a value opportunity or a warning.
What is P/E expansion and compression?
P/E expansion: the market assigns a higher multiple due to improved sentiment or growth expectations. P/E compression: the multiple shrinks due to slowing growth or rising risk. The biggest stock returns come when both earnings grow and P/E expands simultaneously.
How to compare P/E across different markets?
Indian markets trade at higher P/E than many emerging markets due to higher growth expectations. US markets trade at similar or higher P/E. Comparing P/E across countries requires adjusting for growth rates, currency, and risk premiums.
Is sector P/E average useful?
Very useful. If the IT sector average P/E is 28 and a quality IT company trades at 20, it might be undervalued relative to peers. Sector P/E provides context for individual stock valuation. Always check why a stock trades below sector average before assuming it is cheap.
Investments in securities market are subject to market risks. This article is for educational purposes only and does not constitute investment advice.
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