Cheap vs. Expensive Stock
A low P/E can look cheap and a high P/E can look expensive, but it really depends on how fast the company is growing.
Why it matters
A high share price does not mean a stock is expensive, and a low one does not mean it is cheap. A stock that costs ₹2,000 can be a bargain, and one that costs ₹40 can be overpriced. The sticker price on its own tells you almost nothing about whether you are getting good value.
What actually matters is the price compared to how much the company earns. Once you learn to look at price next to profit, you stop being fooled by big or small numbers and start judging what you are really paying for.
An everyday way to picture it
Imagine two shops on the same street are both for sale, and both earn the same profit of ₹1,00,000 a year. The first shop is priced at ₹10,00,000 and the second at ₹20,00,000. They bring in identical money, yet the second costs twice as much to buy.
You would not decide just by looking at the price tag. You would compare the price against what the shop earns. The first shop pays back its price in ten years of profit, the second takes twenty. Same earnings, very different value. Stocks work in exactly this way, and the P/E ratio is the tool that makes the comparison for you.
The idea behind cheap and expensive
Every company reports its earnings per share, written EPS, which is simply the yearly profit split across all its shares. The P/E ratio takes the share price and divides it by that EPS. It tells you how many rupees you pay for each one rupee of yearly profit, a bit like the number of years it would take to earn your money back if profits stayed flat.
For example, a share that costs ₹200 in a company earning ₹20 per share each year has a P/E of 10, because 200 divided by 20 equals 10. You are paying ten rupees for every one rupee of yearly profit. A lower P/E can mean the stock is cheaper, and a higher P/E more expensive, but it is not the whole story.
| Low P/E (looks cheap) | High P/E (looks expensive) | |
|---|---|---|
| What you pay | Fewer rupees for each ₹1 of yearly profit | More rupees for each ₹1 of yearly profit |
| Often means | A steady or slow-growing business, or one out of favour | Fast growth that investors expect to continue |
| The catch | Can be a value trap if profits keep shrinking | Price can fall hard if the growth does not arrive |
So a cheap-looking stock is not always a good buy, and a pricey-looking one is not always a bad buy. The P/E gives you the question to ask, not the final answer.
See it for yourself
Both companies can carry any price you choose. Change what each one earns per share and watch the P/E decide which is really cheaper.
Cheaper on price for each rupee of profit: Company A. Notice that two companies can share the same share price and still be priced very differently. The one that earns more per share has the lower P/E, so you pay less for each rupee of profit.
Worked example: same profit, very different price
Company A trades at ₹100 a share and earns ₹10 per share each year. Company B trades at ₹500 a share and also earns ₹10 per share each year. Both hand you the same ₹10 of yearly profit per share, but the price you pay for it is worlds apart.
| Company A | Company B | |
|---|---|---|
| Price per share | ₹100 | ₹500 |
| Earnings per share each year | ₹10 | ₹10 |
| P/E ratio | 100 ÷ 10 = 10 | 500 ÷ 10 = 50 |
| You pay for each ₹1 of profit | ₹10 | ₹50 |
Both earn the same ₹10 a share, yet Company B costs five times as much for that identical rupee of profit. By the only measure that counts, Company B is far more expensive, even though a beginner glancing at the prices might assume the ₹500 stock is simply the better company.
Now you decide, and here is the consequence either way. Both choices carry a hope and a risk.
| If you buy | The hope | The risk |
|---|---|---|
| Company A, the low P/E | It is genuinely cheap and the price rises as more investors notice the value | It is a value trap, where the low price reflects a business whose profits keep shrinking |
| Company B, the high P/E | Fast growth lifts its earnings until the high price starts to look fair | The growth disappoints, and the price falls hard to match the smaller-than-hoped profit |
There is no single right answer. A low P/E can be a bargain or a trap, and a high P/E can be justified by real growth or punished when that growth fails to arrive. The skill is asking which case is true before you buy.
Remember this
In short: a high share price does not make a stock expensive, and a low one does not make it cheap. Compare the price to the company's earnings with the P/E ratio, then ask whether a low P/E is a real bargain or a value trap, and whether a high P/E is backed by genuine growth.