What Is the PE Ratio and Are Small Caps Expensive Now?

Imagine two shops on your street are up for sale. One earns Rs 10 lakh a year in profit and is priced at Rs 1 crore. The other earns the same Rs 10 lakh but is priced at Rs 3.7 crore. You would not need a finance degree to ask why anyone pays so much more for the second one. That question is exactly what the PE ratio answers for shares, and it matters more this week, because the RBI raised the repo rate to 5.50% on 7 October 2026, its first hike since early 2023.

What Is the PE Ratio in Plain Language?

The PE ratio (price-to-earnings ratio) tells you how many rupees you pay for every rupee of a company’s yearly profit. You find it by dividing the share price by earnings per share. A PE of 20 means you pay Rs 20 for each Rs 1 of annual profit, which is why a lower number is usually read as cheaper.

Take a purely hypothetical company that earns Rs 10 per share and trades at Rs 370. Its PE is 370 divided by 10, which is 37. Notice that this is the same arithmetic as the second shop above: you are paying 37 years of current profit to own it, unless the profit grows.

Where Do Small Cap Shares Stand Today?

Small cap shares are those of smaller listed companies, ranked below the top 250 by market value. They can grow faster than large companies, but they also swing harder in both directions. Hence their valuations deserve a closer look than most beginners give them before they invest.

Maxiom Wealth’s internal valuation snapshot of 7 October 2026 shows the median PE and median PB (price-to-book, explained below) across listed companies in each size band. The median is simply the middle company when all are lined up, so a few extreme outliers do not distort it.

Segment	Median PE	Median PB
Large caps	24.0	3.6
Mid caps	33.3	4.6
Small caps	37.0	5.5

Source: Maxiom Wealth internal valuation snapshot, 7 October 2026. Small caps carry the highest median PE and PB of the three groups. That is unusual, since riskier shares have typically needed to look cheaper than safer ones to attract buyers over the long run.

Does a High PE Always Mean a Share Is Expensive?

Not always, because a high PE means investors expect strong profit growth, and sometimes those investors turn out to be right. A company earning Rs 10 per share today that grows profit to Rs 20 in a few years would see its PE on the old price fall from 37 to 18.5 without the price moving at all.

Think of buying a mango sapling versus a fully grown tree. The sapling costs more per mango it gives today, but you are paying for the harvest years from now. That said, the sapling can also die before it fruits, and small companies fail to deliver promised growth more often than large ones.

So the key point here is that PE alone is a thermometer and not a diagnosis, since it tells you the temperature of expectations without telling you whether those expectations are realistic.

How Does PB Add a Second Opinion?

The PB ratio (price-to-book ratio) compares the share price with the net worth per share on the company’s balance sheet. If a company has a book value of Rs 100 per share and trades at Rs 550, its PB is 5.5, a hypothetical figure that happens to match the small cap median above.

Where PE looks at profit, PB looks at what the company owns after clearing its debts. Banks and finance companies are usually judged on PB, while companies whose profits swing wildly are better judged on it too, because their PE can look absurdly high or low in a single bad year.

Ratio	What it compares	Works best when	Watch out for
PE	Price with yearly profit	Profits are steady and positive	One-off gains or losses distort it
PB	Price with net worth	Company is asset heavy, like a bank	Little meaning for asset-light firms

Why Do Interest Rates Change What Counts as Expensive?

Interest rates set the alternative on offer. When the repo rate rises, as it did to 5.50% on 7 October 2026, safer options such as fixed deposits and bonds slowly start paying more, so shares must justify their prices more convincingly.

Picture a cricket batting average. A score of 40 looks brilliant on a difficult pitch and ordinary on a flat one. Similarly, a PE of 37 looks more acceptable when deposits pay little and more stretched when they pay better. In fact, the rate move alone does not make small caps cheap or dear; it simply raises the bar.

How Can a Beginner Check Whether a Small Cap Is Expensive?

A simple routine works better than any single number, so try these steps before you buy any share or fund.

1. Find the company’s PE and compare it with the median for its size band, as in the table above.
2. Compare it with the company’s own PE from the last five years, which most data websites show.
3. Check PB alongside PE, so you see both profit and balance sheet.
4. Ask whether profit has actually grown over the last three years, since a high PE needs growth to back it.
5. Decide how much of your savings can sit in small caps, then spread the money over months instead of one day.

Of course, spreading money over time is where tools help. The SIP calculator shows what a monthly amount can build, the lumpsum calculator shows the one-time alternative, and the step-up SIP calculator shows what happens when you raise the amount each year as your income grows.

Frequently Asked Questions

What is a good PE ratio for a beginner to look for? There is no universal good number, so compare a company with similar companies and with its own history, because a PE of 15 is high for one industry and low for another.

Is a low PE share always a bargain? No, because a low PE can signal that the market expects profits to fall, so check whether earnings are stable before calling it cheap.

Can the PE ratio be negative? It cannot be used meaningfully when a company makes a loss, so data sites usually show it as not applicable.

Should I stop investing in small caps if their PE is high? Not necessarily, because many investors keep a modest small cap share and invest gradually, so no single entry price decides the outcome.

To sum up, the PE ratio is the price you pay for each rupee of profit, and the PB ratio is the price you pay for each rupee of net worth. Small caps currently carry the highest medians of the three size bands, so a gradual SIP with a modest share of your savings is a sensible way to start. Open a calculator this week and test a monthly amount you would not miss.