- What the number actually is
- A price set on the shares that traded, applied to the ones that did not
- Enterprise value, and the gap that is debt
- The other half of the multiplication moves too
- Large, mid and small cap are ranks, not sizes
- Five numbers people mean by 'what the company is worth'
- Five ways the number gets misread
- Looking at the parts rather than the headline
- Common questions
What the number actually is
Market capitalisation is the share price multiplied by the number of shares outstanding. A share at ₹400 with 25 crore shares outstanding gives a market cap of ₹10,000 crore. That is the market's price for the whole of the equity.
It is the most quoted number in equity investing and the most casually stretched, because three different questions get answered with it — what this company is worth, what it would cost to buy, and how big it is. Market cap gives a defensible answer to exactly one of the three.
The arithmetic is not in dispute. Price is observable, the share count is disclosed, and multiplying them is not controversial. What is in dispute is what the product of the two is evidence of — which is a question about how that price came to exist, and the multiplication hides it completely.
So the useful way to hold the number is as a price, not as a measurement. Prices are set by whoever transacted most recently, in whatever quantity they happened to transact. Everything awkward about market cap follows from that one fact.
A price set on the shares that traded, applied to the ones that did not
On any given day a small slice of a company's shares change hands. The closing price is what the last willing buyer and the last willing seller agreed on for that slice. Market cap then takes that price and applies it to every share in existence, including the ones whose owners would not part with them at any price near it.
Worth saying out loud, because it is the assumption the number is built on: a price discovered on the shares that were for sale, extended to the shares that never were. In India that gap is often a wide one, because promoter families and holding companies commonly hold a controlling stake and have no intention of selling any part of it.
Two consequences follow, in opposite directions. An acquirer who wants the whole company cannot have it at the screen price, because the holders who are perfectly content have to be persuaded, and persuasion costs money. The conventional reading is that this is why control changes hands above the market price rather than at it.
The other direction is less comfortable. Where the freely traded portion is thin, a modest amount of determined selling can take a very large headline number a long way down. A thin float makes market cap a claim about a few shares, restated as a claim about all of them — and the restatement is silent, because nothing in the number tells you how much of it was tested.
Enterprise value, and the gap that is debt
Here is the distinction in one sentence. Enterprise value is market capitalisation plus debt minus cash — the price of the equity, plus the obligations that come attached to it, less the money already sitting inside the company.
The adjustment is not a technicality, and the reason is worth deriving rather than memorising. Buy every share of a company and you own its bank loans too. They do not vanish when ownership changes; they become yours to service out of the same profits you bought. The cash on the balance sheet works the other way — it is yours the moment you hold the equity, so part of the purchase price is money you are handing to yourself.
Take two companies each priced at a ₹2,000 crore market cap. The first carries ₹1,500 crore of debt and no cash, so its enterprise value is ₹3,500 crore. The second has no debt and ₹500 crore of cash, so its enterprise value is ₹1,500 crore. If those two businesses earn the same operating profit, the buyer of the first is paying more than twice as much for it, and the market caps said they were paying the same.
The same arithmetic explains a chart that otherwise looks alarming. A company that borrows ₹1,000 crore and pays it straight out as a special dividend sees its market cap fall by roughly the amount paid and its debt rise by the same amount, while its enterprise value barely moves. Nothing about the business changed. The claim on it was rearranged between shareholders and lenders.
Enterprise value has a cost of its own, and it is worth knowing before relying on one. Market cap is live: it moves with the last trade. The debt and cash added to it are the figures as of the company's last reported balance sheet date, so the two halves of the number are as of different moments. A company that has raised or repaid a large sum since that date carries an enterprise value that is arithmetically correct and out of date.
Which gives the practical rule. Market cap answers what the equity is priced at; enterprise value answers what the business is priced at. Any multiple built on market cap alone compares two balance sheets as though they were the same, and the balance sheet is usually the thing most worth looking at.
The other half of the multiplication moves too
Price gets the attention. The share count is treated as a constant, and it is not one.
A one-for-one bonus issue doubles the number of shares and halves the price. Market cap is unchanged, and so is what any holder owns — the same claim is simply cut into more pieces. A split does the identical thing by a different legal route. Neither event creates or destroys a rupee, though both leave an unadjusted price chart with a cliff in it while the market cap line runs smooth.
Fresh issuance is a different matter, and this is where the two numbers separate in a way that costs somebody money. Take a company with 100 crore shares at ₹100 — a market cap of ₹10,000 crore. It issues 40 crore new shares at ₹50 each, raising ₹2,000 crore, so the count goes to 140 crore and the market cap to ₹12,000 crore. The company is 20% larger by market cap. A share is now worth about ₹86, because ₹12,000 crore divided across 140 crore shares is what a share is.
An existing holder who did not participate is down roughly 14% on a company that grew by a fifth — and the discount is what did it, since shares placed below the prevailing price move value to whoever takes them up. Market cap measures the company; the share price measures your slice of it, and dilution is exactly the case where the two move in opposite directions. A buyback runs the same arithmetic in reverse, which is why it is more usefully read as a change in the denominator than as a signal about the business.
One more split in the denominator matters in India specifically. Shares outstanding and shares available to trade are different counts, because promoter holdings, strategic stakes and locked-in blocks sit outside the tradable float. Indian index providers weight constituents on the free-float portion rather than the total, as a matter of index construction rather than regulation — so two companies with the same market cap can carry quite different weights in the same index, and an index fund buys them in that proportion rather than in proportion to their size.
Large, mid and small cap are ranks, not sizes
Now the part that is specific to India, and that catches people who follow everything above without difficulty.
The large cap, mid cap and small cap labels that fund categories are built on are not defined by any rupee amount. They are defined by position in a ranked list of listed companies ordered by market capitalisation. A defined top band is large cap, the next band is mid cap, and everything below is small cap. The list is compiled and published periodically, and a revision takes effect from a stated date.
A threshold is a statement about you. A rank is a statement about everybody else. That difference produces the result nobody expects: a company can change category without its own price moving at all. Let several companies below it rally past it and its rank slips, its label changes, and its shares closed flat throughout.
Two further consequences are worth carrying:
- The rupee value of every boundary drifts with the market. After a long rise, the smallest company still counted as large cap is a considerably bigger business in rupees than the smallest large cap of several years ago — with the definition untouched throughout. "Mid cap" is not a fixed size and never was one.
- A reclassification is news about the ranking, not about the company. A business that moves from small cap to mid cap has not been upgraded by anyone. It has been overtaken by fewer companies than before.
What that does to a fund is a separate and more expensive mechanism — category rules impose minimum allocations, so a reclassified holding can have to be sold for reasons that have nothing to do with the company. That is set out in equity funds explained. The same ranking logic is what makes a size band a coherent thing to allocate to at all, which is the starting point of asset allocation.
One caveat worth carrying. How many positions each band contains, and the date a revision takes effect from, are set out in the published classification itself — and because a revision can move a company between bands without the company doing anything, those are the parts to read off the current list rather than from memory.
Five numbers people mean by 'what the company is worth'
Most disagreements about valuation are really disagreements about which of these is being quoted.
| Number | How it is built | What it answers |
|---|---|---|
| Market capitalisation | Share price × shares outstanding | What the market prices the equity at, right now, on the evidence of the shares that traded |
| Free-float market cap | Share price × shares available to trade | The size of the tradable claim — and the basis on which Indian index providers weight a constituent |
| Enterprise value | Market cap + debt − cash | What the whole business is priced at, before the capital structure is rearranged |
| Book value of equity | Assets − liabilities, from the accounts | What the equity cost historically, less depreciation — a record, not a price |
| Acquisition price | Enterprise value plus whatever control is worth to the buyer | What taking the company over actually costs |
Read the gaps rather than the rows. The first two differ by the holdings nobody is offering. The first and the third differ by the balance sheet. The third and the fifth differ by the premium needed to make unwilling holders sell — which is the number market cap cannot contain by construction, since it is priced off the people who were willing.
Book value earns its place on the list because it is what people reach for when they want an objective figure. It is objective, and it is historical: it records what was paid for the assets, net of depreciation, not what those assets now produce. A company whose main asset is a brand, a licence or a customer base can trade at many times its book value with nothing wrong with either number.
Five ways the number gets misread
Each of these produces a conclusion that sounds reasonable, which is why they survive contact with intelligent people.
1. Reading "small cap" as "small company". In a market with thousands of listed companies, a business ranked below the mid cap band can be large, profitable and a household name. The label is a position, not a description. This is the single most common misreading of the classification, and it flows directly from assuming the bands are thresholds.
2. Comparing earnings multiples across unlike balance sheets. A company priced at 20 times earnings with no debt and a company priced at 20 times earnings carrying debt equal to its market cap are not priced alike. On enterprise value the second costs roughly twice as much for the same earnings. The multiple did not lie; it was only ever a statement about the equity.
3. Treating market cap as liquidity. Suppose one company has a ₹20,000 crore market cap with 75% held by promoters, leaving a ₹5,000 crore float; another has a ₹10,000 crore market cap with 25% promoter holding and a ₹7,500 crore float. The smaller company by market cap is half again as large by tradable stock. Size and tradability are different numbers, and only one of them decides what happens when a lot of people want out on the same afternoon.
4. Treating a bucket change as a signal. A move between categories can be caused entirely by other companies. Reading it as a verdict on the business mistakes an accounting of the field for an assessment of the runner.
5. Comparing a company's market cap with its own market cap years ago. If the share count rose over that period, some of the increase was bought with fresh money rather than earned with the existing assets. Market cap over time is a fair record of the company's size and an unreliable one of a long-standing shareholder's experience — for that, the per-share numbers are the ones that answer the question.
Looking at the parts rather than the headline
Everything above reduces to one habit: never let the headline number stand in for the components it was built from. The share count, the promoter and public holdings, the debt and the cash are all disclosed, and each of them changes what the market cap means.
FNOTrader's Stocks app screens the listed universe on those components directly — market cap, promoter holding, public holding, debt, book value, price to book and traded turnover are each screenable fields, so a float can be computed from a holding pattern and a size band examined as the ranked population it actually is. The same universe, roughly 2,390 stocks and 17 NSE sector and size indices, is what the rank backtests run over.
None of that tells you what a company is worth. It tells you which of the five numbers in the table above you are currently looking at, which is the question that has to be settled first.
Common questions
What is market capitalisation?
The share price multiplied by the number of shares outstanding. A share at ₹400 with 25 crore shares outstanding gives a market cap of ₹10,000 crore. It is the market's current price for the whole of a company's equity, and it is a price rather than a measurement — set by whoever transacted most recently, in whatever quantity they happened to trade.
Is market capitalisation the same as the value of the company?
No, on two counts. It prices the equity only, so it ignores the debt a buyer would inherit and the cash a buyer would receive. And it applies a price discovered on the freely traded shares to every share in existence, including holdings that were never offered — which is why acquiring a company costs more than its market cap.
What is the difference between market cap and enterprise value?
Enterprise value is market capitalisation plus debt minus cash. The gap between the two is the balance sheet. Two companies each with a ₹2,000 crore market cap can have enterprise values of ₹3,500 crore and ₹1,500 crore if the first carries ₹1,500 crore of debt and the second holds ₹500 crore of cash — so on the same operating profit, one buyer is paying more than twice as much.
Does a stock split or bonus issue change market capitalisation?
No. A one-for-one bonus doubles the share count and halves the price, so the product is unchanged and no holder's claim has altered. A split does the same by a different legal route. Fresh issuance is the case that does change things: if the share count rises 40% while the market cap rises 20%, each share is worth less than before even though the company grew.
How are large cap, mid cap and small cap defined in India?
By rank, not by any rupee amount. Listed companies are ordered by market capitalisation; a defined top band is large cap, the next band is mid cap, and everything below is small cap. The list is compiled and published periodically and a revision takes effect from a stated date. Because it is a ranking, a company's category depends on how every other company is doing.
Can a company change category without its share price moving?
Yes, and this is the practical consequence of using a rank rather than a threshold. If enough companies ranked below it rise past it, a company slips a band with its own price flat. The reclassification is news about the ranking, not about the business — though it can still force funds in that category to buy or sell the shares.
What is free-float market capitalisation?
The share price multiplied by the shares actually available to trade, excluding promoter holdings, strategic stakes and locked-in blocks. Indian index providers weight constituents on free float rather than total market cap, so two companies of identical size can carry quite different index weights — and a large market cap with a small float is not the same thing as a liquid share.
Which number should be used to compare two companies?
It depends on what is being compared, and the two are not interchangeable. Market cap compares what the equities are priced at, which is the right question for an index weight or a size classification. Enterprise value compares what the businesses are priced at, which is the right question wherever the two carry different amounts of debt — and that is most pairs of companies.
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