When you look at a company in the stock market, you may see terms like large-cap, mid-cap, or small-cap.
These terms are linked to market capitalization.
Market capitalization, often called market cap, helps investors understand the size of a listed company based on its market value.
In this guide, we will explain what market capitalization means, how it is calculated, and why it matters to investors.
What Is Market Capitalization?
Market capitalization is the total market value of a company’s outstanding shares.
It is calculated using a simple formula:
Market Capitalization = Share Price × Number of Outstanding Shares
For example, suppose a company has 10 lakh outstanding shares.
If each share trades at ₹100, the market capitalization would be:
₹100 × 10,00,000 = ₹10 crore
Therefore, the company’s market capitalization would be ₹10 crore based on that share price.
How Does Market Capitalization Change?
Market capitalization changes when the company’s share price changes.
For example, suppose a company has 10 lakh outstanding shares.
Its share price is ₹100.
Its market capitalization is therefore ₹10 crore.
Now, if the share price rises to ₹120, the market capitalization becomes:
₹120 × 10,00,000 = ₹12 crore
So, the market capitalization has increased.
This is why market cap can change every trading day.
What Are Large-Cap, Mid-Cap and Small-Cap Companies?
Companies are often grouped by their market capitalization.
In India, the classification of large-cap, mid-cap and small-cap companies follows the framework prescribed by SEBI and used by mutual funds and other market participants.
In simple terms:
Large-Cap Companies
These are companies that fall within the largest segment of the market based on market capitalization.
They are generally more established businesses.
However, large-cap does not mean risk-free.
Mid-Cap Companies
Mid-cap companies fall between large-cap and small-cap companies in terms of market capitalization.
They may have established businesses with further growth potential.
Their share prices can still experience significant movements.
Small-Cap Companies
Small-cap companies belong to the smaller segment of the market by market capitalization.
Some may have significant growth opportunities.
At the same time, their shares can experience higher volatility and liquidity risks.
Why Is Market Capitalization Important?
Market capitalization gives investors a quick way to understand the relative size of a company.
It can also help investors compare companies within an industry or sector.
For example, an investor researching two companies can look at their market capitalization as one part of the analysis.
However, market cap should not be used alone.
Investors may also consider:
- Revenue
- Profit
- Debt
- Cash flow
- Valuation
- Business model
- Industry conditions
- Growth prospects
- Risk factors
Therefore, market capitalization is a useful starting point rather than a complete investment analysis.
Market Capitalization vs Share Price
A common beginner mistake is to assume that a higher share price means a company is larger.
That is not necessarily true.
Consider two companies.
Company A
Share price = ₹500
Outstanding shares = 1 lakh
Company B
Share price = ₹100
Outstanding shares = 10 lakh
Company B has the lower share price. However, its market capitalization is higher because it has more outstanding shares.
This shows why share price alone cannot tell you the size of a company.
Does Market Capitalization Show Company Value?
Market capitalization represents the market value of a company’s outstanding equity shares.
However, it should not be confused with the complete value of the business.
For example, a company’s debt, cash and other financial factors are not captured simply by multiplying the share price by outstanding shares.
Therefore, investors may use other measures when analysing the overall value and financial position of a company.
Is a Large-Cap Company Less Risky?
Market capitalization alone cannot determine the risk of an investment.
Large companies can also face business, market and economic risks.
Similarly, mid-cap and small-cap companies can have different levels of volatility and risk.
Therefore, investors should study the company’s financial position, business model, valuation and other relevant factors before making an investment decision.