Relative Valuation models are widely used in financial analysis to determine a company’s worth by comparing it with similar firms using valuation multiples. These models do not rely on absolute intrinsic value calculations like the Dividend Discount Model (DDM) or Discounted Cash Flow (DCF) but instead assess how a company’s valuation compares to industry peers.
Among various valuation multiples, the Price-to-Earnings (P/E) ratio is the most commonly used. Other key ratios include the Price-to-Book (P/B) ratio, Price-to-Sales (P/S) ratio, Enterprise Value-to-EBITDA (EV/EBITDA) ratio, and Price-to-Cash Flow (P/CF) ratio.
1. Price-to-Earnings (P/E) Ratio
The P/E ratio compares a company’s stock price to its earnings per share (EPS). It indicates how much investors are willing to pay for each unit of earnings and helps assess whether a stock is overvalued, undervalued, or fairly priced compared to its industry peers.
Formula
P/E = Market Price per Share / Earnings per Share (EPS)
Interpretation
- A high P/E ratio suggests that investors expect higher future growth. However, it could also indicate an overvalued stock.
- A low P/E ratio may signal undervaluation or weak future growth expectations.
- The P/E ratio varies across industries, so comparing it within the same sector is crucial.
Example
If a stock’s market price is ₹200, and its EPS is ₹10, the P/E ratio is:
P/E = 200 / 10 = 20
This means investors are willing to pay ₹20 for every ₹1 of earnings.
Limitations
- Not useful for companies with negative earnings.
- Can be misleading if earnings are volatile or manipulated.
2. Price-to-Book (P/B) Ratio
The P/B ratio compares a company’s market price to its book value (net assets) and indicates whether a stock is undervalued or overvalued relative to its assets.
Formula
P/B = Market Price per Share / Book Value per Share (BVPS)
Interpretation
- P/B < 1: The stock is undervalued, possibly a good buy.
- P/B > 1: The stock is overvalued relative to its book value.
- Useful for industries with tangible assets, like banking and manufacturing.
Example
If a company’s stock price is ₹150, and its book value per share is ₹100, then:
P/B = 150 / 100=1.5
Investors are paying ₹1.50 for every ₹1 of net assets.
Limitations
- Not suitable for companies with intangible assets (e.g., technology firms).
- Book value may not reflect the actual market value of assets.
3. Price-to-Sales (P/S) Ratio
The P/S ratio measures a company’s stock price relative to its revenue per share. It is useful for valuing companies with negative earnings or high growth potential.
Formula
P/S = Market Capitalization / Total Revenue
Interpretation
- A low P/S ratio suggests an undervalued stock, while a high P/S ratio may indicate overvaluation.
- Useful for comparing startups and companies in cyclical industries.
Example
If a company has a market capitalization of ₹500 crore and annual revenue of ₹100 crore, then:
P/S = 500 / 100=5
This means investors pay ₹5 for every ₹1 of sales revenue.
Limitations
- Does not account for profitability.
- Revenue does not always translate into profits.
4. Enterprise Value-to-EBITDA (EV/EBITDA) Ratio
The EV/EBITDA ratio is a popular valuation metric that compares a company’s enterprise value (EV) to its earnings before interest, taxes, depreciation, and amortization (EBITDA). It provides a clearer valuation picture, as it accounts for both debt and equity.
Formula
EV/EBITDA = Enterprise Value / EBITDA
Where:
EV = Market Capitalization + Total Debt − Cash
Interpretation
- Lower EV/EBITDA: The company may be undervalued.
- Higher EV/EBITDA: The stock might be overvalued.
- Used for mergers and acquisitions (M&A) valuation.
Example
If a company’s EV is ₹1,000 crore, and EBITDA is ₹200 crore, then:
EV/EBITDA = 1000 / 200 = 5
This means investors value the company at 5 times its EBITDA.
Limitations
- EBITDA ignores changes in working capital.
- Not useful for companies with negative earnings.
5. Price-to-Cash Flow (P/CF) Ratio
The P/CF ratio compares a company’s stock price to its cash flow per share. It is more reliable than P/E because cash flow is harder to manipulate than earnings.
Formula
P/CF = Market Price per Share / Cash Flow per Share
Interpretation
- Lower P/CF ratio: The stock is undervalued.
- Higher P/CF ratio: Investors expect strong future growth.
- Useful for industries with high depreciation costs (e.g., telecom, energy).
Example
If a company’s stock price is ₹300, and cash flow per share is ₹50, then:
P/CF = 300 / 50 = 6
This means investors are paying ₹6 for every ₹1 of cash flow.
Limitations
- Does not consider capital expenditures (CapEx).
- Different industries have varying cash flow patterns.
Conclusion
Relative valuation models provide a practical approach to stock valuation by comparing financial multiples across similar companies or industries.
- P/E Ratio: Most widely used; best for mature firms.
- P/B Ratio: Suitable for asset-heavy industries.
- P/S Ratio: Best for startups or companies with negative earnings.
- EV/EBITDA Ratio: Used for mergers, accounts for debt.
- P/CF Ratio: More reliable than P/E, as cash flow is harder to manipulate.
