Valuation Using Multiples
A comparables approach to estimating intrinsic value
1 Introduction
How much is a company really worth? This deceptively simple question lies at the heart of investment analysis. In previous lectures, we explored discounted cash flow (DCF) methods, which estimate intrinsic value by projecting future cash flows and discounting them back to the present. While theoretically elegant, DCF analysis requires numerous assumptions about growth rates, discount rates, and terminal values—assumptions that can dramatically affect our conclusions.
Multiples valuation offers a complementary approach that sidesteps some of these challenges. Rather than building value from the ground up, multiples valuation works by comparison: if similar companies trade at certain ratios relative to their earnings, book value, or cash flows, then our target company should trade at similar ratios. This logic is intuitive and mirrors how we think about value in everyday life. When you buy a house, you don’t calculate the present value of future housing services—you look at what comparable homes in the neighborhood sold for.
This approach is sometimes called comparables valuation or simply “comps” on Wall Street. The method relies on a powerful assumption: that intrinsic value maintains a stable, predictable relationship with observable financial metrics. If Company A and Company B are truly comparable businesses, and Company A trades at 20 times earnings, then Company B should trade at approximately 20 times earnings as well. Any deviation from this relationship might signal that one company is mispriced.
In this lecture, we will examine three of the most widely used valuation multiples: the price-to-earnings (P/E) ratio, the price-to-book (P/B) ratio, and the enterprise value to EBITDA (EV/EBITDA) ratio. Each multiple captures a different dimension of value and is most appropriate in different contexts. By the end of this lecture, you will understand not only how to calculate and apply these multiples, but also when each is most appropriate and what limitations to keep in mind.
2 The General Approach to Multiples Valuation
The logic behind multiples valuation can be expressed in a simple equation. If we believe that a company’s intrinsic value (\(V\)) should be proportional to some fundamental measure (\(F\))—such as earnings, book value, or cash flow—then we can write:
\[V = M \times F\]
where \(M\) is the appropriate multiple. The challenge, of course, is determining the “correct” value of \(M\). Since we cannot observe intrinsic value directly, we estimate \(M\) by looking at how the market prices comparable companies.
There are three common approaches to estimating the appropriate multiple for a given firm. First, you can calculate the average multiple for a small group of the firm’s closest competitors—companies that operate in the same industry, serve similar customers, and have comparable business models. Second, you can use the average multiple for the entire industry, which provides a broader benchmark but may include less comparable firms. Third, you can examine the historical average of the multiple for the firm itself, asking whether current pricing is consistent with the firm’s own historical norms.
Each approach has strengths and weaknesses. Using close competitors provides the tightest comparison, but requires careful judgment about which firms are truly comparable. Industry averages are more objective but may mask important differences between firms. Historical averages capture firm-specific characteristics but assume that past relationships will persist into the future—an assumption that may not hold if the company’s fundamentals have changed.
In practice, analysts often use multiple approaches and compare the resulting valuations. Significant disagreement between methods may indicate that the firm is genuinely difficult to value, or that one set of comparables is more appropriate than another.
3 The Price-to-Earnings (P/E) Ratio
The price-to-earnings ratio is perhaps the most widely quoted valuation metric in finance. Turn on any business news channel or open any financial newspaper, and you will encounter P/E ratios within minutes. This ubiquity reflects both the intuitive appeal of the metric and its computational simplicity.
3.1 Understanding the P/E Ratio
The P/E ratio measures how much investors are willing to pay for each dollar of a company’s earnings. It is calculated as the current stock price divided by earnings per share:
\[\frac{P}{E} = \frac{\text{Price per Share}}{\text{Earnings per Share (EPS)}}\]
This per-share formulation is equivalent to dividing total market capitalization by total net income:
\[\frac{P}{E} = \frac{\text{Market Capitalization}}{\text{Net Income}}\]
A higher P/E ratio indicates that investors are paying more for each dollar of current earnings. Why would they do this? Generally, because they expect earnings to grow. A company with a P/E of 30 is expected to deliver faster earnings growth than a company with a P/E of 15, all else equal. The P/E ratio thus embeds market expectations about future profitability and growth.
3.2 Trailing, Current, and Forward P/E
The P/E ratio comes in several varieties, depending on which earnings figure is used in the denominator.
Trailing P/E uses earnings from the most recent annual report (10-K filing). This version relies on audited, verified numbers, but these figures may be several months old by the time the annual report is published.
Current P/E (also called TTM P/E, for “trailing twelve months”) uses the most recent four quarters of earnings data, typically drawn from quarterly reports. This provides a more timely picture of the company’s earnings power.
Forward P/E uses analyst forecasts of earnings for the next fiscal year. This version is forward-looking and may be more relevant for valuation purposes, but it introduces forecast uncertainty into the calculation.
When comparing P/E ratios across companies or over time, it is essential to use the same version consistently. A forward P/E of 20 is not comparable to a trailing P/E of 20—the forward version will typically be lower because it uses larger (expected future) earnings in the denominator.
3.3 Applying the P/E Ratio
To estimate a company’s intrinsic value using P/E multiples, we multiply our estimate of the appropriate P/E ratio by the company’s earnings:
\[\text{Intrinsic Value per Share} = \text{Estimated P/E} \times \text{EPS}\]
The estimated P/E typically comes from the average of comparable firms, as discussed above.
Assume that in the most recent fiscal year, Microsoft (MSFT) had earnings per share (EPS) of $5.70. Its three main competitors had trailing P/E ratios of 35, 40, and 45 respectively. Estimate the intrinsic value of a share of MSFT using this data.
Step 1: Calculate the average P/E ratio of the comparable firms.
\[\text{Average P/E} = \frac{35 + 40 + 45}{3} = \frac{120}{3} = 40\]
Step 2: Multiply the average P/E by Microsoft’s EPS to estimate intrinsic value.
\[\text{Intrinsic Value} = 40 \times \$5.70 = \$228.00\]
Based on the trailing P/E multiples of its competitors, Microsoft’s shares have an estimated intrinsic value of $228.00 per share.
Assume you estimated that Microsoft will have EPS of $5.70 in the following fiscal year, and its main competitors have forward P/E ratios of 25, 30, and 35 respectively. Estimate the intrinsic value of a share of MSFT using this data.
Step 1: Calculate the average forward P/E ratio of the comparable firms.
\[\text{Average Forward P/E} = \frac{25 + 30 + 35}{3} = \frac{90}{3} = 30\]
Step 2: Multiply the average forward P/E by Microsoft’s forecasted EPS.
\[\text{Intrinsic Value} = 30 \times \$5.70 = \$171.00\]
Using forward P/E multiples, Microsoft’s estimated intrinsic value is $171.00 per share.
Notice that this estimate is lower than the trailing P/E estimate from Example 1. This is typical—forward P/E ratios are usually lower than trailing P/E ratios because the expected growth in earnings makes the denominator larger relative to the numerator.
4 The Price-to-Book (P/B) Ratio
While the P/E ratio relates market value to earnings—a flow measure—the price-to-book ratio relates market value to book value of equity—a stock measure. This gives us a different lens through which to view valuation.
4.1 Understanding the P/B Ratio
The price-to-book ratio (also called the market-to-book ratio, or M/B) compares what investors are paying for a company’s equity to what accountants say that equity is worth on the balance sheet:
\[\frac{P}{B} = \frac{\text{Market Capitalization}}{\text{Book Value of Equity}}\]
Since book value of equity equals total assets minus total liabilities, we can also write:
\[\frac{P}{B} = \frac{\text{Market Cap}}{\text{Total Assets} - \text{Total Liabilities}}\]
A P/B ratio of 1.0 means the market values the company at exactly its book value—investors are paying $1 for each $1 of accounting equity. A P/B ratio above 1.0 indicates the market believes the company is worth more than its book value, perhaps because it has valuable intangible assets, growth opportunities, or competitive advantages not fully captured on the balance sheet.
4.2 Growth Firms vs. Value Firms
The P/B ratio has become central to a major distinction in investment analysis: the difference between growth and value stocks.
Growth firms typically have high P/B ratios. These companies trade at substantial premiums to book value because investors expect them to generate high returns on their assets and reinvest profitably. Think of technology companies with valuable intellectual property, strong brands, or network effects—assets that create value but may not appear prominently on the balance sheet.
Value firms typically have low P/B ratios. These companies trade near or even below book value, suggesting the market has modest expectations for their future profitability. Value investors specifically seek out these stocks, betting that the market has become too pessimistic and that the companies are worth more than their current prices suggest.
This growth/value distinction is so fundamental that it forms the basis for separate investment styles, separate mutual funds, and separate academic research literatures. When you hear about “value investing” in the tradition of Benjamin Graham and Warren Buffett, the P/B ratio is often a key screening criterion.
4.3 Applying the P/B Ratio
To value a company using P/B multiples, we first need to calculate the book value per share, then multiply by the estimated appropriate P/B ratio:
\[\text{Intrinsic Value per Share} = \text{Estimated P/B} \times \text{Book Value per Share}\]
where:
\[\text{Book Value per Share} = \frac{\text{Book Value of Equity}}{\text{Shares Outstanding}}\]
Assume that in the most recent fiscal year, Microsoft had book value of equity of $118 billion and 7.6 billion shares outstanding. Its main competitors had P/B ratios of 15, 20, and 25 respectively. Estimate the intrinsic value of a share of MSFT using this data.
Step 1: Calculate Microsoft’s book value per share.
\[\text{Book Value per Share} = \frac{\$118 \text{ billion}}{7.6 \text{ billion shares}} = \$15.53\]
Step 2: Calculate the average P/B ratio of the comparable firms.
\[\text{Average P/B} = \frac{15 + 20 + 25}{3} = \frac{60}{3} = 20\]
Step 3: Multiply the average P/B ratio by book value per share.
\[\text{Intrinsic Value} = 20 \times \$15.53 = \$310.60\]
Based on P/B multiples, Microsoft’s estimated intrinsic value is $310.60 per share.
5 Enterprise Value to EBITDA (EV/EBITDA) Ratio
The P/E and P/B ratios focus exclusively on equity value. But companies are financed by both equity and debt, and sometimes we want to value the entire enterprise—not just the shareholders’ stake. This is where EV/EBITDA comes in.
5.1 Understanding Enterprise Value
Enterprise value (EV) represents the theoretical takeover price of a company—what an acquirer would need to pay to buy out both equity holders and debt holders, net of any cash they would receive. The formula is:
\[\text{EV} = \text{Market Cap} + \text{Preferred Stock} + \text{Long-Term Debt} - \text{Cash and Cash Equivalents}\]
The logic is straightforward: to acquire a company, you must pay for the equity (market cap) and take responsibility for the debt. However, you also get the company’s cash, which effectively reduces your net cost. Note that “long-term debt” should include the current portion of long-term debt—amounts due within one year that still represent borrowing obligations.
In practice, analysts often use book values for debt because the market value of corporate debt can be difficult to observe. For most investment-grade companies, book and market values of debt are reasonably close.
5.2 Why EBITDA?
EBITDA stands for Earnings Before Interest, Taxes, Depreciation, and Amortization. This measure strips out financing decisions (interest), tax effects, and non-cash charges to arrive at a cleaner measure of operating cash flow generation.
EBITDA pairs naturally with enterprise value for several reasons. First, since EV includes both debt and equity, we need an earnings measure that is available to both debt and equity holders—that is, earnings before interest. Second, EBITDA removes accounting choices around depreciation methods and asset lives, making comparisons across firms cleaner. Third, EBITDA approximates the cash-generating ability of the business, which is ultimately what determines value.
5.3 The EV/EBITDA Ratio
Combining these concepts, the EV/EBITDA ratio is:
\[\frac{\text{EV}}{\text{EBITDA}} = \frac{\text{Market Cap} + \text{Preferred Stock} + \text{Long-Term Debt} - \text{Cash}}{\text{EBITDA}}\]
A lower EV/EBITDA ratio suggests a company is potentially undervalued relative to its cash flow generation; a higher ratio suggests it may be overvalued or that the market expects significant future growth.
6 Key Takeaways
Valuation using multiples provides a practical, market-based approach to estimating intrinsic value that complements more theoretical methods like discounted cash flow analysis. The core insight is elegantly simple: if comparable companies trade at similar ratios relative to their fundamentals, then any deviation from these norms might signal mispricing.
The three multiples we examined each capture different aspects of value. The P/E ratio connects market value to profitability, reflecting investor expectations about future earnings growth. A company trading at a high P/E is expected to deliver strong earnings growth; one trading at a low P/E is expected to grow more slowly or faces greater uncertainty. The P/B ratio connects market value to accounting book value, and has become central to distinguishing growth stocks (high P/B) from value stocks (low P/B). Investors using the “value” style systematically seek out low P/B stocks, betting that the market has become overly pessimistic. The EV/EBITDA ratio takes a broader view, valuing the entire enterprise rather than just equity. By relating enterprise value to operating cash flow, this multiple is particularly useful when comparing companies with different capital structures or when evaluating potential acquisitions.
Each multiple has its place in the analyst’s toolkit. P/E ratios are most meaningful for profitable, stable companies with similar accounting practices. P/B ratios are particularly useful for financial institutions or capital-intensive businesses where book value provides a meaningful anchor. EV/EBITDA ratios are preferred when comparing companies with different capital structures or when depreciation policies differ significantly across firms.
The quality of any multiples valuation depends critically on the quality of the comparables selected. A multiple derived from truly comparable firms provides a meaningful benchmark; one derived from superficially similar but fundamentally different companies may mislead. Thoughtful analysts use multiple valuation approaches, triangulating across different multiples and different sets of comparables to build confidence in their conclusions. When different approaches converge on similar values, we gain confidence. When they diverge, we have learned something important—that the company may be genuinely difficult to value, or that our choice of comparables deserves reconsideration.
7 Key Formulas Summary
| Concept | Formula | When to Use |
|---|---|---|
| P/E Ratio | \(\frac{\text{Price}}{\text{EPS}} = \frac{\text{Market Cap}}{\text{Net Income}}\) | Valuing profitable companies with stable earnings; comparing companies with similar accounting practices |
| Intrinsic Value (P/E) | \(\text{Value} = \text{Avg P/E} \times \text{EPS}\) | Estimating share price based on comparable firms’ P/E ratios |
| P/B Ratio | \(\frac{\text{Market Cap}}{\text{Book Equity}} = \frac{\text{Market Cap}}{\text{Assets} - \text{Liabilities}}\) | Valuing financial institutions, capital-intensive firms; distinguishing growth vs. value stocks |
| Intrinsic Value (P/B) | \(\text{Value} = \text{Avg P/B} \times \text{Book Value per Share}\) | Estimating share price based on comparable firms’ P/B ratios |
| Enterprise Value | \(\text{EV} = \text{Market Cap} + \text{Preferred} + \text{LT Debt} - \text{Cash}\) | Calculating total firm value for EV-based multiples |
| EV/EBITDA Ratio | \(\frac{\text{EV}}{\text{EBITDA}}\) | Comparing firms with different capital structures; evaluating acquisitions |
| Equity from EV | \(\text{Equity} = \text{EV} - \text{Debt} + \text{Cash}\) | Converting enterprise value back to equity value for per-share calculations |
8 Practice Problems
Apple Inc. reported EPS of $6.42 in its most recent fiscal year. Three of its closest competitors in the consumer electronics space have trailing P/E ratios of 28, 32, and 38 respectively. Using the multiples approach, estimate the intrinsic value of a share of Apple.
Step 1: Calculate the average P/E ratio of the comparable firms.
\[\text{Average P/E} = \frac{28 + 32 + 38}{3} = \frac{98}{3} = 32.67\]
Step 2: Multiply the average P/E by Apple’s EPS to estimate intrinsic value.
\[\text{Intrinsic Value} = 32.67 \times \$6.42 = \$209.74\]
Based on trailing P/E multiples, Apple’s estimated intrinsic value is $209.74 per share.
Analysts forecast that Nvidia will earn $2.85 per share in the upcoming fiscal year. Its main competitors in the semiconductor industry have forward P/E ratios of 42, 48, and 54 respectively. Estimate the intrinsic value of a share of Nvidia using forward P/E multiples.
Step 1: Calculate the average forward P/E ratio.
\[\text{Average Forward P/E} = \frac{42 + 48 + 54}{3} = \frac{144}{3} = 48\]
Step 2: Multiply by Nvidia’s forecasted EPS.
\[\text{Intrinsic Value} = 48 \times \$2.85 = \$136.80\]
Using forward P/E multiples, Nvidia’s estimated intrinsic value is $136.80 per share.
JPMorgan Chase has a book value of equity of $340 billion and 2.85 billion shares outstanding. Its main competitors—Bank of America, Wells Fargo, and Citigroup—have P/B ratios of 1.1, 1.0, and 0.6 respectively. Estimate the intrinsic value of a share of JPMorgan using P/B multiples.
Step 1: Calculate JPMorgan’s book value per share.
\[\text{Book Value per Share} = \frac{\$340 \text{ billion}}{2.85 \text{ billion shares}} = \$119.30\]
Step 2: Calculate the average P/B ratio.
\[\text{Average P/B} = \frac{1.1 + 1.0 + 0.6}{3} = \frac{2.7}{3} = 0.90\]
Step 3: Multiply the average P/B by book value per share.
\[\text{Intrinsic Value} = 0.90 \times \$119.30 = \$107.37\]
Based on P/B multiples, JPMorgan’s estimated intrinsic value is $107.37 per share.
Note: A P/B ratio below 1.0 suggests the market values these banks at less than their book equity—a common occurrence for financial institutions facing profitability challenges or elevated risk perceptions.
Amazon had EBITDA of $85 billion in the most recent fiscal year and has 10.3 billion shares outstanding. The company has $67 billion in long-term debt and $86 billion in cash. Its e-commerce and cloud computing competitors have EV/EBITDA ratios of 18, 22, and 28 respectively. Estimate the intrinsic value of a share of Amazon.
Step 1: Calculate the average EV/EBITDA ratio.
\[\text{Average EV/EBITDA} = \frac{18 + 22 + 28}{3} = \frac{68}{3} = 22.67\]
Step 2: Estimate Amazon’s enterprise value.
\[\text{Estimated EV} = 22.67 \times \$85 \text{ billion} = \$1,926.95 \text{ billion}\]
Step 3: Convert enterprise value to equity value.
\[\text{Equity Value} = \$1,926.95 - \$67 + \$86 = \$1,945.95 \text{ billion}\]
Step 4: Calculate the per-share intrinsic value.
\[\text{Intrinsic Value per Share} = \frac{\$1,945.95 \text{ billion}}{10.3 \text{ billion shares}} = \$188.93\]
Based on EV/EBITDA multiples, Amazon’s estimated intrinsic value is $188.93 per share.
9 Ask an LLM
Here are three questions you might ask an AI assistant to deepen your understanding of these concepts:
- Why might a company have a negative P/E ratio, and how should analysts handle valuation when earnings are negative? What alternative multiples become more appropriate in such cases?
- How do accounting differences across countries (such as IFRS vs. GAAP) affect the comparability of P/E and P/B ratios for multinational companies, and what adjustments might analysts make?
- When would it be appropriate to use industry median multiples rather than mean multiples, and how might outliers in a peer group distort valuation estimates?
- Can you walk me through how the P/E ratio is mathematically related to expected growth rates using the Gordon Growth Model? What does this relationship tell us about when high P/E ratios are justified?