Stock Valuation Multiples: P/E, P/S, EV/EBITDA and How to Use Them
Bull and bear sculptures outside the Frankfurt Stock Exchange. Sculptor: Reinhard Dachlauer. Photo: Eva K., 2007 / Wikimedia Commons. CC BY-SA 2.5.
Stock valuation multiples compare a company’s market valuation with its financial results. P/E relates equity value to earnings, P/S relates it to revenue, and EV/EBITDA compares enterprise value with earnings before interest, taxes, depreciation and amortization. Together, they help investors investigate differences between businesses. A lower figure alone does not establish undervaluation or predict investment returns.
What Are Stock Valuation Multiples?
A multiple expresses valuation as a number of times a financial measure. For example, a P/E of 15x means that market equity value represents 15 times the relevant annual earnings. Company valuation multiples make businesses of different sizes easier to compare, but only when their activities and financial definitions are sufficiently similar.
Investors use these measures to screen companies, examine changes over time and investigate market expectations. The arithmetic stays simple; deciding whether the inputs are comparable takes more work. Each ratio answers a different question, so selecting the denominator matters as much as calculating the result.
P/E Ratio
The P/E ratio, or price-to-earnings ratio, relates market equity value to earnings attributable to common equity holders. It can also be calculated using market price per unit of common equity and the corresponding earnings per unit. For a straightforward company with no preferred equity, the aggregate calculation is market capitalization divided by net income.
P/E = Market capitalization ÷ Annual net income attributable to common equity holders.
Consider a hypothetical company with a market capitalization of $600 million and relevant annual net income of $40 million. Its P/E is 600 ÷ 40 = 15x. This describes its earnings valuation; it does not mean an investor will recover their investment in 15 years.
A trailing P/E uses historical earnings, commonly the latest 12 months. A forward P/E uses forecast earnings, which may change. Negative earnings generally make P/E unsuitable for a conventional comparison, while unusually high cyclical profits can make the ratio look deceptively low.
The Frankfurt Stock Exchange trading floor. Archival photograph from 2015. Photo: Ank Kumar / Wikimedia Commons. CC BY-SA 4.0.
P/S Ratio
The P/S ratio, or price-to-sales ratio, compares market equity value with revenue. Unlike P/E, it can remain calculable when a business reports a net loss. However, revenue does not show how much remains after operating costs, financing expenses and taxes.
P/S = Market capitalization ÷ Annual revenue.
If the same hypothetical company generates $300 million in annual revenue, its P/S is 600 ÷ 300 = 2x. The market therefore values its common equity at twice annual revenue. This says nothing by itself about whether its margins can support that valuation.
P/S can provide a starting point when earnings are negative or temporarily distorted. Compare businesses with similar revenue models and examine their margins alongside the ratio. Because P/S excludes debt from its numerator, different financing structures can also weaken the comparison.
EV/EBITDA: How It Helps Value a Company
EV/EBITDA compares enterprise value with earnings before interest, taxes, depreciation and amortization. Unlike P/E, it pairs a valuation covering debt and equity financing with an earnings measure before interest. This can help compare operating businesses with different financing structures, although those differences still require investigation.
EV/EBITDA = Enterprise value ÷ Annual EBITDA.
For a simple capital structure, enterprise value equals market capitalization plus interest-bearing debt minus cash and cash equivalents. More complex calculations may also include preferred equity and noncontrolling interests. Lease obligations require consistent treatment across the peer group.
Suppose the example company has $150 million of debt, $50 million of cash and $70 million of EBITDA. Its simplified enterprise value is $600 million + $150 million − $50 million = $700 million. EV/EBITDA is therefore 700 ÷ 70 = 10x.
EBITDA is not cash flow. It does not capture capital expenditure or changes in working capital, and it excludes interest and taxes. Check reconciliations carefully when companies report adjusted EBITDA: similar labels can conceal different exclusions.
Which Multiples Measure Profitability?
P/E, P/S and EV/EBITDA are valuation measures rather than profitability ratios. They connect market valuation with financial performance. Profitability ratios instead examine how much profit a business generates from revenue, assets or equity, providing context for interpreting its valuation.
- Net profit margin = Net income ÷ Revenue × 100%. This shows the proportion of revenue remaining as net profit.
- Operating profit margin = Operating profit ÷ Revenue × 100%. This helps assess profitability before financing costs and taxes.
- Return on equity = Net income attributable to common equity holders ÷ Average common equity × 100%. Debt levels and a small equity base can affect its interpretation.
For the hypothetical company, net profit margin is $40 million ÷ $300 million × 100% = approximately 13.3%. A peer with the same P/S but a much lower margin has different earnings economics. That difference needs explaining before either valuation is described as relatively attractive.
How to Compare Companies Using Valuation Multiples
A comparison starts with matching the businesses, not sorting the ratios. Companies sharing an industry label can still differ in customer mix, geography, growth and capital requirements. A useful valuation multiples comparison records these differences alongside the figures.
- Select peers with similar business models, revenue sources and operating markets.
- Use a common valuation date and comparable reporting periods. Keep trailing figures separate from forecasts.
- Verify definitions against financial reports, including earnings adjustments, debt, cash and EBITDA reconciliations.
- Calculate relevant multiples alongside margins, growth, leverage and cash generation. Investigate large gaps rather than automatically excluding them.
- Explain what could justify each premium or discount, then test whether the conclusion changes under less favorable assumptions.
The resulting comparison should show both the numbers and their limitations. When reviewing opportunities on the Regolith Marketplace, distinguish the underlying company’s valuation from the terms of the specific participation format. A company-level multiple cannot establish whether a particular opportunity suits an investor.
How to Find Potentially Undervalued Stocks Using Multiples
A valuation below comparable peers can identify a business for further research. The next task is to determine whether weaker prospects or greater risks explain the difference. Review recurring earnings, competitive position, financing needs and cash generation before interpreting the discount.
For example, a company at 10x earnings may initially look inexpensive beside peers at 15x. But if a one-off gain inflated its earnings, the comparison could reverse after adjustment. A peer discount can disappear when ordinary earnings replace a temporary profit spike.
Use several defensible assumptions rather than treating the peer average as a required valuation. A separate cash-flow assessment can help test the expectations embedded in the multiples. Neither approach establishes a certain future market price.
Market displays and traders’ workstations in Frankfurt. Archival photograph from 2015. Photo: Ank Kumar / Wikimedia Commons. CC BY-SA 4.0.
Limitations of Multiples-Based Valuation
Stock multiples depend on market prices, accounting choices and the quality of the selected benchmark. An entire peer group can carry demanding valuations, while historical averages may reflect business conditions that no longer apply. Forward ratios add uncertainty because their denominators rely on forecasts.
Public-market comparisons also need care when applied to private businesses. Limited disclosure, restricted liquidity and different contractual rights can affect the relevance of a quoted-company benchmark. Regolith offers access to private-market opportunities, but the platform describes private investments as highly risky and illiquid, with the possibility of total capital loss.
FAQ
What is the P/E ratio in simple terms?
P/E expresses market equity value as a multiple of relevant annual earnings. A figure of 15x means that valuation equals 15 times those earnings; it is not a promised payback period.
What does the P/S ratio show?
P/S relates market equity value to annual revenue. It can support comparisons when earnings are negative, but it does not measure margins or include debt in its numerator.
What is considered a good P/E ratio?
There is no universal threshold. Interpretation depends on growth expectations, earnings quality, financing risk and comparable businesses, using a consistent calculation basis.
Which multiples are commonly used to value stocks?
P/E, P/S and EV/EBITDA are common starting points. Their usefulness depends on the business and whether earnings, revenue or EBITDA provides a meaningful comparison.
Can valuation multiples identify undervalued stocks?
They can highlight potential valuation discrepancies for investigation. They cannot independently establish undervaluation, explain every discount or predict the timing and direction of market movements.
