Company Valuation Methods

Master common valuation methods—PE, PB, DCF, etc.—including calculation and practical application

Overview

At its core, valuation answers a simple question:

What is this company worth? At today’s price, am I overpaying or getting a bargain?

Valuation methods can be broadly grouped into two categories:

• Relative valuation:

  • Compare using “multiples”
  • Common: PE (P/E), PB (P/B), PS (P/S)
  • Analogy: checking home prices in the same neighborhood—comparing unit prices rather than pricing every brick and tile

• Absolute valuation:

  • Estimate how much cash the business can generate in the future and discount it back to today
  • The classic method: DCF (Discounted Cash Flow)
  • Analogy: buying a storefront—estimate future rent and discount it to today to see if it’s worth it

In practice:

• No one relies on a single metric to make decisions
• More commonly: use relative valuation to screen quickly, then use absolute valuation for “deep analysis”
• And then combine: industry traits, company quality, cycle position, and your own risk tolerance

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Relative Valuation

The core idea of relative valuation is:

It doesn’t directly answer “what is it worth,” but “expensive/cheap relative to what?”

PE (Price-to-Earnings)

1. Definition and calculation

Price-to-Earnings (P/E):

P/E = Share price ÷ Earnings per share (EPS) or: P/E = Market capitalization ÷ Net profit attributable to shareholders

Common variants:

• Trailing P/E: uses the most recently reported full-year net profit (historical)
• Forward P/E: uses expected future earnings (analyst forecasts or your own estimate)
• TTM P/E: uses earnings over the last 12 months (trailing twelve months)

Simple example:

Share price: 20
EPS: 2
→ P/E = 20 ÷ 2 = 10x

Interpretation: If earnings stay flat and are fully paid out as dividends with no growth, you theoretically “earn back” the investment in 10 years.

2. Use cases

Best suited for:

• Companies with stable earnings and long operating histories
• Examples: mature consumer staples, banks, insurers, mature manufacturing, etc.

Common practice:

• Cross-sectional comparison:

  • Compare P/Es across companies within the same industry (“same track” comparison)

• Time-series comparison:

  • Compare a company’s current P/E to its historical range (“its valuation center”)

Example thinking:

• A liquor company historically trades around 18–25x P/E
• Current valuation is 15x and fundamentals haven’t clearly deteriorated → may be “cheap”
• If it rises to 35x while earnings growth is only 10%, it’s clearly “expensive”

3. Caveats

• High P/E doesn’t necessarily mean expensive:

  • It may reflect a high-growth company with strong future earnings expansion

• Low P/E doesn’t necessarily mean cheap:

  • Earnings may be about to fall, or the industry may be in secular decline

• For cyclicals, look at “cycle-normal” earnings:

  • At the cycle trough, profits are low, so P/E can look extremely high or meaningless
  • At the cycle peak, profits surge, so P/E can look very low—yet risk may actually be higher

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PB (Price-to-Book)

1. Definition and calculation

Price-to-Book (P/B):

P/B = Share price ÷ Book value per share or: P/B = Market capitalization ÷ Shareholders’ equity (net assets)

Example:

Book value per share: 10
Share price: 15
→ P/B = 15 ÷ 10 = 1.5x

Interpretation: The market is willing to pay 1.5 for 1 of book net assets.

2. Use cases

Especially suitable for:

• Asset-heavy sectors, or businesses close to “asset management / asset allocation”

  • banks, insurers, brokerages
  • real estate, some capital-intensive industries

Because:

• For these industries, the core is less about “future storytelling” and more about “current asset quality” and “risk control”
• P/B roughly reflects the market’s judgment on asset quality and profitability

Common observations:

• P/B < 1:

  • the market discounts the asset value or expects weak profitability
  • could be an opportunity, or a “value trap”

• P/B significantly above peers:

  • may imply better asset quality, stronger profitability, better governance

3. Caveats

• Book value is not the same as “replacement cost”: accounting measures can differ from economic value

• For asset-light, high-tech, internet businesses, P/B is less informative:

  • real value is often in “technology, brand, users, data,” and other intangibles
  • many great companies have low book value but enormous long-term value

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PS (Price-to-Sales)

1. Definition and calculation

Price-to-Sales (P/S):

P/S = Market capitalization ÷ Revenue or: P/S = Share price ÷ Revenue per share

Example:

Market cap: 10B
Revenue (last year): 2B
→ P/S = 10 ÷ 2 = 5x

Interpretation: The market pays 5 to buy 1 of the company’s past sales.

2. Use cases

Best suited for:

• Companies with unstable profits or not yet profitable, but with fast revenue growth
• Typical: internet, SaaS, platforms, early-stage high-growth companies

Because:

• Early on, companies invest heavily in customer acquisition and R&D, depressing profits or causing losses
• P/E becomes unusable or distorted; revenue better reflects scale and growth potential

Common usage:

• Look at the combination of revenue growth + P/S, not P/S alone

  • e.g., 50% revenue growth with 10x P/S
  • if growth drops to 10% but P/S stays 10x, valuation risk rises sharply

3. Caveats

• Revenue growth is not the same as profit growth:

  • if unit economics are poor or margins are negative, high revenue alone may mean little

• “Fair” P/S varies hugely by industry—compare within the same category

• Best for estimating “ranges,” not as a standalone buy/sell trigger

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Absolute Valuation

DCF (Discounted Cash Flow)

1. Core logic

DCF (Discounted Cash Flow) is conceptually simple:

A company’s value = the sum of all future free cash flows it can deliver to shareholders, discounted back to today.

There are three key elements:

1. Future cash flows (CF):

   • usually “free cash flow to equity” or “free cash flow to the firm”
   • operating cash generated minus maintenance/necessary capital expenditures

2. Discount rate (r):

   • the required return for investing in the company
   • related to the risk-free rate, risk premium, industry risk, etc.

3. Terminal value (TV):

   • the long-term value after the explicit forecast period
   • often estimated via a “perpetual growth” model

2. Simplified formula (illustration)

Assume you explicitly forecast the next 5 years of free cash flow CF₁…CF₅, and after year 5 cash flow grows perpetually at rate g:

Value = CF₁ / (1+r)¹
      + CF₂ / (1+r)²
      + CF₃ / (1+r)³
      + CF₄ / (1+r)⁴
      + CF₅ / (1+r)⁵
      + TV / (1+r)⁵

Where:
TV = CF₅ × (1 + g) ÷ (r - g)

You don’t need to memorize the formula details. More important are:

• Are your cash flow assumptions reasonable?
• Does the discount rate match the company’s risk level?
• Is the terminal growth assumption too optimistic (g cannot exceed the economy’s long-run growth by too much)?

3. A simple analogy

Buying a storefront:

• You expect 100K in rent per year
• You require at least an 8% annual return
• Rent rises slightly over time (say 2%)

You ask:

• Given this rent level and growth, what’s the maximum I’m willing to pay for the storefront?
• DCF does the same—just replacing the “storefront” with a “company.”

4. Pros and cons of DCF

• Pros:

  • Theoretically closest to “intrinsic business value”
  • Systematically incorporates growth, profitability, investment spending, capital structure, etc.

• Cons:

  • Extremely sensitive to assumptions (growth, margins, discount rate, terminal value)
  • Small parameter changes can double or halve the valuation
  • Requires deeper business understanding and financial modeling skill

In practice:

• DCF often serves as a long-term “anchor”,

• while PE/PB/PS are used for:

  • quick comparisons, gauging market sentiment, and judging whether valuation looks rich/cheap in relative terms.

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Core Concepts

1. Price vs. value

• Price: the market’s real-time quote, driven by sentiment and flows
• Value: an estimate of intrinsic value based on future cash flows and asset quality

In the short run:

• the market is like a voting machine—whoever has more votes wins In the long run:

• the market is like a weighing machine—the company’s “weight” (real earnings and cash flow) matters more

Valuation tools help you understand the rough range of “value,” not precisely claim “this company is exactly worth 73.45 today.”

2. Margin of safety

Any valuation is an estimate with error, never perfectly accurate—so you need a margin of safety:

• If you believe “fair value” is roughly 20–25
• A truly attractive buy price might be 18 or lower

Sources of margin of safety:

• Price materially below your conservative intrinsic estimate
• A high-quality business with strong resilience

3. Matching growth with valuation

• High-growth companies can often justify higher valuation multiples
• Low-growth or negative-growth companies may not be cheap even if multiples look low

A rough rule of thumb (very approximate, intuition only):

• A company sustaining 20%+ long-term growth may not be expensive at 30–40x P/E
• A company growing only 5% may already be pricey at 20x P/E

The key question isn’t “what is the P/E,” but: Is the multiple worth it relative to growth (and quality)?

4. Matching valuation methods to business models and industry traits

• Asset-heavy, stable-profit industries: PE and PB tend to work better
• High-growth, asset-light, early-loss industries: PS + DCF matter more
• Strong cyclicals: use “normalized earnings” or “cycle-center valuation,” not just current P/E

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Practical Applications

Case 1: A mature consumer company — PE + PB

Suppose you’re analyzing a mature beverage company:

• Revenue has grown steadily at 8%–10% over the past 5 years
• Gross margin is stable, and net margin stays around 15%
• Operating cash flow roughly matches net profit, and dividends are stable

Practical approach:

1. Check historical valuation ranges:

   • Over the past 5 years, P/E mostly ranged 18–25x, and P/B 3–4x

2. Check current valuation:

   • Current P/E ~ 17x, P/B ~ 2.8x, slightly below its historical center

3. Synthesize:

   • No obvious signs of industry decline
   • Competitive position is stable
   • Valuation is modestly discounted → may be an opportunity within the value range

You can certainly do a DCF here, but often “historical multiples + steady growth” already provide a workable decision frame.

Case 2: A high-growth internet company — PS + DCF

Assume:

• Revenue grows 40% YoY, but the company is still loss-making
• Marketing and R&D investment “eat” most profits

In this case:

1. P/E is basically unusable (losses or highly unstable profits)

2. Start with P/S for relative positioning:

   • vs peers: peer average P/S is 6–8x; the company you watch is at 5x

3. Then run a simplified DCF:

   • Assume revenue growth slows over the next 3–5 years
   • Gross margin and expense ratios gradually converge toward mature-company levels
   • Estimate free cash flow over the next 5–10 years

4. Arrive at a “valuation range” and judge whether current price offers enough margin of safety

For this type of company:

• Valuation swings can be large and forecasting uncertainty is high
• It fits investors who can tolerate higher volatility

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FAQs

Q1: Does a high P/E mean I should never buy?

Not necessarily.

The key is:

• Is the high P/E driven by:

  • euphoric market sentiment?
  • or highly certain, high-quality growth over the next few years?

• If earnings can compound at 30%–40% for several years and P/E is only 25–30x,

  • it may still be attractive with a reasonable margin of safety

• Conversely, if a company is mature with low growth but trades at 40x P/E, beware of “great company, bad price.”

Q2: Different valuation methods give very different answers—what should I trust?

There’s no perfect answer. A better approach is:

1. Treat different methods as “measurements from different angles”:

   • P/E: how the market prices your earnings
   • P/B: how the market prices your book equity
   • P/S: how the market prices your scale/revenue
   • DCF: your intrinsic estimate from a cash-flow perspective

2. Focus on understanding “why the difference exists”:

   • different growth assumptions?
   • different views on margins/cash flow quality?
   • different discount rates and risk judgments?

3. Ultimately, build your own valuation range and margin of safety rather than blindly trusting any single “precise number.”

Q3: For IPOs or loss-making companies, what if P/E can’t be calculated?

Common approaches:

• Start with business model and industry runway:

  • does the business have long-term logic? is the market large enough?

• Then use:

  • P/S to compare with peers
  • simplified DCF with scenarios (bull/base/bear)

• Don’t get carried away by storytelling:

  • if the company can’t even explain the quality of revenue growth and only talks about a grand future, be cautious

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Summary

• Valuation methods broadly fall into:

  • Relative valuation: use multiples like P/E, P/B, P/S to compare with history and peers
  • Absolute valuation: use DCF to estimate discounted future cash flows

• No method is “uniquely correct.” What matters is:

  • whether the method matches the company stage and industry traits
  • whether assumptions are reasonable and conservative
  • whether you have enough margin of safety

• Practical suggestions:

  • use P/E/P/B/P/S to quickly judge the rough “rich/cheap” zone
  • for important positions or long-term holds, validate with a simplified DCF
  • treat valuation as a tool to understand business and market expectations, not a pure arithmetic exercise

Valuation isn’t about calculating a “perfect number.” It’s about seeing, behind volatile prices, the gap between long-term business value and current market sentiment.

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Further Reading

• Security Analysis — Benjamin Graham & David Dodd

  • The classic starting point for value investing and valuation thinking

• The Intelligent Investor — Benjamin Graham

  • The source of core ideas such as margin of safety and Mr. Market

• Aswath Damodaran’s books (e.g., Investment Valuation, The Little Book of Valuation)

  • Systematic coverage of DCF, multiple valuation models, and valuing different types of companies

• High-quality brokerage / investment bank deep-dive reports on individual stocks

  • Practical templates combining “valuation modeling + company understanding,” helping you apply theory to real cases