Based on Lin Anji (林安霁), 巴菲特的估值逻辑 (Buffett's Valuation Logic)
Lin Anji deconstructs Warren Buffett's valuation methodology by analyzing dozens of actual Berkshire Hathaway investments across different decades and sectors. The book's central argument is that Buffett's approach, while often described in vague platitudes ("buy wonderful companies at fair prices"), follows a rigorous and systematic valuation logic that can be formalized and applied by other investors.
The author organizes Buffett's valuation logic into three interconnected systems:
System 1: INTRINSIC VALUE — Calculate what a business is actually worth based on
its future cash flows, discounted to present value.
System 2: COMPETITIVE MOAT — Assess whether the business has durable advantages that
protect its earning power for decades.
System 3: MARGIN OF SAFETY — Only buy when market price is significantly below
intrinsic value, providing a cushion against errors.
The book traces how Buffett's methodology evolved over time:
Phase 1 (1957-1969): Graham-style "cigar butt" investing
- Buy statistically cheap stocks (below net current asset value)
- Purely quantitative, no qualitative moat assessment
- High diversification (20-30+ positions)
Phase 2 (1970-1990): Transition to quality investing (Munger influence)
- Buy "wonderful businesses at fair prices" instead of "fair businesses at wonderful prices"
- Begin incorporating competitive advantage analysis
- Moderate concentration (10-15 positions)
Phase 3 (1990-present): Mature framework
- Intrinsic value based on owner earnings + moat durability
- Willing to pay higher PE for businesses with wider moats
- High concentration (5-10 positions = 80%+ of portfolio)
- Holding period: "forever" for truly great businesses
Lin Anji argues that Chinese investors can apply Buffett's valuation logic but must adapt for A-share market realities:
Adaptation Required | Reason
-------------------------------------------|--------------------------------------
Higher discount rate for DCF | Higher risk-free rate in China
Shorter moat assessment period | Faster competitive disruption in China
More attention to policy/regulatory risk | Government intervention more common
Lower threshold for "cheap enough" | A-shares more volatile, more opportunities
Shorter holding periods in practice | Market cycles more compressed
The foundation of Buffett's valuation is "owner earnings" — a measure Buffett defined as more meaningful than reported earnings:
Owner Earnings = Net Income
+ Depreciation & Amortization
+ Other Non-Cash Charges
- Average Annual Maintenance Capital Expenditure
- Changes in Working Capital (normalized)
Key distinction from Free Cash Flow:
- FCF subtracts ALL capex (maintenance + growth)
- Owner Earnings subtracts only MAINTENANCE capex
- Growth capex is value-creating and should not be deducted
Intrinsic Value = Σ (Owner Earnings in Year t) / (1 + discount rate)^t
+ Terminal Value / (1 + discount rate)^n
Buffett's typical parameters (as analyzed by Lin Anji):
Discount Rate: 10% (roughly the long-term equity market return)
Buffett uses the same rate for all businesses, arguing that if a business
doesn't merit the general equity return, he simply won't invest.
Growth Rate: Conservative estimate of sustainable owner earnings growth
- Typically 3-8% for mature businesses
- Never above 15% even for high-growth businesses
- Growth rate used is BELOW analyst consensus (margin of safety)
Terminal Value: Perpetuity method with 3% terminal growth rate
TV = Owner Earnings × (1 + g) / (discount rate - g)
TV = OE × 1.03 / (0.10 - 0.03) = OE × 14.7
Projection Period: 10 years of explicit forecast + terminal value
The book reveals that Buffett often uses simplified mental models rather than full DCF:
Shortcut 1: EARNINGS YIELD vs BOND YIELD
If Owner Earnings / Price > 10-year government bond yield × 2:
The stock is potentially undervalued.
Shortcut 2: INITIAL YIELD + GROWTH
Expected return ≈ (Owner Earnings / Price) + Expected Growth Rate
If this exceeds 15%, the investment is attractive.
Shortcut 3: PE RATIO RELATIVE TO GROWTH
For a business growing earnings at G%, a PE of G × 1.0 to G × 1.5 is reasonable.
PE < G × 1.0 = undervalued. PE > G × 2.0 = overvalued.
Shortcut 4: PAYBACK PERIOD
At current owner earnings, how many years to "earn back" the purchase price?
Buffett typically targets a 10-year or less payback for excellent businesses.
Chinese market DCF adjustments:
- Discount rate: 12% (vs 10% for US) — reflects higher risk-free rate and market risk
- Terminal growth: 4-5% (vs 3% for US) — higher nominal GDP growth assumption
- Explicit forecast period: 5-7 years (vs 10 for US) — less visibility in China
- Earnings quality haircut: Apply 10-20% discount to reported earnings to account for
lower accounting standards and potential manipulation in some A-share companies
Lin Anji categorizes the moats Buffett looks for into five types:
Moat Type | Description | Examples from Buffett's Portfolio
------------------|------------------------------------|---------------------------------
Brand power | Consumer trust and pricing power | Coca-Cola, See's Candies
Switching costs | Pain of changing to competitor | Apple ecosystem, banking relationships
Network effects | Value increases with more users | American Express, Visa
Cost advantages | Structural cost leadership | GEICO, Nebraska Furniture Mart
Regulatory moat | Government licenses/barriers | BNSF Railway, utilities
MOAT DURABILITY CHECKLIST:
□ Has the company maintained or grown market share for 10+ years?
□ Has the company maintained gross margins above industry average for 10+ years?
□ Has the company earned ROE > 15% for 10+ years WITHOUT excessive leverage?
□ Can you articulate why a competitor with $1 billion could NOT replicate this business?
□ Has the competitive advantage grown STRONGER over the past decade?
□ Is the industry structure stable (not being disrupted by technology)?
□ Does management allocate capital to strengthen the moat (not just pay dividends)?
Scoring:
- 7/7: Wide moat (premium valuation justified)
- 5-6/7: Narrow moat (moderate premium acceptable)
- 3-4/7: Questionable moat (require significant discount)
- 0-2/7: No moat (do not invest regardless of price)
Buffett's favorite financial metric for moat assessment:
ROE = Net Income / Shareholders' Equity
Quality ROE decomposition (DuPont):
ROE = Net Margin × Asset Turnover × Equity Multiplier
PREFERRED: High ROE from high margins (pricing power = strong moat)
ACCEPTABLE: High ROE from high asset turnover (efficiency = operational moat)
DANGEROUS: High ROE from high leverage (financial engineering = no moat)
Buffett's threshold:
- ROE > 20% sustained over 10 years = strong moat indicator
- ROE > 15% sustained over 10 years = moderate moat indicator
- ROE < 15% or inconsistent = weak or no moat
Franchise Business (Invest): | Commodity Business (Avoid):
---------------------------------------|---------------------------------------
Pricing power (can raise prices) | Price taker (market sets price)
High returns on incremental capital | Low returns on incremental capital
Customer loyalty / brand attachment | Customers choose on price alone
Barriers to entry for competitors | Easy entry for new competitors
Grows value over time | Value erodes over time
Earns above cost of capital | Earns at or below cost of capital
Examples: | Examples:
Kweichow Moutai (茅台) | Generic steel producers
Apple | Most airlines
Visa/Mastercard | Commodity chemical companies
Margin of Safety = (Intrinsic Value - Market Price) / Intrinsic Value
Buffett's framework (as analyzed by Lin Anji):
Business Quality | Required Margin of Safety
---------------------|---------------------------
Wide moat, stable | 20-25% minimum
Narrow moat | 30-40% minimum
Turnaround situation | 50%+ minimum
Cyclical business | Buy only at cycle trough PE
The margin of safety protects against three types of errors:
1. VALUATION ERROR: Your intrinsic value estimate may be too high
- Growth assumptions too optimistic
- Competitive advantage less durable than assumed
- Earnings quality lower than reported
2. UNFORESEEN EVENTS: Things you cannot predict
- Economic recession
- Regulatory change
- Industry disruption
- Management misconduct
3. TIMING ERROR: Even if the valuation is correct, the market may take years to recognize it
- Opportunity cost of capital tied up in a "dead" position
- Psychological burden of unrealized losses
A sufficient margin of safety means you can be partially wrong and still make money.
DO NOT INVEST even if the company seems wonderful if:
- Intrinsic value depends heavily on assumptions about the next 3+ years
- The company has no track record (startup / IPO)
- The industry is undergoing rapid technological change
- Accounting quality is questionable
- The margin of safety is less than 20% for even the best businesses
Lin Anji analyzes each major Buffett investment through a consistent framework:
For each investment:
1. What was the intrinsic value estimate at the time of purchase?
2. What was the competitive moat assessment?
3. What price did Buffett pay, and what was the margin of safety?
4. What was the outcome, and did the original thesis play out?
5. What can Chinese investors learn from this specific case?
COCA-COLA (1988):
- Purchased at ~15x earnings after the 1987 crash
- Moat: Unassailable global brand, distribution network, switching costs (taste preference)
- Owner earnings growth: ~15% annually at time of purchase
- Margin of safety: ~30% (PE compressed below intrinsic value due to market-wide panic)
- Lesson: The best time to buy great businesses is during market-wide panic, not company-
specific bad news.
SEE'S CANDIES (1972):
- Purchased for $25M with $2M net income (12.5x earnings)
- Moat: Regional brand loyalty, premium positioning, minimal capital requirements
- Key insight: See's could raise prices every year without losing customers (pricing power)
- By 2007, generating $82M pre-tax on minimal reinvested capital
- Lesson: A business that earns high returns on MINIMAL capital is worth far more than
a business that earns high returns on LARGE amounts of capital.
WASHINGTON POST (1973):
- Purchased at ~$80M market cap when Buffett estimated intrinsic value at $400M+
- Moat: Local newspaper monopoly (pre-internet era)
- Margin of safety: ~80% (purchased during Watergate/Nifty Fifty collapse)
- Lesson: Extreme margin of safety can exist when the market is panicking about temporary
issues while the business's competitive position remains intact.
APPLE (2016-2018):
- Purchased at ~10-12x earnings
- Moat: Ecosystem switching costs, brand loyalty, services revenue
- Key shift in Buffett's thinking: a technology company CAN have a durable moat
- Lesson: Moat analysis must evolve with changing competitive dynamics. What matters is
customer lock-in, not the industry label.
□ UNDERSTANDABILITY: Can you explain the business model in one paragraph?
□ MOAT ASSESSMENT: Score 5/7 or higher on the moat durability checklist
□ FINANCIAL QUALITY: ROE > 15% for 10 years, manageable debt, growing owner earnings
□ MANAGEMENT QUALITY: Rational capital allocation, insider ownership, track record
□ VALUATION: Price below intrinsic value with adequate margin of safety (20%+ for wide moat)
□ CATALYST (optional): Identifiable reason the market may recognize value (not required)
□ PORTFOLIO FIT: Position does not create excessive sector or factor concentration
If ANY of the first five criteria fail, DO NOT INVEST regardless of how cheap the stock appears.
"It is better to buy a wonderful company at a fair price than a fair company at a wonderful price."
However, even wonderful companies must be bought at reasonable prices:
Quality Level | Maximum Entry PE (for mature businesses)
---------------------|------------------------------------------
Wide moat, 15%+ ROE | Up to 25x trailing earnings
Narrow moat, 12%+ ROE| Up to 18x trailing earnings
No clear moat | Do not buy (regardless of price)
Cyclical businesses | Buy at trough earnings, not based on PE
Growth businesses | PE ≤ 1.5x growth rate (PEG ≤ 1.5)
For all businesses: Entry price must imply a 10%+ expected annual return over 10 years.
Buffett's baseball analogy: Unlike baseball, in investing there are no called strikes.
You can watch thousands of pitches (opportunities) go by without penalty.
You only need to swing when you see a fat pitch — the perfect combination of
wonderful business + cheap price + clear moat.
Implementation:
- Maintain a watchlist of 20-30 "wonderful businesses" with estimated intrinsic values
- Update intrinsic values quarterly
- Set price alerts at your "buy" price (intrinsic value minus margin of safety)
- When an alert triggers, verify the thesis is still intact
- If thesis intact AND price below target: buy aggressively
- If thesis has deteriorated: update intrinsic value, possibly remove from watchlist
Buffett's holding period is "forever" for the best businesses, but Lin Anji identifies three legitimate sell triggers:
Sell Trigger 1: MOAT DETERIORATION
The competitive advantage that justified the investment is weakening.
Signs:
- Market share declining for 2+ consecutive years
- Gross margins compressing persistently
- ROE declining below 15% without clear temporary cause
- New competitor has structurally disrupted the business model
Action: Sell regardless of profit or loss.
Sell Trigger 2: EXTREME OVERVALUATION
Market price exceeds 2x your intrinsic value estimate.
Even Buffett occasionally sells when prices become absurd.
Caution: This should be rare for truly great businesses.
Action: Trim 30-50% (not necessarily exit entirely).
Sell Trigger 3: BETTER OPPORTUNITY
You find a significantly better investment that requires capital.
The opportunity cost of holding the current position exceeds the expected return.
Threshold: New opportunity must offer 50%+ higher expected return to justify switching.
Action: Sell weakest holding to fund the stronger opportunity.
DO NOT sell merely because:
- The stock price has dropped (if thesis is intact, this is a buying opportunity)
- The stock price has risen significantly (great businesses compound for decades)
- A macro event creates short-term uncertainty (Buffett bought during every crisis)
- You are "bored" with the position (patience is the edge)
- Analysts have downgraded the stock (analysts follow price, not the other way around)
- You want to "lock in profits" (tax drag and reinvestment risk)
Buffett's actual portfolio concentration (Berkshire Hathaway):
- Top 5 holdings: ~70-80% of equity portfolio
- Top 10 holdings: ~90% of equity portfolio
Recommended for individual investors applying this framework:
- Core positions: 5-8 stocks, each 10-20% of portfolio
- Satellite positions: 2-4 stocks, each 3-8% of portfolio
- Total positions: 7-12 maximum
- Cash reserve: 10-30% (higher when opportunities are scarce)
"Diversification is protection against ignorance. If you know what you are doing,
it makes little sense." — Buffett
Buffett's definition of risk: The probability and magnitude of permanent capital loss.
NOT risk: Temporary price volatility (this is actually opportunity).
Permanent capital loss occurs when:
1. You overpaid for a business that is worth less than you estimated
2. The business's competitive position permanently deteriorated
3. You were forced to sell during a downturn (leverage → margin call)
4. Management destroyed value through bad capital allocation or fraud
Protection against permanent loss:
1. Margin of safety in purchase price
2. Rigorous moat analysis
3. No leverage (Buffett never uses margin in his personal portfolio)
4. Ability to hold through downturns (long-term capital only)
RULE: Do not use leverage to buy stocks.
Rationale:
- Leverage transforms temporary price declines into permanent capital losses
- Even if your analysis is correct, leverage can force liquidation before the thesis plays out
- Buffett has leverage through insurance float, but this is permanent, non-callable capital
— fundamentally different from margin borrowing
The only acceptable "leverage" is the natural operating leverage within the businesses you own
(which you assess as part of the moat analysis).
Buffett's required temperament traits (per Lin Anji's analysis):
1. INDEPENDENT THINKING: Form your own opinion on value. Ignore market consensus.
2. PATIENCE: Wait years for the right opportunity. Do nothing when nothing should be done.
3. DECISIVENESS: When the opportunity arrives, act with conviction and size.
4. EQUANIMITY: Treat gains and losses with equal composure.
5. INTELLECTUAL HONESTY: Admit when you are wrong. Update your thesis when facts change.
6. LONG-TERM ORIENTATION: Think in decades, not quarters.
"Know your circle of competence, and stay within it."
Implementation:
1. List industries you genuinely understand (not just "like" or "read about")
2. For each industry, list what you know that the average investor does not
3. If you cannot articulate a genuine informational or analytical edge, the industry
is outside your circle
4. NEVER invest outside your circle no matter how attractive the opportunity appears
5. Gradually expand your circle through deep study (months/years, not days)
For Chinese investors, common circles of competence:
- Consumer brands they personally use and understand
- Technology sectors they work in professionally
- Local businesses whose operations they can observe directly
- Industries where Chinese companies have global competitive advantages
"The market is a voting machine in the short run and a weighing machine in the long run."
Practical application:
- Treat daily price movements as OFFERS, not INFORMATION
- Mr. Market offers to buy from you or sell to you every day
- You have no obligation to accept any offer
- When Mr. Market is panicking (prices far below intrinsic value): BUY from him
- When Mr. Market is euphoric (prices far above intrinsic value): SELL to him
- Most days: IGNORE him entirely
Mistake #1: USING PEAK EARNINGS IN DCF
Using the highest recent earnings as the base for projections.
Fix: Use average owner earnings over a full business cycle (5-7 years).
Mistake #2: GROWTH RATE EXTRAPOLATION
Assuming current high growth rates will continue indefinitely.
Fix: Never use growth rates above 10% for more than 3-5 years in DCF.
Revert to 3-5% for terminal value.
Mistake #3: IGNORING CAPITAL REQUIREMENTS
Treating all earnings as "free" without accounting for reinvestment needs.
Fix: Always calculate OWNER EARNINGS (after maintenance capex), not net income.
Mistake #4: USING TOO LOW A DISCOUNT RATE
Using the current risk-free rate (which may be historically low) as discount rate.
Fix: Use a minimum 10% discount rate (12% for Chinese stocks) regardless of rates.
Mistake #5: ANCHORING TO HISTORICAL PRICE
"It was ¥100 before, so ¥60 must be cheap."
Fix: Price history is irrelevant. Only the relationship between current price and
intrinsic value matters.
Mistake #6: CONFUSING GROWTH WITH MOAT
A fast-growing company is not necessarily one with a competitive advantage.
Fix: Ask "Can this growth be replicated by a well-funded competitor?"
Mistake #7: IGNORING MOAT EROSION
Assuming a moat that existed 10 years ago still exists today.
Fix: Re-evaluate moat annually. Look for early signs of disruption.
Mistake #8: MISTAKING SIZE FOR MOAT
Being large is not itself a competitive advantage.
Fix: Ask "Does being larger make this company MORE profitable per unit?"
Mistake #9: SELLING WINNERS, HOLDING LOSERS
Selling the best performing stock to "lock in gains" while holding deteriorating positions.
Fix: Evaluate each position independently. Would you buy it today at today's price?
Mistake #10: ACTION BIAS
Feeling the need to constantly buy and sell.
Fix: The number of transactions is not correlated with returns. Less is usually more.
STEP 1: BUSINESS IDENTIFICATION
Company: Leading Chinese condiment manufacturer (hypothetical, modeled on industry leaders)
Initial observation: Brand recognized by 90%+ of Chinese households
Industry: Consumer staples — defensive, recession-resistant
STEP 2: MOAT ASSESSMENT (Score: 6/7)
□ Market share stable for 10+ years? YES — #1 with 15% market share, stable
□ Gross margin above industry average? YES — 45% vs industry 30%
□ ROE > 15% for 10 years? YES — average 25% over past decade
□ Could a competitor with ¥1B replicate this? NO — brand trust built over decades
□ Competitive advantage strengthening? YES — market share slowly growing
□ Industry structure stable? YES — condiments not subject to tech disruption
□ Management strengthening moat? MIXED — some unnecessary diversification
→ MOAT RATING: Wide moat (6/7)
STEP 3: INTRINSIC VALUE CALCULATION
Current owner earnings: ¥2.5 billion
Growth assumption: 10% for years 1-5, 6% for years 6-10, 4% terminal
Discount rate: 12%
Year 1-5 OE: ¥2.75, ¥3.03, ¥3.33, ¥3.66, ¥4.02 billion
Year 6-10 OE: ¥4.26, ¥4.52, ¥4.79, ¥5.08, ¥5.38 billion
Terminal value: ¥5.38 × 1.04 / (0.12 - 0.04) = ¥69.9 billion
PV of explicit cash flows: ¥24.8 billion
PV of terminal value: ¥22.5 billion
Total intrinsic value: ¥47.3 billion
Per-share intrinsic value: ¥47.3B / 1.1B shares = ¥43/share
STEP 4: MARGIN OF SAFETY DETERMINATION
Required margin for wide moat business: 25%
Buy price: ¥43 × (1 - 0.25) = ¥32/share maximum
STEP 5: WAITING FOR THE PITCH
Current market price: ¥50/share — too expensive.
Set alert at ¥32.
Wait. (This may take months or years. Patience is the strategy.)
STEP 6: THE OPPORTUNITY ARRIVES
18 months later, during a broad market correction:
Market price drops to ¥30/share (below ¥32 target).
Verify thesis: moat intact, earnings on track, no fundamental deterioration.
→ THESIS INTACT. EXECUTE BUY.
STEP 7: POSITION SIZING AND ENTRY
Portfolio: ¥2,000,000
Position size: 15% = ¥300,000
Shares: ¥300,000 / ¥30 = 10,000 shares
Buy 10,000 shares at ¥30/share
STEP 8: HOLDING AND MONITORING
Quarterly review checklist:
- Are earnings growing as expected? YES (12% growth in latest quarter)
- Is market share stable/growing? YES
- Is ROE above 15%? YES (24% latest)
- Any moat deterioration signs? NO
- Has intrinsic value changed materially? Slightly up (updated to ¥46)
→ CONTINUE HOLDING
STEP 9: OUTCOME (3 years later)
Stock price: ¥55/share
Intrinsic value (updated): ¥52/share
Stock is now at 106% of intrinsic value — no longer has margin of safety
Dividends received: ¥3.50/share total over 3 years
Decision: Continue holding (moat intact, not egregiously overvalued)
Would only sell if: price exceeds 2x intrinsic (¥104), or moat deteriorates
Unrealized gain: (¥55 - ¥30) × 10,000 = ¥250,000 (83%)
Plus dividends: ¥35,000
Total return: ¥285,000 on ¥300,000 invested = 95% over 3 years (~25% annualized)
"Intrinsic value is not a precise number — it is a range. The margin of safety exists
precisely because our estimate of intrinsic value is imprecise."
"The three most important words in investing are 'margin of safety.' The next three
most important words are 'circle of competence.'"
"Buffett does not predict the economy, interest rates, or the stock market. He predicts
one thing: whether a specific business will earn more money in 10 years than it does today,
and whether he is paying a reasonable price for that future earning power."
"Return on equity is not just a financial metric — it is a measure of the business's
competitive advantage. High ROE sustained over decades requires a moat."
"The difference between a value trap and a value opportunity is the moat. Both look cheap.
Only the one with a moat will recover."
"Chinese investors often confuse Buffett's simplicity with naivety. His valuation logic
is rigorous — he simply expresses it in plain language."
"Buffett's greatest edge is not analytical — it is temperamental. He can wait years for
the right pitch while others feel compelled to swing at every ball."
"Never use DCF to justify a price you have already decided to pay. Valuation must come
BEFORE the purchase decision, not after."
"The best investment is one where the business gets better every year, the moat gets wider
every year, and you never have to sell."
"Owner earnings are what the owner could withdraw from the business without impairing its
competitive position. Net income is an accounting fiction. Owner earnings are economic reality."
Implementation specification compiled from Lin Anji (林安霁), 巴菲特的估值逻辑. This document is a systematic distillation for practical application and does not replace reading the original work.