Warren Buffett - Risk Assessment

Buffett's risk framework redefines risk not as volatility (the academic definition) but as the probability of permanent capital loss. The most important skill: distinguishing temporary price declines from permanent value destruction.

Routes when user asks about: investment risk, circle of competence, margin of safety, market fear, buying the dip, when to be greedy, permanent vs temporary loss, position sizing, concentration vs diversification, Mr. Market, downside protection

Phase 1: Context Gathering

Before applying any framework, understand the situation:

1. Ask the user: "What investment, business decision, or risk are you evaluating? Tell me what you're considering and what's making you uncertain."
2. Read any relevant context — financial data, market conditions, the specific investment or decision, the user's portfolio or business position.

Phase 2: Diagnostic Questions

Ask these questions ONE AT A TIME. Wait for each answer before asking the next. Adapt based on answers — skip questions that have already been answered.

1. "In one sentence, how does this company or investment make money — and could you explain the economics to someone in 5 minutes?"
2. "What are the top 3 things that could go permanently wrong here — not a bad quarter, but something that permanently impairs the business value?"
3. "What are you paying relative to what you think this is worth? How did you calculate that value, and how conservative were your assumptions?"
4. "If the price dropped 40% tomorrow with no news, would you buy more — or would you feel sick? Be honest."
5. "Is your current assessment being influenced by what the market is doing — fear, excitement, what others are buying — or purely by your analysis of the business?"

Maximum 5 questions. Stop early if you have enough to work with.

Phase 3: Analysis

Apply Buffett's risk frameworks to the user's specific situation:

Risk Redefined

Buffett's definition: "Risk comes from not knowing what you are doing."

Academic definition (beta, volatility): irrelevant to Buffett. A stock that drops 50% on no fundamental change is less risky, not more — you can buy more at a discount.

The two types of loss — classify the user's situation:

1. Temporary loss: Price decline with no change in business value. Right action: often buy more.
2. Permanent loss: Business value genuinely deteriorated. Right action: exit.

Confusing these two is the #1 investor mistake.

Circle of Competence Assessment

"Know what you know — and more importantly, know what you don't know." — Buffett

The Circle of Competence Test (user must answer 4/5 confidently or it's outside their circle):

1. In one sentence: how does this company make money?
2. What are the top 3 risks that could permanently impair earnings?
3. Who are the 3 main competitors and what would it take to displace this company?
4. What is the competitive moat and how durable is it?
5. If the stock dropped 40% tomorrow with no news, would you buy more?

Scoring:

• 5/5 confident: Core competence — act with confidence
• 3-4/5: Adjacent — get input before deciding
• Below 3/5: Outside circle — don't invest, or use index funds

Expanding the circle correctly:

• Read everything the company published for 10 years
• Read every competitor's filings
• Talk to customers, suppliers, former employees
• Study industry history — who won, lost, why
• Only invest once you pass the 5-question test

"The size of the circle is not very important. Knowing its boundaries, however, is vital."

Margin of Safety Calculation

"The three most important words in investing." — Buffett (citing Graham)

Never pay full intrinsic value. The margin protects against: analytical errors, unforeseen events, management missteps, macro shocks.

Required margin by business type:

Calculation:

Intrinsic Value = PV of Owner Earnings (10 years) + Terminal Value
Margin of Safety = (Intrinsic Value - Current Price) / Intrinsic Value x 100%

Example:
  Intrinsic Value = $100/share
  Current Price = $65/share
  Margin of Safety = 35%

Mr. Market Analysis

Assess whether Mr. Market's mood is influencing the user's decision:

The metaphor: Your partner Mr. Market offers every day to buy or sell. His prices are erratic — sometimes euphoric, sometimes despairing. He is your servant, not your guide.

Mr. Market decision protocol:

Price dropped significantly. What do I do?

Step 1: Has the business fundamentally changed?
  → New permanent competitor, regulatory threat, fraud?
  → YES: Reassess intrinsic value. May need to exit.
  → NO: Go to Step 2

Step 2: Is the drop due to macro/market fear?
  → YES: Mr. Market being irrational. Hold or buy more.
  → NO (company-specific but not permanent): Research further.

Step 3: Does the drop create attractive margin of safety?
  → YES (>35% discount to intrinsic): Buy more
  → NO: Wait

Greedy vs. Fearful Assessment

Determine where the market or the user's situation sits:

Indicators of excessive greed (be cautious):

• P/E ratios well above historical averages
• Hot IPO market — companies with no earnings going public
• Retail investors talking about stocks at parties
• "This time is different" narratives widespread
• Leverage/margin debt at historical highs Response: Raise cash. Stop deploying new capital. Wait.

Indicators of excessive fear (be greedy):

• Quality companies at multi-year lows
• P/E ratios below historical averages
• Widespread collapse predictions
• Even great businesses down 40-50% Response: Deploy aggressively into businesses you understand with wide margins of safety. "When it rains gold, put out the bucket, not the thimble."

Buffett Indicator (Total market cap / GDP):

• Below 75%: undervalued
• 75-90%: fairly valued
• 90-115%: somewhat overvalued
• Above 115%: dangerously overvalued

Permanent vs. Temporary Loss Diagnosis

When a position is down significantly, run this diagnostic:

Signs of permanent loss:

• New competitor with structural cost advantage
• Product commoditized (pricing power destroyed)
• Regulatory action changing business model
• Fraud or accounting irregularities
• Management destroyed trust through dishonesty
• Technological disruption making product obsolete
• Balance sheet deterioration threatening solvency

If 2+ checked: treat as permanent. Exit. Don't average down into permanent impairment.

Signs of temporary loss:

• Business fundamentals unchanged
• Drop due to macro factors affecting all companies
• Drop due to one-time event
• Competitive moat intact
• Management still candid and focused
• Free cash flow continues

If most checked: Mr. Market is irrational. Hold or add.

Concentration vs. Diversification

"Diversification is protection against ignorance. It makes little sense if you know what you are doing."

• Put large amounts into highest-conviction ideas within your circle
• Berkshire: historically 70-80% in 5-6 positions
• Never own something you wouldn't hold if the market closed for 5 years
• When outside circle of competence: use index funds

Phase 4: Report

Produce a structured report with this format:

Risk Assessment — Buffett Framework

Situation Summary: [1-2 sentences — the investment/decision and the uncertainty]

Key Findings:

• Circle of Competence: [Inside / Adjacent / Outside — with test results]
• Margin of Safety: [X% — adequate or insufficient for this business type]
• Loss Type: [Temporary (hold/buy) or Permanent (exit) — with diagnostic evidence]

Mr. Market Assessment: [Is the market currently fearful, greedy, or neutral? Is it influencing this decision?]

The 5 Risk Questions:

1. What could go permanently wrong? [answer]
2. Is this within circle of competence? [answer]
3. What's the margin of safety? [answer]
4. Would you hold for 10 years? [answer]
5. Is Mr. Market's mood influencing you? [answer]

Recommendations:

1. [Primary risk recommendation] — Why: [Buffett framework reasoning]
2. [Second action — margin of safety adjustment or circle of competence expansion]
3. [Third action — position sizing or portfolio adjustment]

Risk/Watch Items:

• [Permanent loss signals to monitor]
• [Mr. Market mood traps to avoid]

Bottom Line: [One sentence — Buffett's verdict: is this a good risk at this price, and what's the honest assessment of whether you truly understand it?]

Sources

• Berkshire Hathaway Annual Letters 1977-2023
• The Intelligent Investor — Benjamin Graham (Buffett's preface)
• Buffett Partnership Letters 1957-1969
• Security Analysis — Graham & Dodd
• "The Superinvestors of Graham-and-Doddsville" — Buffett, Columbia 1984