🎯 Investment Risk Scanner — Buffett + Porter Framework

Core Question

"What happens if the subsidies stop?" + "Where does the OCF actually come from?"

• Users still stay without incentive? → Probably OK ✅
• OCF comes from real business, not supplier/customer financing? → Clean ✅
• Users leave immediately? → Ponzi-lite 🚨

⚠️ CRITICAL: OCF Source Quality Analysis

New mandatory check — Never look at OCF in isolation!

OCF Quality Matrix

The 迪链 Lesson (BYD case):

BYD OCF = ¥593亿 → Looks great!
BUT: ¥4000亿+ 迪链规模 = OCF partially from supplier financing
Real business OCF ≈ ¥593亿 - 供应商资金占用 ≈ ？

Part 1: Five-Layer Buffett Framework

Layer 1: Business Model

Layer 2: Unit Economics

Layer 3: Management

Quantitative: Founder/stakeholder ownership >20% = strong signal ✅

Layer 4: Valuation & Margin of Safety

Quantitative Thresholds:

Layer 5: Structural Risk

Part 2: Porter's Five Forces (Complementary Framework)

Why add Porter's Five Forces?

Buffett's blind spot: He focuses on "Is this a good business?" but misses "How does industry structure determine profitability?"

The 迪链 lesson: BYD looked great by Buffett metrics (OCF ¥593B, PE 19.7x) but Porter's Five Forces would immediately ask:

"Why can BYD extract ¥4000B+ from suppliers?" → Supplier power is weak → Unstable moat

The Five Forces

                    New Entrants
                        ↓
            ┌───────────────────────────┐
            │    Industry Competition   │
            │   (Price War = High)     │
            └───────────────────────────┘
            ↑                           ↑
  Suppliers ←                           → Buyers
(Weak = Good)                       (Competitive = Bad)

Force 1: Bargaining Power of Suppliers

Critical Check: If a company's "moat" is based on supplier exploitation, how sustainable is it?

Force 2: Bargaining Power of Buyers

Force 3: Competitive Rivalry

Force 4: Threat of New Entrants

Force 5: Threat of Substitutes

Part 3: Supply Chain Finance Risk (迪链-Type)

🚨 New Mandatory Check

Ask this for every company:

The 迪链 Pattern (Case Study)

Company Profile:
- OCF: ¥593B positive ✅
- Apparent debt: ¥277B (5% of liabilities) ✅
- Reality: ¥4000B+ 迪链 (supply chain financing) ⚠️
- Real net debt: ¥3230B (vs reported ¥277B) 🚨

Key Insight:
OCF ¥593B ≠ "Great business"
OCF ¥593B = "Real business ¥593B" + "Supplier financing ¥???B"

Danger: If monthly sales drop below threshold (BYD: ~150k/month),
suppliers face cash crunch → systemic redemption crisis

Red Flags for Supply Chain Finance

Part 4: Hidden Liabilities Checklist

🚨 New Section — Always Check These

Formula for Real Net Debt:

Real Net Debt = Reported Net Debt
              + Supply Chain Finance (迪链-type)
              + Operating Lease PV
              + Pension Underfunding
              + Related Party Guarantees
              - Excess Cash above operational needs

Part 5: Industry Lifecycle Check

Which Stage Is This Industry In?

The Price War Signal:

Mature/Decline Indicators:
- Industry-wide price cuts
- "Winner takes all" narrative
- Capacity expansion despite declining margins
- Weak players not exiting
→ Buffett 1977: "In bad industries, even brilliant management fails"

Updated Case Library

BYD Analysis (Updated with 迪链 Finding)

Updated structural risk: 🔴 Extremely High (was "High")

New Conclusion: ⚠️ Watch — But with much higher risk than surface metrics show

Output Format Template (Updated)

## 🎯 [Name] Risk Assessment

### 📋 Inspection Results
| Dimension | Result | Note |
|-----------|--------|------|
| Business Model | ✅/⚠️/🚨 | [One sentence] |
| Unit Economics | ✅/⚠️/🚨 | [One sentence] |
| Management | ✅/⚠️/🚨 | [One sentence] |
| Valuation | ✅/⚠️/🚨 | [One sentence] |
| Structural Risk | Low/Med/High/🔴 Extreme | [Key risks] |

### 🔍 OCF Quality Analysis [NEW]
| OCF Component | Amount | Quality |
|---------------|--------|---------|
| Real business OCF | ¥XXX | ✅ Clean |
| Supplier financing | ¥XXX | ⚠️ Dirty |
| Customer advances | ¥XXX | ⚠️ Conditional |
| **Total Reported OCF** | ¥XXX | [Mix assessment] |

### ⚠️ Porter's Five Forces Summary
| Force | Level | Implication |
|-------|-------|-------------|
| Supplier Power | Strong/Weak | [Note] |
| Buyer Power | Strong/Weak | [Note] |
| Competitive Rivalry | High/Med/Low | [Note] |
| New Entrant Threat | High/Med/Low | [Note] |
| Substitute Threat | High/Med/Low | [Note] |

### ⚠️ Key Risks
1. [Most serious risk — include hidden liabilities if found]
2. [Secondary risk]
3. [Other observations]

### ✅ Potential Upsides
1. [If any]
2. [If any]

### 📊 Quantitative Scorecard
| Metric | Value | Signal |
|--------|-------|--------|
| Forward P/E | xxx | ✅/⚠️/🚨 |
| PEG | xxx | ✅/⚠️/🚨 |
| ROE | xxx | ✅/⚠️/🚨 |
| FCF | xxx | ✅/⚠️/🚨 |
| Real Net Debt | xxx (vs reported yyy) | ⚠️ Hidden risk |
| Debt/Equity | xxx | ✅/⚠️/🚨 |

### 📌 Framework Quotes
> "[Relevant Buffett quote]"
> "[Relevant Porter insight]"

---
**Overall**: □ Investable  □ Watch  □ Avoid

Cross-Stock Comparison Template (Updated)

| Metric | [Stock A] | [Stock B] | Winner |
|--------|-----------|-----------|--------|
| Market Cap | $X | $Y | [A/B] |
| Forward P/E | Xx | Yx | ✅ Cheaper |
| **Real Net Debt** | ¥X (rep ¥Y) | ¥X (rep ¥Y) | ⚠️ Hidden risk |
| **OCF Quality** | Clean/Mixed/Dirty | Clean/Mixed/Dirty | ✅ Cleaner |
| ROE | X% | Y% | ✅ Higher |
| Net Margin | X% | Y% | ✅ Higher |
| FCF | $X | $Y | ✅ Better |
| Debt/Equity | X% | Y% | ✅ Lower risk |
| Supplier Power Dependency | High/Med/Low | High/Med/Low | ⚠️ Risk |
| Founder Ownership | X% | Y% | ✅ Stronger |
| Moat Depth | Strong/Med/Weak | ... | ... |
| Price War Resilience | Strong/Med/Weak | ... | ... |
| Industry Lifecycle | Intro/Growth/Mature/Decline | ... | ... |

Overall: □ [A]  □ [B]  □ Tie

Quantitative Decision Matrix

When scoring, use 1-5 stars:

Final Score = Average of 5 layers Penalty: If hidden liabilities >50% of reported → automatic downgrade 1 star

Key Lessons from Recent Cases

The 迪链 Lesson (BYD)

What we missed: OCF ¥593B looked great, but didn't ask "HOW?"
Buffett asks: "Is this a good business?"
Porter asks: "Why can this company extract ¥4000B from suppliers?"
Answer: Because suppliers are weak → Not a sustainable moat
New rule: Always ask "Where does the OCF actually come from?"

The Correct Process

1. Buffett Layer 1-5: Check business quality
2. OCF Quality Check: Is OCF from real business or financing?
3. Porter Five Forces: Why does industry structure allow this?
4. Hidden Liabilities: What's NOT on the balance sheet?
5. Industry Lifecycle: Is this a price war (mature) industry?

Related Resources

• Buffett Moat Framework: [[护城河 (Moat) - 投资概念]]
• Buffett Valuation: [[内在价值 (Intrinsic Value)]]
• Safety Margin: [[安全边际 (Margin of Safety)]]
• Complete checklist: Feishu Wiki (投资风险快筛表)