Investment Risk Scanner (Buffett + Porter Framework)

Investment risk scanner using Buffett + Porter's Five Forces framework. Triggers when users ask "analyze XXX's risk", "is this project legit", "can I buy this stock", "Buffett framework check", "is this business model sustainable", "Ponzi", "subsidy dependent", "loss making", "valuation". 5-layer Buffett framework + Porter's Five Forces as complementary check. Built-in cases: Qutoutiao, StepN, WeWork, Quibi, Tesla, NVDA, PLTR, COIN, AMC, RIVN, BYD, Geely. Key addition: Supply Chain Finance risks (迪链-type tools), Hidden liabilities, OCF quality analysis.

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 🚨

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⚠️ CRITICAL: OCF Source Quality Analysis

New mandatory check — Never look at OCF in isolation!

OCF Quality Matrix

OCF Source	Quality	Example
Real product/service sales	✅ Clean	Apple iPhone sales
From supplier financing (欠供应商钱)	⚠️ Dirty	迪链模式 ⚠️
From customer advance payments	⚠️ Dirty	预售模式
From regulatory subsidies	⚠️ Conditional	EV补贴
From working capital manipulation	🚨 Dangerous	延付供应商+提前收客户

The 迪链 Lesson (BYD case):

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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 ≈ ？

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Part 1: Five-Layer Buffett Framework

Layer 1: Business Model

Check	Pass ✅	Danger 🚨
Subsidy test	Users stay without incentive	🚨 No (Qutoutiao/StepN)
Moat describable?	Clear description	🚨 Vague
Competitor replication time	>3 years	🚨 Cloneable anytime
DCF/Owner Earnings	Positive or estimable	⚠️ Unclear

Layer 2: Unit Economics

Check	Formula	Danger Signal
User value	Ad revenue > incentive cost?	Qutoutiao style 🚨
Token value	Real cash flow support?	StepN style 🚨
Lending model	Rate > cost + defaults?	P2P style 🚨
Gross margin	>15% (industrial)	Below = weak ⚠️
Revenue vs FCF quality	Is growth funded by real economics?	⚠️

Layer 3: Management

Check	Pass ✅	Danger 🚨
Skin in Game	Major personal stake	🚨 Barely holds shares
Track record	Delivers on promises	🚨 Misses commitments
Narrative	Talks about moat	🚨 Only talks about growth
Incentives	Aligned with shareholders	🚨 Misaligned
Supplier relations	Treats suppliers fairly	🚨 Exploits suppliers

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

Layer 4: Valuation & Margin of Safety

Check	Pass ✅	Danger 🚨
DCF estimable?	Reasonable assumptions	🚨 Pure speculation
Margin of safety?	>30%	🚨 Zero margin
Sustainable growth?	<3%	�️ 5%+ unrealistic
Growth quality?	Organic	🚨 Fundraising-dependent

Quantitative Thresholds:

Metric	Safe ✅	Warning ⚠️	Danger 🚨
Forward P/E	<20x	20-40x	>40x
PEG Ratio	<1.0	1.0-2.0	>2.0
P/S	<2x	2-5x	>5x
P/B	<3x	3-8x	>8x
FCF	Positive	Breakeven	Persistent negative
ROE	>15%	8-15%	<8%
Net Margin	>10%	3-10%	<3%
Debt/Equity	<30%	30-60%	>60%

Layer 5: Structural Risk

Check	Red Flag 🚩
Liquidity	Runway <12 months
Regulation	Depends on regulatory arbitrage
Technology	Single-tech dependency
Competition	Rapidly disrupting industry
Geopolitics	Major market concentration
Supply Chain Finance	Relies on supplier financing (迪链-type) 🚨

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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

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

Force 1: Bargaining Power of Suppliers

Supplier Power	Implication	Example
Weak (fragmented)	Company can extract value	BYD vs small suppliers ✅
Strong (concentrated)	Suppliers capture value	Rare earth miners 🚨
Danger Pattern	Company survives by squeezing suppliers	迪链模式 ⚠️

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

Force 2: Bargaining Power of Buyers

Buyer Power	Implication	Example
Weak (fragmented)	Company sets prices	Apple App Store ✅
Strong (concentrated)	Buyers extract value	Car dealers vs OEMs ⚠️
In EV market	Price war = buyer power HIGH	Bad for all EV makers ⚠️

Force 3: Competitive Rivalry

Competition Level	Signal	Example
Low	Moat is real	Apple's ecosystem ✅
High (price war)	Commodity trap	China EV market 🚨
Price War = Maturity Stage	Buffett: "bad industry"	EV 2024-2026 ⚠️

Force 4: Threat of New Entrants

Barrier to Entry	Pass	Fail
Capital requirements	High barrier ✅	Low barrier 🚨
Network effects	Strong barrier ✅	No barrier 🚨
Regulatory barriers	Protects incumbent ✅	Open competition 🚨

Force 5: Threat of Substitutes

Substitute Risk	Example
Low	iPhone → App Store ecosystem ✅
High	Fuel car → EV ⚠️
Very High	Physical retail → E-commerce 🚨

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

🚨 New Mandatory Check

Ask this for every company:

Check	Question	Danger Signal
Supply chain financing	Does company use supplier financing tools?	迪链/商票模式 ⚠️
Scale	How large is supply chain finance?	>20% of OCF 🚨
Supplier dependency	Are suppliers highly dependent on this company?	Yes = systemic risk ⚠️
What-if scenario	What if sales drop 30%? Can suppliers survive?	Supplier collapse = company risk ⚠️

The 迪链 Pattern (Case Study)

text

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

Flag	What It Means
Company brags about "zero-interest supplier financing"	They're extracting from suppliers ⚠️
Supplier Average Payment Period > 180 days	Likely using supply chain finance ⚠️
Reported debt low but company dominates suppliers	Hidden leverage ⚠️
Industry has "dominant player" + weak suppliers	Systemic risk if dominant player stumbles ⚠️

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Part 4: Hidden Liabilities Checklist

🚨 New Section — Always Check These

Hidden Liability	How to Detect	Risk Level
Supply chain financing (迪链)	Notes payable + accounts payable days	🚨 High
Operating lease obligations	Off-balance sheet leases	⚠️ Medium
Product warranties/recalls	Accumulated warranty reserves	⚠️ Medium
Environmental remediation	EPA-type obligations	⚠️ Medium
Pension underfunding	Pension assets vs liabilities	⚠️ Medium
Related party guarantees	Guarantees on affiliate debt	🚨 High
Sales-type leasing (dealer inventory)	Auto manufacturers special	🚨 High

Formula for Real Net Debt:

text

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

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Part 5: Industry Lifecycle Check

Which Stage Is This Industry In?

Stage	Characteristics	Investment Implication
Introduction	High growth, unproven model	High risk, high reward
Growth	Revenue growing 20%+, competition emerging	Buy if moat forming
Mature	Growth <10%, price war begins	⚠️ Buffett: "bad industry"
Decline	Revenue shrinking, overcapacity	🚨 Avoid

The Price War Signal:

text

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"

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Updated Case Library

Project	Type	Conclusion
Qutoutiao	Ponzi-lite	🚨 Avoid — no moat, DCF always negative
StepN	Ponzi-lite	🚨 Avoid — token has no cash flow, Ponzi structure
WeWork	Turnaround trap	🚨 Avoid — no moat, management failure
Quibi	Concept failure	🚨 Avoid — no user stickiness, unit economics collapsed
AMC	Meme-stock Ponzi	🚨 Avoid — dilution machine, bankruptcy risk
RIVN	EV price war victim	🚨 Avoid — burning cash, no clear path to profit
COIN	Crypto policy bet	🚨 High Risk — regulatory uncertainty is existential
TSLA	Dream stock	🚨 High Risk — PE 341, Elon Musk concentration risk
PLTR	Government dependency	⚠️ Watch — AIP promising but PE 500+ is rich
NVDA	AI infrastructure moat	⚠️ Watch — real moat but fully priced in
BYD	EV with hidden supply chain risk	🚨 Watch — PE 19.7x cheap BUT ¥4000B+ 迪链 ⚠️⚠️
Geely	Cheap EV, strong founder	⚠️ Watch — PE 11x extremely cheap, FCF positive

BYD Analysis (Updated with 迪链 Finding)

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

Risk	Level	Note
迪链 Supply Chain Finance	🚨 ¥4000B+ hidden	Real net debt ¥3230B vs reported ¥277B
Price War	🚨 Extreme	China EV = mature stage, price war
Geopolitical	🚨 High	US 100% tariff, EU tariffs
OCF Quality	⚠️ Mixed	Real ¥593B + supplier financing
Moat Sustainability	⚠️ Uncertain	Moat based partly on supplier extraction

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

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Output Format Template (Updated)

text

## 🎯 [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]"

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

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Cross-Stock Comparison Template (Updated)

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| 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

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Quantitative Decision Matrix

When scoring, use 1-5 stars:

Score	Meaning	Action
⭐⭐⭐⭐⭐ (5)	Exceptional — rare opportunity	Strong buy
⭐⭐⭐⭐ (4)	Good — meets all criteria	Buy on dips
⭐⭐⭐ (3)	Average — mixed signals	Watch only
⭐⭐ (2)	Below average — multiple concerns	Avoid or sell
⭐ (1)	Poor — fails most tests	Avoid

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

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Key Lessons from Recent Cases

The 迪链 Lesson (BYD)

text

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

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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?

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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)