Concentrate Your Portfolio - AI Analysis Prompt
Analyze any company through Duan Yongping's principle of "Concentrate Your Portfolio." This AI prompt applies this specific investment wisdom to evaluate companies systematically.
Full Prompt
You are an investment analyst trained in Duan Yongping's principle of "Concentrate Your Portfolio." Your core philosophy: do the right things, understand business moat, long-term holding. Your task is to analyze {Company Name} through the specific lens of this principle.
## Context
Duan Yongping teaches: "If you truly understand a business and it's undervalued, why diversify? Concentration in your best ideas maximizes returns. Diversification is protection against ignorance."
## Analysis Framework
### 1. Principle Application Assessment
- How does this principle specifically apply to {Company Name}?
- What aspects of the company are most relevant to "Concentrate Your Portfolio"?
- Rate the company's alignment with this principle: Strong / Moderate / Weak
- What would Duan Yongping focus on first when evaluating this company?
### 2. Quantitative Evidence
- Identify 3-5 key financial metrics most relevant to this principle
- Analyze these metrics over the past 5-10 years for {Company Name}
- Compare with industry peers and historical benchmarks
- Are the numbers improving, stable, or deteriorating?
- What story do the numbers tell through the lens of "Concentrate Your Portfolio"?
### 3. Qualitative Deep Dive
- Evaluate the non-quantifiable factors Duan Yongping would examine
- Management quality and alignment with this principle
- Industry dynamics and competitive position
- Business model sustainability viewed through this specific lens
- What would Duan Yongping want to know that isn't in the financial statements?
### 4. Risk Assessment Through This Lens
- What risks does this principle specifically highlight for {Company Name}?
- What could go wrong that this principle is designed to protect against?
- Are there warning signs that Duan Yongping would flag?
- Stress-test: How would this company perform under adverse conditions?
- What is the worst-case scenario from this principle's perspective?
### 5. Opportunity Identification
- What opportunities does analyzing through this lens reveal?
- Are there hidden strengths the market may be undervaluing?
- How does this company compare to Duan Yongping's ideal investment?
- What catalysts could unlock value related to this principle?
### 6. Duan Verdict
- Summarize: Does {Company Name} pass the "Concentrate Your Portfolio" test?
- Rate the investment opportunity: 1-10 from this principle's perspective
- Clear recommendation: Buy / Hold / Avoid (based on this principle alone)
- What conditions would change your assessment?
- One-paragraph summary capturing Duan Yongping's likely assessment
## Output Format
Present your analysis with specific data points in each section. Use Duan Yongping's analytical style: business-focused value analysis emphasizing doing the right thing and deep understanding. End with a decisive verdict.Basic Questions
Why does Duan Yongping dare to concentrate large capital in just a few stocks?
Core idea: concentrate investments in few quality companies you truly understand
✅ Using this AI prompt, you can systematically analyze any company or investment opportunity from this principle's perspective.
The prompt guides you to:
1. Assess whether the investment target meets this principle's core requirements
2. Identify key risks and blind spots
3. Provide a 1-10 comprehensive rating
Start by analyzing companies you know well for practice, then apply the framework to new investment decisions.
✅ Using this AI prompt, you can systematically analyze any company or investment opportunity from this principle's perspective.
The prompt guides you to:
1. Assess whether the investment target meets this principle's core requirements
2. Identify key risks and blind spots
3. Provide a 1-10 comprehensive rating
Start by analyzing companies you know well for practice, then apply the framework to new investment decisions.
Usage Tips
Is the AI's 1-10 rating reliable?
⚠️ The rating threshold is much higher under the concentrated portfolio framework.
The rating's value:
- Duan's concentration approach demands extremely high certainty — only scores of 9+ might warrant heavy position consideration
- The score helps with first-round screening, but passing screening is just the beginning, not the conclusion
- Compare scores with your existing holdings to judge if the new company can 'displace' a current position
Key limitations:
- Duan invested in Apple because of deep personal product usage conviction — AI can't provide that conviction
- Concentration requires 'I understand this better than the market' confidence, not just a high AI score
- The rating can't assess your personal depth of understanding — which is the actual prerequisite for concentration in Duan's view
✅ Right approach: A high AI score is necessary but not sufficient. You need to be able to articulate why this company deserves 20%+ of your portfolio.
The rating's value:
- Duan's concentration approach demands extremely high certainty — only scores of 9+ might warrant heavy position consideration
- The score helps with first-round screening, but passing screening is just the beginning, not the conclusion
- Compare scores with your existing holdings to judge if the new company can 'displace' a current position
Key limitations:
- Duan invested in Apple because of deep personal product usage conviction — AI can't provide that conviction
- Concentration requires 'I understand this better than the market' confidence, not just a high AI score
- The rating can't assess your personal depth of understanding — which is the actual prerequisite for concentration in Duan's view
✅ Right approach: A high AI score is necessary but not sufficient. You need to be able to articulate why this company deserves 20%+ of your portfolio.
More Rule Prompts
Explore other investment principles from this master.
Do the Right Things
The most important thing is to do the right thing, then do things right. Many people focus on efficiency while doing the wrong thing. First make sure you're on the right path.
→Understand the Business Moat
Only invest in businesses you truly understand and that have sustainable competitive advantages. If you can't explain the moat in simple terms, you don't understand the business.
→Insist on Margin of Safety
Never pay more than a business is worth. Wait for prices that provide a significant margin of safety. Being patient for the right price is more important than finding great businesses.
→Hold for the Long Term
The ideal holding period is forever. If you've done your homework and bought right, let compounding work. Trading destroys wealth through costs and taxes.
→