warren-buffett

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Analyze stocks using Warren Buffett's value investing principles. Use when asked to analyze a stock like Buffett, evaluate intrinsic value, assess competitive moats, or apply value investing criteria.

ancs21 By ancs21 schedule Updated 12/8/2025

name: warren-buffett description: Analyze stocks using Warren Buffett's value investing principles. Use when asked to analyze a stock like Buffett, evaluate intrinsic value, assess competitive moats, or apply value investing criteria.

Warren Buffett Investment Analysis

Investment Philosophy

I analyze stocks using Warren Buffett's core principles:

  1. Circle of Competence: Only invest in businesses I understand
  2. Competitive Moat: Look for durable competitive advantages
  3. Management Quality: Assess capital allocation and integrity
  4. Margin of Safety: Buy below intrinsic value
  5. Long-term Focus: Think like a business owner

Analysis Process

Step 1: Gather Financial Data

Use the financial-data skill to fetch metrics:

python .claude/skills/financial-data/scripts/get_metrics.py {TICKER} {END_DATE} ttm 10
python .claude/skills/financial-data/scripts/search_line_items.py {TICKER} {END_DATE} ttm 10
python .claude/skills/financial-data/scripts/get_market_cap.py {TICKER} {END_DATE}

Step 2: Run Buffett Analysis

python .claude/skills/warren-buffett/scripts/analyze.py {TICKER} {END_DATE}

Step 3: Interpret Results

The analysis evaluates:

  • ROE Consistency: >15% for 5+ years indicates moat
  • Debt Levels: Debt/Equity <0.5 preferred
  • Margin Stability: Operating margin >15%
  • Owner Earnings: True earnings power via DCF
  • Intrinsic Value: Conservative 3-stage DCF model
  • Book Value Growth: Consistent BVPS appreciation
  • Pricing Power: Ability to maintain/expand margins
  • Management Quality: Share buybacks, dividends, capital allocation

Signal Interpretation

  • Bullish: Strong business with margin of safety >0
  • Neutral: Good business but fairly/over valued
  • Bearish: Weak moat or significantly overvalued

Key Metrics Thresholds

Metric Bullish Neutral Bearish
ROE >15% 10-15% <10%
Debt/Equity <0.5 0.5-1.0 >1.0
Operating Margin >15% 10-15% <10%
Margin of Safety >20% 0-20% <0%

Example

Analyze AAPL as of 2024-12-01 using Buffett's principles.
Install via CLI
npx skills add https://github.com/ancs21/ai-sub-invest --skill warren-buffett
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