Blog
Value investing insights, stock analysis guides, and methodology deep-dives.
Buffett's $1 Retained Earnings Test Explained
Warren Buffett's $1 retained earnings test reveals whether management is creating or destroying shareholder value. Learn how it works, including the earning power metric that removes market mood bias.
Economic Moat Score: Quantifying Competitive Advantage
Learn how SafetyMargin.io's Economic Moat Score measures a company's competitive advantage durability across four dimensions: ROIC consistency, margin stability, revenue predictability, and reinvestment efficiency.
Buffett Signal: Combining Valuation and Sentiment
The Buffett Signal cross-references DCF margin of safety with market sentiment to identify classic Buffett-style opportunities. Learn how the signal works and what each level means.
Forensic Accounting: 3 Tools to Spot Earnings Fraud
Learn how to use the Beneish M-Score, Altman Z-Score, and Sloan Ratio together to detect earnings manipulation, bankruptcy risk, and low-quality earnings before they hurt your portfolio.
Historical Fundamentals: Reading Multi-Year Trends
Learn how to use 10+ years of historical data to evaluate a company's earnings power, capital efficiency, and financial health over time.
Insider Transactions: Buy Signals vs Noise
Insider buying is one of the strongest bullish signals in investing. Insider selling is more nuanced. Learn how to interpret both and avoid common traps.
Investment Checklist: Disciplined Buy Decisions
An investment checklist forces you to evaluate every stock systematically, avoiding emotional decisions and ensuring nothing important gets missed.
Key Valuation Metrics Every Investor Should Know
Learn how to interpret the 12 key valuation metrics on SafetyMargin.io — from FCF Yield and P/E to ROIC, Gross Margin, and balance sheet safety indicators.
Management Quality: Buffett's Evaluation Framework
Great businesses need great managers. Learn how Warren Buffett evaluates management teams — compensation alignment, capital allocation track records, and the signals that separate owner-operators from empire builders.
Ownership Structure: Reading Skin in the Game
Learn how to read ownership breakdowns like a value investor. High insider ownership, institutional concentration, and position changes reveal who believes in a company — and who is heading for the exit.
Sloan Ratio: Spotting Low-Quality Earnings
The Sloan Ratio measures how much of a company's earnings come from non-cash accruals vs. real cash flow. Learn how to use it to identify earnings that are likely to deteriorate.
Owner Earnings: Buffett's Better Alternative to EPS
Learn what owner earnings are, how Warren Buffett uses them to value businesses, and why they give a more honest picture of profitability than earnings per share.
What Is Margin of Safety and Why Buffett Swears by It
Learn what margin of safety means in value investing, how to calculate it using DCF analysis, and why Warren Buffett considers it the cornerstone of intelligent investing.
DCF Explained: Step-by-Step Guide for Beginners
A beginner-friendly guide to DCF valuation. Learn how to estimate a stock's intrinsic value by projecting future cash flows and discounting them to present value.
What Is ROIC? The Best Business Quality Metric
Return on Invested Capital (ROIC) is the single best metric for assessing business quality and competitive advantage. Learn how it works and what makes a good ROIC.
Free Cash Flow Yield: The Metric Investors Overlook
Free cash flow yield tells you how much cash a business generates relative to its price. Learn why it's a more reliable valuation metric than P/E ratio for value investors.
Beneish M-Score: Detect Earnings Manipulation
The Beneish M-Score detects potential earnings manipulation using 8 financial variables. Learn how to interpret each component and what the overall score means for your investment.
Altman Z-Score: Spotting Bankruptcy Risk Early
The Altman Z-Score predicts financial distress using five accounting ratios. Learn how to interpret the score and use it to avoid value traps.
Reverse DCF: See What the Market Is Pricing In
Reverse DCF flips the valuation model: instead of estimating intrinsic value, it reveals the growth rate the market is currently pricing into a stock.
Mr. Market's Mood: Contrarian Sentiment Guide
Learn how to use market sentiment indicators as a contrarian signal. When everyone is greedy, be fearful — and when everyone is fearful, look for bargains.
Buyback Effectiveness: When Repurchases Create Value
Not all buybacks are created equal. Learn how to evaluate whether a company's share repurchases are creating or destroying shareholder value.
Coca-Cola's Capital Allocation: 10-Year Analysis
A deep dive into how Coca-Cola has allocated capital over the past decade — dividends, buybacks, reinvestment, and what it means for long-term shareholders.
Apple's Buyback Machine — Has It Been Worth It?
Apple has spent over $600 billion on share buybacks. We analyze whether this massive capital allocation decision has created or destroyed shareholder value.
Is Johnson & Johnson a Buffett Business?
We run Johnson & Johnson through a complete Buffett-style analysis — moat assessment, capital allocation, forensic checks, and DCF valuation — to see if it qualifies.
Microsoft's Moat in Numbers: ROIC and Margins
A quantitative analysis of Microsoft's competitive advantage using ROIC, margins, free cash flow, and capital allocation data from SafetyMargin.io.
ROIC vs ROE — Which Matters More for Moat Detection?
ROIC and ROE both measure profitability, but they tell different stories. Learn when each metric matters and why ROIC is the better moat indicator.
Free Cash Flow vs Owner Earnings — What's the Difference?
Free cash flow and owner earnings are both cash-based profitability metrics, but they treat growth investments differently. Learn when to use each one.
P/E Ratio vs FCF Yield: Which Should You Trust?
The P/E ratio is the most popular valuation metric, but FCF yield may be more reliable. Compare the two and learn when each one gives the better signal.
Gross Margin vs Operating Margin Explained
Gross margin and operating margin measure profitability at different levels. Learn what each reveals about competitive advantage and operational efficiency.
Debt/Equity vs Interest Coverage Explained
Debt/Equity measures how much a company borrows. Interest Coverage measures whether it can afford the borrowing. Learn how to use both to assess financial health.