Margin of Safety — Smart Financial Analysis
Graham's three most important words in investing. Calculate margin of safety for value investing and break-even analysis.
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Margin of Safety = (Intrinsic Value - Market Price) / Intrinsic Value × 100%. Investing: MOS% = (Intrinsic Value - Market Price) / Intrinsic Value × 100. Value investors buy stocks trading below intrinsic value. Benjamin Graham required at least 33% margin of safety before buying.
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Why: Margin of Safety = (Intrinsic Value - Market Price) / Intrinsic Value × 100%. Benjamin Graham coined the concept in The Intelligent Investor (1949). Warren Buffett calls it the ...
How: Enter Intrinsic Value ($), Market Price ($), Current Sales ($) to get instant results. Try the preset examples to see how different scenarios affect the outcome, then adjust to match your situation.
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📋 Quick Examples — Click to Load
📊 Margin of Safety by Sector
Typical MOS ranges by industry
📈 Price vs Intrinsic Value Gap
35% MOS target — price at 65% of value
🍩 MOS Percentage Distribution
Where stocks fall on the MOS spectrum
📊 Graham vs Buffett MOS Thresholds
Minimum MOS requirements by approach
For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.
💡 Money Facts
Margin of Safety analysis is used by millions of people worldwide to make better financial decisions.
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Margin of Safety = (Intrinsic Value - Market Price) / Intrinsic Value × 100%. Benjamin Graham coined the concept in The Intelligent Investor (1949) — Warren Buffett calls it the three most important words in investing. Graham required 33%+ MOS before buying. Buffett typically wants 25-50%. In break-even analysis: MOS = (Current Sales - Break-Even Sales) / Current Sales × 100%. Higher MOS = more protection against errors in valuation or unexpected downturns. A company with 30% MOS in break-even can survive a 30% revenue decline before losing money.
Sources: Benjamin Graham - The Intelligent Investor, CFA Institute, Morningstar, Aswath Damodaran NYU.
Key Takeaways
- • MOS = (Value - Price) / Value — the discount you get when buying below intrinsic value
- • Graham required 33%+ MOS; Buffett typically 25-50%
- • Break-even MOS = (Sales - Break-Even) / Sales — cushion before losses
- • Negative MOS = overvalued — avoid or consider shorting
Did You Know?
How Does Margin of Safety Work?
Value Investing
MOS = (Intrinsic Value - Market Price) / Intrinsic Value. If you pay $65 for a $100 stock, MOS = 35%. You get 35 cents of cushion per dollar — if your valuation is 35% too high, you still break even.
Break-Even Analysis
MOS = (Current Sales - Break-Even Sales) / Current Sales. $500K sales, $350K break-even → MOS = 30%. Revenue can fall 30% before the company loses money.
Risk Adjustment
Graham and Buffett use MOS to absorb valuation errors. DCF models are imprecise — a 33% MOS means your intrinsic value can be 33% wrong and you still avoid permanent loss.
Expert Tips
MOS Thresholds Comparison
| Investor | Min MOS | Rationale |
|---|---|---|
| Graham | 33% | Buy at 2/3 of value or less |
| Buffett | 25-50% | Higher for uncertain businesses |
| Break-Even | 20-30% | Cushion before losses |
Frequently Asked Questions
What is margin of safety?
Margin of Safety = (Intrinsic Value - Market Price) / Intrinsic Value × 100%. Benjamin Graham coined the concept in The Intelligent Investor (1949). Warren Buffett calls it the three most important words in investing. It measures the cushion between what you pay and what a business is worth — higher MOS means more protection against valuation errors.
What is the margin of safety formula?
Investing: MOS% = (Intrinsic Value - Market Price) / Intrinsic Value × 100. Break-even: MOS% = (Current Sales - Break-Even Sales) / Current Sales × 100. Example: Intrinsic $100, price $65 → MOS = 35%. Graham required 33%+ MOS before buying.
What is margin of safety in value investing?
Value investors buy stocks trading below intrinsic value. MOS is the discount — a 35% MOS means you pay 65 cents for every dollar of value. Buffett typically wants 25-50% MOS. It protects against errors in DCF estimates, industry downturns, and management mistakes.
What is Graham's margin of safety?
Benjamin Graham required at least 33% margin of safety before buying. He advised buying when price ≤ 2/3 of intrinsic value. For a $50 stock worth $50, buy below $33.33. This rule limits downside if your valuation is wrong.
What is margin of safety percentage?
MOS percentage = (Value - Price) / Value × 100. A 30% MOS means you can absorb a 30% overestimate of value and still break even. In break-even analysis, 30% MOS means revenue can drop 30% before losses. Negative MOS = overvalued — avoid or short.
What is margin of safety in break-even analysis?
MOS = (Current Sales - Break-Even Sales) / Current Sales × 100. It measures how far sales can fall before losses. $500K sales, $350K break-even → MOS = $150K or 30%. A company with 30% MOS can survive a 30% revenue decline before losing money.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator is for educational purposes only. Intrinsic value estimates are subjective; DCF models have significant error. Margin of safety does not guarantee profit or prevent loss. Not financial advice. Consult a qualified advisor for investment decisions.
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