Calculate the margin of safety as the percentage discount between estimated intrinsic value and current market price for value investing analysis.
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Value Investing
The margin of safety is the percentage discount between a stock's estimated intrinsic value and its current market price. It represents the cushion that protects investors against errors in valuation, unexpected events, or market downturns.
Benjamin Graham introduced the margin of safety as the central concept of value investing. The idea is simple: buy a stock only when it trades significantly below your estimate of its true worth. The gap between intrinsic value and market price is your safety buffer.
A wider margin of safety compensates for the inherent uncertainty in any intrinsic value estimate. Even the best analysis can be wrong, so paying a discounted price reduces the downside risk.
Subtract market price from intrinsic value and express as a percentage of intrinsic value.
Margin of Safety = (Intrinsic Value − Market Price) / Intrinsic Value × 100
Positive = undervalued (stock trades below IV). Negative = overvalued (stock trades above IV).
You estimate a stock's intrinsic value at 75. It currently trades at 50. MoS = (75 − 50) / 75 × 100 = 33.3%. A one-third discount to your estimated fair value.
Only as reliable as the intrinsic value estimate. If your valuation is wrong, the margin of safety may be illusory. Does not account for qualitative factors like management quality or competitive position.
Frequently asked questions
Graham recommended at least 33%. Many value investors target 25–50%. The appropriate margin depends on the quality and certainty of your valuation estimate.
Similar concept but different context. Margin of safety compares market price to estimated intrinsic value (which may differ from NAV). Discount to NAV compares market price to net asset value per share.
Yes — when the stock trades above estimated intrinsic value. A negative margin means there is no safety cushion and the stock may be overvalued.
Common methods include discounted cash flow (DCF), earnings-based models, the Graham Number, and comparable company analysis. Each method produces a different estimate; the margin of safety accounts for this uncertainty.
Related
These related calculators come from the same leaf category, nearby sibling categories, or the same top-level topic.
Estimate a stock's intrinsic value by projecting earnings growth, applying a terminal P/E multiple, and discounting back to present value.
Calculate Benjamin Graham's maximum fair price from EPS and book value per share using the classic defensive investor formula.
Calculate the price-to-book ratio from market price and book value per share to assess whether a stock trades above or below its equity value.
Calculate trailing or forward price-to-earnings ratio from share price and positive EPS, with the matching earnings yield.
