Intrinsic Value: What a Company Is Really Worth
Intrinsic value is the true worth of a company based on its ability to generate cash flow, independent of its current market price. Benjamin Graham defined it as "the value which is justified by the facts." When a stock trades below intrinsic value with a margin of safety, it is a buy.
Intrinsic value is the central concept in value investing. Benjamin Graham, the father of value investing, taught that the stock market is a voting machine in the short term but a weighing machine in the long term — prices fluctuate based on emotions day to day, but over years, price converges to intrinsic value. The value investor's job is to estimate intrinsic value as accurately as possible and buy when the market offers a significant discount (the "margin of safety").
There are several approaches to calculating intrinsic value. The DCF method projects future cash flows and discounts them back to the present. The asset-based method calculates the liquidation value of the company's assets minus liabilities. The earnings power value capitalizes normalized earnings at an appropriate multiple. The Graham number (sqrt(22.5 x EPS x Book Value per Share)) provides a rough estimate of maximum fair value. Each method has strengths and weaknesses, and the best analysts use multiple methods to triangulate on a reasonable range.
Real-world example: In 2020, Berkshire Hathaway's stock traded at $190 per share (Class B). Its intrinsic value, calculated by summing the market value of its stock portfolio ($250B), the estimated value of its wholly-owned businesses ($150B BNSF railroad, $40B GEICO, $30B utilities, $20B manufacturing), and subtracting corporate expenses and taxes, gave an intrinsic value of approximately $300 to $350 per share. The stock was trading at a 35% to 45% discount to intrinsic value. By 2024, Berkshire reached $420 — the market price converged toward intrinsic value as the market recognized the company's true worth.
Margin of Safety
The margin of safety is the difference between a stock's market price and its estimated intrinsic value. If intrinsic value is $100 and the stock trades at $70, there is a 30% margin of safety. Graham insisted on a minimum 30% to 50% margin of safety for investment. The margin of safety protects you from being wrong about your intrinsic value estimate (which is always imprecise) and provides a cushion if the company's prospects deteriorate. A stock trading at or above intrinsic value offers no margin of safety and should not be purchased by a disciplined value investor. The margin of safety is the single most important concept in value investing — it is what makes investing "safe" despite the inherent uncertainty of predicting the future.
FAQs
What is Graham's formula for intrinsic value?
Benjamin Graham proposed a formula: Intrinsic Value = EPS x (8.5 + 2g) x 4.4 / Y, where EPS is trailing 12-month earnings per share, g is the expected annual earnings growth rate (as a percentage), 8.5 is the P/E multiple for a no-growth company, 4.4 was the AAA bond yield in Graham's era, and Y is the current AAA bond yield. The formula was intended as a rough estimate, not a precise calculation. For a company with $5 EPS, 10% growth, and a 5% AAA yield: Value = $5 x (8.5 + 20) x 4.4 / 5 = $5 x 28.5 x 0.88 = $125. The formula is outdated but still used as a quick sanity check.
Can intrinsic value be negative?
Yes — a company with more liabilities than assets and no earnings power has a negative intrinsic value. These companies are candidates for bankruptcy or restructuring. However, a stock cannot trade below zero, so the market price will be near zero (a "penny stock") even if intrinsic value is negative. Negative intrinsic value companies are not investments — they are speculations on a turnaround or restructuring. Most value investors avoid companies with negative tangible book value unless there is a clear path to profitability.
How often does market price equal intrinsic value?
Almost never. The market price is influenced by daily emotions, news, and flows. Intrinsic value changes slowly as the company's fundamentals evolve. Most of the time, the market price bounces around intrinsic value, sometimes above (overvalued), sometimes below (undervalued). The value investor waits for significant deviations — when the market price is well below intrinsic value (a deep value opportunity) or well above (a sell signal). The frequency of these opportunities depends on market conditions: bear markets create many undervalued opportunities; bull markets create many overvalued situations. Patience is essential — sometimes the best action is to wait for the right opportunity.