Book Value
The net assets of a company as recorded by accounting conventions — a figure Buffett uses as a rough, conservative proxy for intrinsic value, while cautioning it can diverge significantly from true economic worth.
“Book value is an accounting term that measures the capital, including retained earnings, that has been put into a business. Intrinsic value is a present-value estimate of the cash that can be taken out of a business during its remaining life.”
“Over time, the aggregate gains in Berkshire's intrinsic value will, we hope, equal or exceed the gains in its book value. But in any given year, the two can move in wildly different directions.”
Concept Analysis
Definition & Origins
Book value is the accounting net worth of a business — assets minus liabilities as recorded on the balance sheet. For most of Berkshire's history, Buffett used per-share book value growth versus the S&P 500's total return as the annual scorecard in the chairman's letter. He discontinued this practice in 2019, stating that book value had become too misleading a proxy for Berkshire's intrinsic value — because the gap had grown too wide on the upside.
Core Ideas
Book value vs. intrinsic value diverge for different business types. For capital-intensive businesses (steel mills, utilities), book value and intrinsic value are often similar — the primary assets are physical and accurately valued. For consumer franchise businesses (Coca-Cola, See's Candies), intrinsic value vastly exceeds book value because the primary assets (brand, consumer loyalty) don't appear on balance sheets.
Berkshire-specific divergence. By 2019, three factors made book value increasingly unreliable: (1) GAAP requires carrying Berkshire's wholly-owned businesses at cost, not market value, dramatically understating their value; (2) the insurance float creates investable capital invisible in book value; (3) ongoing share buybacks below intrinsic value further widened the gap.
The replacement standard. Berkshire now uses a combination of operating earnings, intrinsic value estimates, and share repurchase thresholds as proxies for progress. The transition reflects intellectual honesty: when an established metric stops reflecting economic reality, change the metric.
Practical Application
From 1965 to 2018, Berkshire's per-share book value grew at a 18.7% CAGR vs. the S&P 500's 9.7% — the most cited statistic in the annual letters. This comparison served dual purposes: measuring Berkshire's economic performance and demonstrating the compounding power of Buffett's capital allocation over 53 years. The eventual abandonment of the metric was a testament to the metric's original purpose: it was a proxy for intrinsic value growth, and once it stopped being a good proxy, it was retired.
Common Misconceptions
Misconception 1: High book value means valuable business. Airlines, steel companies, and many retailers have large book values from physical asset accumulation. Their intrinsic values are often below book value because they cannot earn adequate returns on those assets.
Misconception 2: Low price-to-book means cheap. For businesses whose intrinsic value substantially exceeds book value (strong brands, network businesses), a price-to-book of 3x or 4x may still represent a bargain. Using P/B mechanically misses the businesses whose most valuable assets are invisible to accounting.
Thought Evolution
Related Concepts
Case Companies
The scorecard: 18.7% CAGR in book value 1965-2018 vs. 9.7% S&P, then retirement of the metric in 2019
Book value ~$8M vs. intrinsic value $25M+ at acquisition: the consumer franchise gap
Near-zero book value relative to intrinsic value at acquisition: brand and market position are the asset