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Book Yield: The Inverse of Price-to-Book
The book yield divides the accounting book value of equity per share by the share price, producing the inverse of the price-to-book (P/B) ratio in percentage form. A stock trading at 2 times book has a 50 percent book yield; a stock trading at 0.8 times book has a 125 percent book yield. The metric anchors valuation to the recorded value of net assets and remains a workhorse for banks, insurers, and asset-heavy industrials.
Key Takeaways
- Book yield equals book value per share divided by price, or 1 divided by the P/B ratio.
- High book yield typically signals an asset-heavy firm or a low-return business, not necessarily a bargain.
- The metric struggles when intangibles, goodwill, or buybacks distort reported equity.
- Pair book yield with return on equity to separate cheap value from cheap because-it-should-be-cheap.
Key Takeaways
- Book yield equals book value per share divided by price, or 1 divided by the P/B ratio.
- High book yield typically signals an asset-heavy firm or a low-return business, not necessarily a bargain.
- The metric struggles when intangibles, goodwill, or buybacks distort reported equity.
- Pair book yield with return on equity to separate cheap value from cheap because-it-should-be-cheap.
What It Is
The book yield is a percentage representation of the price-to-book valuation multiple. Book value of equity is total assets minus total liabilities, taken from the balance sheet at historical cost less accumulated depreciation, adjusted for share repurchases that reduce reported equity.
Damodaran's NYU Stern materials place book value multiples in the same family as earnings and revenue multiples but emphasize that book value is an accounting construct rather than a market value. Tangible book yield, which excludes goodwill and other intangibles from the numerator, is the more conservative version preferred for financial firms.
The Intuition
Book value is supposed to be a floor: in a liquidation, claimants are paid up to the value of the firm's net assets. In practice, that floor is soft. Historical cost ignores inflation, depreciation schedules may not match economic wear, and intangibles like brands and software rarely sit on the balance sheet at their economic value.
Still, a 100 percent or higher book yield (P/B at or below 1) attracts attention because it suggests the market is unwilling to assign any premium to going-concern earnings. Damodaran's work shows that low P/B stocks have historically outperformed high P/B stocks, especially in the value-investing tradition of Ben Graham, although recent decades have weakened the pattern.
How It Works
The basic formula is:
Book Yield = Book Value per Share / Price per Share = 1 / (P/B)
Where book value per share is:
Book Value per Share = (Total Equity - Preferred Stock) / Diluted Shares Outstanding
The tangible version excludes goodwill and other intangibles:
Tangible Book Yield = (BV per Share - Intangibles per Share) / Price per Share
Damodaran's framework for relative valuation, drawn from the Gordon growth model, shows that P/B equals (ROE - g) / (r - g) times the payout ratio, which means book yield rises as ROE falls. Two firms with the same book yield can therefore be very different propositions: one earns a high return on equity and is genuinely cheap, the other earns a low return and is correctly cheap.
Stock buybacks reduce book value when shares are repurchased above book. A firm that has been buying back stock aggressively can show a very low or even negative book value while still being a high-quality business, which makes book yield a poor stand-alone metric for buyback-heavy large caps.
Worked Example
Two regional banks both trade at $40 per share. Bank A has book value per share of $50 and ROE of 14 percent. Bank B has book value per share of $50 and ROE of 6 percent.
- Both banks: book yield = 50 / 40 = 125 percent (P/B = 0.8)
On book yield alone the two look identical and both look cheap, since both trade below stated book. The Damodaran framework reveals the difference. Bank A's intrinsic P/B at a 10 percent cost of equity is approximately (14 - 3) / (10 - 3) = 1.57, well above the current 0.8, suggesting genuine undervaluation. Bank B's intrinsic P/B at the same cost of equity is (6 - 3) / (10 - 3) = 0.43, well below 0.8, suggesting Bank B is actually expensive even at this book yield. The same book yield hides opposite signals.
Common Mistakes
- Ignoring ROE. Book yield without ROE is half a story. Use the P/B-ROE matrix to separate cheap-good from cheap-bad.
- Forgetting buybacks. Aggressive buybacks above book can crush reported equity, distorting both book yield and P/B over time.
- Mixing financial and non-financial firms. Banks and insurers carry assets at or near fair value; industrials carry them at historical cost. Book yield comparisons across these groups can be very misleading.
- Treating intangibles uniformly. Internally generated brands rarely appear on the balance sheet; acquired ones do, through goodwill. Two firms with identical brand strength can show very different book yields purely because of acquisition history.
- Assuming liquidation value equals book value. Inventory write-downs, asset impairments, and lease obligations can leave realized liquidation value far below stated book.
Frequently Asked Questions
What is book yield in simple terms? Book yield is the accounting net worth of a company per share, divided by its share price, expressed as a percentage. A 100 percent book yield means the company's recorded equity equals its market price.
How does book yield affect investment decisions? Value investors use a high book yield (low P/B) as a starting screen for potentially cheap stocks, especially banks and insurers. The screen is most useful when paired with ROE: high book yield plus high ROE is the classic value combination.
What is a real-world example of book yield? After the 2008 financial crisis, many US and European bank shares traded at book yields above 200 percent (P/B below 0.5) for years, reflecting market scepticism about the realizable value of loan books.
How can investors use book yield effectively? Combine book yield with ROE, use tangible book for financial firms, and check whether buybacks above book are distorting the numerator. Avoid cross-sector book yield comparisons.
How is book yield different from earnings yield? Earnings yield uses current period profit; book yield uses cumulative net assets. Earnings yield captures profitability; book yield captures asset backing. They can move in opposite directions for the same firm.
Sources
- Damodaran, A. Chapter 19: Book Value Multiples. NYU Stern. https://pages.stern.nyu.edu/~adamodar/pdfiles/valn2ed/ch19.pdf
- Damodaran, A. Price-Book Value Ratio: Definition and Description. NYU Stern. https://pages.stern.nyu.edu/~adamodar/pdfiles/eqnotes/pbv.pdf
- CFA Institute. Market-Based Valuation: Price and Enterprise Value Multiples. https://www.cfainstitute.org/insights/professional-learning/refresher-readings/2026/market-based-valuation-price-enterprise-value-multiples
- Mauboussin, M. and Callahan, D. The Math of Value and Growth. Morgan Stanley Counterpoint Global Insights. https://www.morganstanley.com/im/publication/insights/articles/article_themathofvalueandgrowth.pdf
Disclaimer
This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.