A stock at 0.8 times book seems to offer $1 of net assets for 80 cents. The missing words are "as recorded in the accounts."
The bargain depends on what those assets can earn and whether their recorded values will hold up.
Copperfield Bank, a fictional regional lender, has a $27 share price at the end of fiscal year 3 (FY3). It trades above book value, yet that alone does not make it expensive. Its accounts give us two book values for the same share.
Book is an accounting measure
Where price-to-sales uses a year's revenue, a book multiple starts with the balance sheet: assets, liabilities and the shareholders' equity left after subtracting liabilities. To get common equity, remove any preferred shareholders' claim from that equity first.
Book value per common share is common equity divided by common shares outstanding at the balance-sheet date. Use the actual count on that date, rather than the weighted-average diluted count used for diluted EPS.
Here, "worth" means recorded net assets. Book value is neither the business's intrinsic value nor a promised payment if it closes.
The price-to-book ratio, or P/B, compares the share price with that recorded amount.
Copperfield reports $2,238.75 million of common equity, 100 million shares and no preferred stock at FY3 year-end. The arithmetic is $2,238.75 million ÷ 100 million = about $22.39 per share.
At $27, its P/B is $27 ÷ $22.39 = 1.21. You pay $1.21 for each $1 of recorded common equity.
Read Copperfield's two book values
Tangible common book value subtracts goodwill and other relevant intangible assets from common equity. Copperfield carries $200 million of these assets; its convention removes the full amount.
That leaves $2,238.75 million − $200 million = $2,038.75 million. Divide by the same 100 million shares to get $20.39 per share. Its price-to-tangible-book ratio is $27 ÷ $20.39 = 1.32. You changed the accounting measure, not the bank's price.
Totals are USD millions at FY3 year-end; per-share figures are dollars. The common-book total is reported; other entries are calculated and rounded.
| Measure | Total | Per share | Multiple |
|---|---|---|---|
| Common book | 2,238.75 | $22.39 | 1.21 |
| Tangible book | 2,038.75 | $20.39 | 1.32 |
Both book values sit below the $27 price. Removing intangibles widens the gap by $2 per share.
The whole-company calculation agrees: $27 × 100 million shares = $2,700 million of market cap. Divide that by $2,238.75 million of common equity and you get the same 1.21 P/B.
One times book is not a bargain line
Copperfield's FY3 return on equity, or ROE, is 11.11%. It measures profit relative to owners' accounting capital. That is the bank's return on book equity, not your return from buying its shares.
A dollar of capital that earns too little can be worth less than a dollar to investors. What matters is sustainable ROE relative to investors' required return, the reward they demand for taking the risk.
Say investors require 10% a year for Copperfield's risk. Sustaining its 11.11% ROE can support a premium to book. With a 13% hurdle, that same earning power falls short and can justify a discount. Neither a premium nor a discount proves a mispricing.
A discount can also reflect expected asset losses. The denominator itself can shrink.
Where the comparison fits
P/B is useful for banks and insurers because equity capital supports their business and absorbs losses. Still, two banks with the same book value can own very different loans. Compare assets, risks, profitability and accounting before treating them as peers.
Use the same book-value definition for both banks. Comparing one bank's P/B with another's price-to-tangible-book mixes two different measures.
At Tessel, our fictional software business, spending to develop software and win customers can go through expenses. The value those efforts create need not appear as matching assets on the balance sheet. A high P/B can reflect what the accounts leave out.
Use StockPolly's screener to gather names, then keep companies in the same industry for your comparison. Inspect their balance sheets and profitability before judging the P/B gap. A screen finds a number; the next job is explaining it.
When book value loses its bearings
Share buybacks reduce recorded equity. Repurchases above book value per share can shrink book value per remaining share and lift P/B without a stronger business. A rising multiple does not always mean investors became more enthusiastic.
Tiny common equity makes P/B unstable; negative equity makes it unsuitable for ranking bargains. At zero equity, the ratio cannot be calculated.
Subtracting goodwill does nothing to make a troubled loan repayable. Copperfield already deducts a loan-loss allowance, an estimate of losses, from its loans. If that estimate is too small, additional loss charges can erode common equity. Tangible book alone cannot establish whether the bank can meet its obligations.
The notes behind those estimates deserve attention; the accounting red flags lesson shows other reasons to question reported balances.
For Copperfield, P/B is a useful way to start comparing banks. Its 1.21 multiple and 11.11% ROE do not establish a bargain: you still need evidence that the loss allowance is adequate and the earning power can last.
Return to Harbor next. Enterprise value broadens its price tag beyond shareholders to include lenders, a useful step for businesses outside banking.
In short
- P/B is the price you pay for each dollar of recorded common equity.
- Tangible book removes accounting intangibles and produces a different multiple.
- Read a bank's book multiple alongside earning power and asset quality.
- Below one times book is a question about the business, not a promise of cash you could collect.