Tangible book / share

Tangible book value is shareholders' equity minus goodwill and other intangible assets — the net worth that remains after everything the company cannot separately touch or sell is written down to zero. Divided by shares outstanding it becomes tangible book value per share, the conservative floor beneath the better-known book value figure.

The subtraction targets goodwill first, and for good reason. Goodwill is not a productive asset but an accounting record of past acquisition premiums — the amount paid above the fair value of what was actually acquired. It sits on the balance sheet at cost, is never written up, and falls only when an impairment test forces an admission. Removing it asks a usefully brutal question: what is the equity worth if every deal this management ever did is valued at nothing?

The other intangibles removed are a mixed bag, and the bluntness is deliberate. Purchased patents, licences, spectrum or customer lists can have genuine resale value, so subtracting them can overshoot. Meanwhile the most valuable intangibles a company owns — a brand built over a century, software written by salaried engineers, a distribution network — were never on the balance sheet to begin with, because accounting only capitalises what is bought, not what is built. Tangible book value is therefore not an attempt at precision; it is a floor, constructed by refusing every number that requires trust.

The measure earns its reputation in financial businesses. Tangible book value per share is the standard professional yardstick for banks — bank regulators largely exclude goodwill from capital, and acquisitions in the sector are priced and announced as multiples of tangible book. Insurers are read the same way. Away from finance, the figure is a fast honesty test for serial acquirers: when goodwill and intangibles make up most of reported equity, the book value that headline ratios rest on is mostly a record of prices paid, not assets owned.

What does a good reading look like? A price near or below tangible book value, attached to a business whose earning power is stable, is the classic shape of a margin of safety — the buyer pays for the hard assets and receives the franchise for little or nothing. But the mirror image is common and benign: asset-light companies and long-running repurchasers frequently show negative tangible book value while generating excellent cash returns. A negative figure is a property of the business model or the capital history, not by itself a defect.

The metric misleads in a predictable direction: it punishes exactly the businesses whose moat is intangible. The strongest consumer franchises and data businesses of the last half-century looked perpetually expensive — or meaningless — on tangible book, while remaining superb investments. There is also a subtler artefact: after a large goodwill write-down, price-to-tangible-book is unchanged while plain price-to-book suddenly "improves", though nothing about the business improved. The gap between book value and tangible book value, tracked over time, is often more informative than either number alone — it is the running total of the acquisition story.

Moatkeep computes tangible book value per share as stockholders' equity minus goodwill and other intangible assets, all taken from each company's filed balance sheet, divided by split-adjusted shares outstanding, point-in-time and revised on restatement. It is the denominator of the price-to-tangible-book ratio shown alongside plain price-to-book, and ratios built on a zero or negative figure display as not meaningful rather than as a negative multiple.

For a value investor the number is the sternest of the balance-sheet yardsticks: everything on it can, at least in principle, be counted. When a stern test is passed, the margin of safety is real; when it is failed, the investment case simply rests on the intangibles — which is not a verdict, but a statement of where the risk lives.