Price-to-Book (P/B)
ValuationHow much the market is charging you relative to the company's net asset value on paper. Essential for banks, largely irrelevant for software.
The Price-to-Book ratio compares market capitalisation to shareholders' equity (book value) on a per-share basis. It measures the premium investors pay above the accounting net asset value of the business. A P/B of 1.0× implies the market values the company exactly at its balance sheet worth — meaning no premium for earnings power, brand, or future growth. P/B is the dominant valuation metric for financial institutions (banks, insurers) because their assets — loans, bonds, and securities — are marked to market or fair value, making book value a reasonable economic proxy. For asset-light businesses, P/B becomes nearly meaningless: a software company's most valuable assets (code, brand, talent) are largely absent from the balance sheet, producing an artificially low book value and a stratospheric P/B.
Share Price is the current market price. Book Value Per Share is shareholders' equity (total assets minus total liabilities) divided by shares outstanding. The ratio tells you how many dollars the market pays for every $1 of net accounting assets.
Trading below net asset value. Classic deep-value territory — but verify asset quality. For banks, sub-1× P/B often signals credit concerns. For industrials, it may reflect asset impairment risk.
Modest premium to assets. Typical of mature, capital-intensive businesses with moderate ROE. Market assigns limited premium for earnings power beyond asset liquidation value.
Significant intangible value driving the premium. Justified for high-ROE compounders with durable moats. Dangerous for asset-heavy businesses — means the market assumes assets will generate sustained above-average returns.
P/B anchors valuation for the entire financial sector. Bank analysts live by this metric — a bank trading below 1× P/B is often signalling credit quality concerns or profitability problems, while one trading at 2× suggests strong return on equity and clean asset quality. P/B below 1 has historically been a value screen in deep-value investing. It also complements ROE analysis: a company with high ROE deserves a high P/B, and the relationship between the two (via the Gordon Growth Model) gives a theoretical fair P/B for any business.
P/B below 1 is not automatically a buy signal. A company can trade below book because the market correctly believes the assets are impaired — overvalued loans, obsolete inventory, or goodwill from failed acquisitions all sit on the balance sheet at inflated values until they're written down. The 'margin of safety' in a low P/B only exists if the asset values are real. This is why forensic accounting and loan book analysis matter so much in bank investing — the reported book value is only as good as the asset quality behind it.