Value investing means buying a share for less than a conservatively estimated value of the underlying business. The work is to explain that estimate, test what could invalidate it, and decide whether the gap is sufficient for the uncertainty involved. A low share price alone does not answer those questions.
This guide connects the investment process to the site's net-net screener, composite rankings, and dividend stock screener. Examples throughout this library use hypothetical companies and inputs.
What is value investing?
Price is observable; business value must be estimated. An investor might investigate a company because its assets appear to exceed its market capitalization, or because durable cash generation seems inexpensive relative to the purchase price. The estimate depends on the business, the claims against it, and the assumptions used.
The approach has roots in Benjamin Graham and David Dodd's work at Columbia. Columbia Business School's history of value investing provides the historical context. Our Benjamin Graham guide covers the principles in more detail.
Price, intrinsic value, and margin of safety
Keep three figures separate: today's market price, a range of estimated values, and the maximum price justified by your research. The last is a decision rule, not a forecast of the next market quotation.
Suppose an illustrative business has 10 million diluted shares. After accounting for debt and other claims, your scenarios imply equity values of $240 million, $300 million, and $360 million. Those are $24, $30, and $36 per share. A $22 quote is below all three estimates, but the pessimistic scenario leaves only a small cushion. If your rule is a 25% discount to the $24 downside estimate, the corresponding research price is $18: 24 x (1 - 0.25). The rule does not prevent losses if the assumptions are wrong.
Read the margin-of-safety guide before treating a discount as a sufficient reason to invest.
Choose the right research branch
| Research question | Start here | Use the tools |
|---|---|---|
| Are realizable assets being overlooked? | Net-net screening workflow | NCAV stocks and net cash |
| What is the balance sheet actually worth? | NCAV, NTAV, and book value | Tangible asset rankings |
| Can earnings support the valuation? | Understanding earning power | 5Y and 5Q earning metrics |
| Is an income-paying business attractively priced? | Dividend value investing | Dividend screener |
| What could destroy the apparent discount? | Net-net risk assessment | Share changes and asset burn |
Value investing versus growth investing
Growth is an input to valuation: retaining earnings can create value if reinvestment produces adequate returns. A growing company can be expensive, reasonably priced, or undervalued. A low-multiple company can also be fairly priced because its economics are deteriorating. Berkshire's 1992 shareholder letter explains why growth and value need to be considered together.
Use the value-versus-growth comparison to compare assumptions rather than decide which label always wins.
A repeatable stock research process
- Write the candidate's apparent discount in one sentence and identify the measure behind it.
- Read the latest annual and interim filings; note report dates, currencies, and diluted share counts.
- Reconcile the assets, earnings, or dividends used in the valuation to those filings.
- Build a downside case with lower earning power, asset recoveries, or distributions.
- Examine debt maturities, cash burn, dilution, governance, and trading liquidity.
- Record what would change the estimate and when you will revisit it.
The SEC's financial-statement introduction explains the statements used in this process. Our microcap filing checklist provides a focused next step.
Common mistakes to investigate
Book value can include assets that cannot be sold for their carrying amounts. Historic profits can include cyclical peaks or nonrecurring gains. A dividend can be funded while the balance sheet weakens. A screen's report dates can also lag the latest filing. Explain each apparent bargain in terms of business economics and current evidence.
Continue with quality filters, liquidity traps, and dividend value traps.
Learn from investors and original research
The value-investor approaches guide compares research questions associated with Graham, Buffett, and Munger. The research resources guide links to original letters, filings, and research communities. Use another investor's thesis as a set of claims to verify against the business, rather than as a substitute for your own valuation.