Benjamin Graham’s net-net method (also called the NCAV or net current asset value strategy) is one of the strictest deep-value approaches ever formalized. It buys stocks trading below a conservative estimate of liquidation value based solely on current assets, treating fixed assets, brands and future earnings as worth zero.
Graham developed and practiced it during and after the Great Depression, when many companies traded at extreme discounts. He described it in Security Analysis (1934) and later works. It is sometimes called “cigar-butt” investing because it targets discarded, struggling companies that still have enough liquid assets to offer a margin of safety.
The Core Formula
The basic calculation is :
NCAV = Current Assets − Total Liabilities
− Preferred Stock
(and often Minority Interest)
NCAV per share = NCAV ÷ Shares Outstanding
Graham typically required the stock price to be no more than two-thirds of NCAV per share. This added an extra layer of safety against the possibility that receivables or inventory would realize less than book value in a forced liquidation.
A more conservative variant (sometimes called Net-Net Working Capital or NNWC) applies haircuts :
- Cash and short-term investments at full value
- Accounts receivable at ~75%
- Inventory at ~50%
- Then subtract all liabilities and preferred stock
The idea is simple : if the market capitalizes the entire company for less than the net value of its most liquid assets after paying every creditor, the fixed assets and any going-concern value come free (or the market is offering a free option on them).
Graham’s Rationale and Rules
Graham viewed this as the ultimate margin of safety. Even in a worst-case liquidation, common shareholders should theoretically receive more than they paid. He emphasized :
- Diversification — typically a portfolio of 20–30 such stocks rather than concentrated bets, because individual net-nets often face real distress.
- Positive recent earnings in many of his descriptions (eliminate those with net losses in the trailing 12 months) to reduce the chance of rapid asset deterioration.
- Buying a diversified group when many such opportunities exist (he used the abundance of net-nets as a market-level indicator of undervaluation).
Graham reported that diversified portfolios of these stocks returned roughly 20% annually over multi-decade periods in his own experience at Graham-Newman.
Historical Performance
Academic studies have repeatedly documented strong excess returns :
- Henry Oppenheimer (1986) studied U.S. stocks trading at ≤ two-thirds of NCAV from 1970–1983. Equal-weighted portfolios held for one year returned about 29.4% annually versus roughly 11.5% for the market benchmark.
- Later extensions (e.g., Carlisle, Mohanty, and Oxman covering into the 2000s) found continued outperformance, with some periods showing 20%+ annual excess returns.
- International studies (UK, Japan, global samples) have often shown positive results as well, though magnitudes vary by market and era.
- Returns tend to cluster after market crashes or periods of extreme pessimism, when net-nets become more plentiful and then recover.
Warren Buffett has noted that net-nets were among the most profitable strategies he used early in his career (when managing smaller sums), though the opportunity set shrank as markets became more efficient and capital under management grew.
How the Method Works in Practice
- Screen for companies where market capitalization (or price per share) is below NCAV (ideally well below the two-thirds threshold).
- Verify the balance-sheet numbers carefully — current assets, total liabilities (not just current liabilities), preferred stock, and share count. Accounting differences and off-balance-sheet items matter.
- Apply qualitative filters : recent profitability if following Graham’s stricter guidance, absence of obvious fraud or irreversible decline, and reasonable liquidity.
- Build a diversified basket and rebalance periodically (historically often annually).
- Accept that many individual holdings will be mediocre or fail, the edge comes from the average across the portfolio when the discount is deep enough.
Modern Status and Challenges
True net-nets are much rarer in large, efficient markets like the U.S. today than they were in the 1930s–1970s. They appear more frequently after sharp market declines, in smaller stocks, or in certain international markets (studies have shown stronger residual edges in places such as Japan, Taiwan, or Canada in some periods).
Key risks and limitations :
- Value traps — Companies can keep losing money and erode their current assets.
- Liquidity and transaction costs — Many net-nets are micro-cap or thinly traded.
- Bankruptcy and distress — The method buys companies the market views as potentially terminal.
- Accounting quality — Overstated receivables or inventory can make NCAV illusory.
- Opportunity cost — In prolonged bull markets the strategy may underperform or have long dry periods with few candidates.
Modern practitioners often adapt the pure net-net screen with additional quality or catalyst filters or they look internationally. Some quantitative investors treat it as one extreme end of a broader deep-value continuum.
Summary
Graham’s net-net method is a pure liquidation-value strategy designed for environments of extreme market pessimism. It prioritizes a hard, balance-sheet-based margin of safety over growth prospects or qualitative narratives. Historical evidence shows it has generated substantial excess returns when applied systematically and with diversification, particularly after severe downturns. In today’s markets it is harder to implement at scale in the largest exchanges, but the underlying logic — buying assets for less than their conservative liquidation value — remains a foundational idea in deep-value investing.
This is an exploration of a historical method and its documented results, not investment advice. Implementing it requires careful analysis of individual securities, awareness of risks and suitability for one’s own capital and risk tolerance.