Deep Value Investing: How Benjamin Graham's Strategy Still Works Today
Benjamin Graham's fundamental insight was simple and devastating to conventional thinking: markets frequently price securities at levels that have almost no connection to what the underlying business is actually worth. In his decades on Wall Street -- teaching at Columbia, managing the Graham-Newman partnership, and writing the foundational texts of security analysis -- Graham repeatedly found companies selling for less than the cash and liquid assets on their balance sheets, even after accounting for every dollar of debt they owed.
He called the gap between price and intrinsic value the "margin of safety." And in deep value investing, that gap is not a modest 10-20% discount. It is a chasm -- buying $1 of assets for 50 cents, or sometimes less.
This article explains what deep value investing means, how Graham's original strategies work, the key differences between deep value and conventional value investing, why deep value remains highly relevant in Asian markets today, and the practical screens you can apply in ValueMarkers to find these extreme opportunities.
This article is for educational purposes only and does not constitute financial advice.
What Is Deep Value? How It Differs From Regular Value Investing
Conventional value investing is broad: buying securities that are cheap relative to earnings, cash flow, or book value, with the expectation that the market will eventually recognize the discount and reprice upward. A stock trading at 12x earnings in a sector where peers trade at 18x might be a value investment. The discount is real but modest.
Deep value investing occupies a different extreme. Deep value stocks are not just cheap -- they are radically cheap, often trading below the value of their most liquid assets alone. These are companies so out of favor, so ignored, so apparently impaired that the market has priced in a scenario approaching liquidation or permanent decline -- even when neither is actually happening.
The deep value investor's job is to find situations where the market's pessimism dramatically exceeds the actual fundamental risk. This is not about finding good businesses at fair prices. It is often about finding mediocre or distressed businesses at prices that are too low even accounting for their mediocrity.
Warren Buffett, who studied under Graham and worked at his firm, called early-career deep value investing "cigar-butt investing" -- picking up discarded cigars from the street because even a beaten-up cigar has one last free puff in it. You buy a bad business at a low enough price, extract whatever value remains, and move on. Buffett later evolved toward higher-quality businesses at fair prices (the Munger influence), but acknowledged that pure Grahamian deep value -- applied systematically to a diversified basket of statistically cheap stocks -- produces strong long-run returns.
Benjamin Graham's NCAV Strategy
Graham's most extreme screen is the NCAV approach -- Net Current Asset Value. The formula:
NCAV = Current Assets - Total Liabilities
If a company's market capitalization is below its NCAV, Graham considered it a potentially compelling investment. You are buying the business for less than the liquidation value of its current assets alone (cash, receivables, inventory), even before assigning any value to its fixed assets (property, equipment, long-term investments).
The logic is pure arbitrage of pessimism: if you bought all shares in the open market, fired management, and simply liquidated the current assets and paid off all debts, you would receive more than you paid. The fixed assets would be pure bonus.
Graham's NCAV criteria in practice:
- Market cap < NCAV (ideally market cap < 2/3 of NCAV for a larger margin of safety)
- Company is not in imminent bankruptcy (enough cash to survive near term)
- Insider ownership or other alignment factor present
- Diversification across at least 20-30 such positions (individual selection matters less than the ensemble)
In Graham's era (1930s-1950s), NCAV opportunities were plentiful because markets were thin, information was scarce, and institutional neglect left obvious mispricings untouched. In modern U.S. and European markets, genuine NCAV opportunities are rare and often reflect real problems (regulatory action, product obsolescence, management fraud risk). The academic evidence, however, confirms that NCAV portfolios have historically outperformed market indices substantially, even when the strategy is applied mechanically without judgment.
Where NCAV still works: Japan, South Korea, and smaller European markets. Cross-holding structures, family control, domestic-focused institutional investors, and cultural norms around dividend distribution mean that many companies in these markets trade at persistent discounts to liquidation value. Graham would have found more NCAV candidates on the Tokyo Stock Exchange on a random Tuesday in 2025 than across all of the S&P 500 combined.
The Cigar-Butt Approach in Practice
The cigar-butt approach -- buying cheap, extracting one last puff, selling -- requires accepting that you are often dealing with inferior businesses. This is psychologically difficult for investors trained to seek quality. The deep value investor must suppress the instinct toward quality and focus mechanically on price.
The practical implementation:
- Screen broadly for statistical cheapness -- P/B below 0.7, P/E below 10, EV/EBIT below 6
- Apply a financial health filter (see Piotroski below) to eliminate companies that are cheap because they are truly headed toward distress
- Diversify across 20-30 positions -- no single position should be more than 5% of the portfolio, because individual deep value stocks fail at a meaningful rate
- Set a holding period with a catalyst -- deep value investments need a reason to re-rate. Common catalysts: management change, activist investor, industry consolidation, buyout at a premium, or simply time passing and earnings improving
The critical mistake in cigar-butt investing is holding too long. A cigar already yielding its last puff should be dropped when the one-puff thesis has played out. Deep value investors who hold past the catalyst are often left holding a deteriorating business that was never going to compound into a long-term compounder.
The Margin of Safety: Foundation of Deep Value
Every value investing strategy borrows from Graham's margin of safety concept, but deep value defines it most literally. The margin of safety is the difference between the price you pay and your best estimate of intrinsic value. In deep value, this difference must be large -- 30, 40, or 50% below estimated worth -- precisely because deep value companies tend to be lower quality businesses where the intrinsic value estimate itself carries more uncertainty.
Graham's reasoning: if you are analyzing a company with clear moats, predictable earnings, and talented management, you might accept a 15% discount to fair value because your estimate of fair value is relatively confident. But if you are analyzing a manufacturing company with erratic earnings, cyclical demand, and questionable accounting, your intrinsic value estimate could be off by 30% in either direction. To protect against your own analytical errors, you need to buy at a price 40-50% below even your conservative estimate of worth.
This is why deep value strategies tend to work as portfolios rather than as individual stock picks. The margin of safety on each position hedges against individual errors, and when applied across dozens of similarly cheap names, the statistical advantage of buying extreme cheapness asserts itself over time even though individual positions fail regularly.
The P/B + Piotroski Screen
Modern practitioners have combined deep value screening (low P/B ratio) with financial strength filtering (Piotroski F-Score) to improve the signal quality of NCAV-era strategies.
Step 1: P/B < 0.7 A price-to-book ratio below 0.7 means you are paying 70 cents for each dollar of the company's net asset value. For perspective, the S&P 500 historically trades at 3-4x book value. A stock at 0.7x book is deeply out of favor.
Step 2: Piotroski F-Score >= 6 Joseph Piotroski's 9-point scoring system evaluates three dimensions:
Profitability (4 factors): Return on assets > 0, cash flow from operations > 0, change in ROA (positive), accrual (cash flow > net income)
Leverage & Liquidity (3 factors): Lower long-term debt ratio than prior year, higher current ratio than prior year, no share dilution in the past year
Operating Efficiency (2 factors): Higher gross margin than prior year, higher asset turnover than prior year
A score of 6 or above identifies companies that, while cheaply valued, are showing signs of operational improvement rather than continuing deterioration. The combination of low P/B (statistical cheapness) and high Piotroski (improving fundamentals) is one of the most academically validated screens in the literature.
Step 3: Positive Free Cash Flow Confirm that the company generates positive operating cash flow. This eliminates businesses that are cheap because they are genuinely burning through cash, which can destroy the asset base that makes the low P/B meaningful.
Why Deep Value Works in Japan and Korea Today
The Tokyo Stock Exchange's decades-long push to address low P/B stocks -- particularly its 2023 directive urging companies below 1x P/B to outline improvement plans -- has drawn attention to Japan as perhaps the most fertile global market for deep value investors.
Many Japanese companies carry cash and investment securities equal to or exceeding their market capitalization, trade at P/B ratios of 0.4-0.7x, and have Piotroski scores of 6-8. The deep value screen described above would generate hundreds of candidates in Japan that would be near-impossible to find in the U.S. market.
South Korea faces similar structural factors: family-controlled conglomerates (chaebols), cross-shareholding structures, and historically low dividend payouts have created a "Korea discount" where many companies trade well below book value. Regulatory pressure to improve corporate governance and increase shareholder returns has begun narrowing these discounts -- which is exactly the catalyst deep value investors need.
For individual investors, the practical path is either direct ADR/international ETF exposure to these markets or using internationally-capable screeners to identify specific names.
Why Deep Value Requires Patience
Deep value is the strategy most often abandoned prematurely, precisely because the positions look wrong at the moment of maximum opportunity. When a stock trades at 0.5x book and every analyst consensus says it should, the news flow is uniformly negative, the management is mediocre, and your friends think you are delusional for owning it.
The academic evidence on deep value re-rating cycles shows that the average time from purchase to material re-rating is 2-3 years. Strategies that require selling after 12 months -- because the portfolio looks bad in year-end reviews or because the investor loses conviction -- systematically miss the payoff period.
Graham's own record at Graham-Newman was built on patience with positions that frequently looked terrible for 12-18 months before the catalyst arrived. His investment in GEICO, which he bought heavily in 1948 when it was small and unknown, compounded for decades -- far beyond the typical deep value holding period -- because he recognized it eventually crossed from deep value into genuine quality compounder territory.
How to Find Deep Value Stocks in ValueMarkers
ValueMarkers provides the screening tools needed to implement a systematic deep value strategy:
Screen 1: Statistical Cheapness
- P/B ratio < 0.7
- EV/EBIT < 7
- P/E (trailing) < 12 (if the company is profitable)
Screen 2: Financial Health
- Piotroski F-Score >= 6
- Current ratio > 1.0 (short-term assets exceed short-term liabilities)
- Debt-to-equity < 1.5x
Screen 3: Cash Flow Reality
- Positive operating cash flow (last 12 months)
- FCF positive or near breakeven (FCF/Assets > -2%)
Sort: By P/B ascending to surface the most statistically extreme discounts first.
Once you have a list of candidates, use ValueMarkers' balance sheet analysis to verify NCAV manually: current assets minus total liabilities compared to current market cap. Any stock where this calculation is positive -- where market cap is below liquidation value of net current assets -- deserves deeper investigation.
Deep value is not exciting. The companies are often dull, mismanaged, or in secular decline. The thesis is rarely "this is a great business." It is "the price is so wrong that even a mediocre outcome is profitable from here." Applied systematically and patiently, it is one of the most consistently profitable systematic strategies in the historical record.
ValueMarkers is a research tool. Nothing in this article constitutes investment advice or a recommendation to buy or sell any security. Always conduct your own due diligence and consult a qualified financial advisor before making investment decisions.