This is a comprehensive guide to Graham stock screening using Serenity. To just get a quick run-through, or for the most up-to-date glossary of terms, please see the Quick Reference.
Benjamin Graham — once known as The Dean of Wall Street — was a scholar and financial analyst who mentored legendary investors such as Warren Buffett, William J. Ruane, Irving Kahn and Walter J. Schloss.
Warren Buffett describes Graham's book — The Intelligent Investor — as "by far the best book about investing ever written" (in its preface).
In this tutorial, we'll look at how Graham's investment framework can be applied — as faithfully as possible — to today's stock markets using modern technology.
Quantitative Measures - EPS and BVPS
The first numbers to look at when evaluating a stock are its Earnings Per Share (EPS) and Book Value Per Share (BVPS). They tell us how much we're getting for our money.
Earnings Per Share
EPS tells us how much profit the company makes per share.
EPS combined with price gives us a rough idea of the rate of return we can expect on our investment. EPS and Price are usually mentioned together as the P/E ratio, or Price-to-Earnings ratio.
Book Value Per Share
BVPS is the theoretical liquidation value of the stock. That is, if the company were to close tomorrow, BVPS tells us how much we would be paid per share after all the company's assets are sold at their depreciated prices, and all liabilities are paid.
However, most companies also include Goodwill and other Intangibles — which have no resale value — in their balance sheets. It's important to use only tangible assets when calculating liquidation values.
Qualitative Categories - Defensive, Enterprising and NCAV
When buying something, we also need to look at how good it is, and not just how much we're getting.
Graham recommended three different measurable categories of stocks, with different quantitative (EPS and BVPS) and qualitative (Growth and Stability) requirements for each category. Just as with buying anything else, higher quality stocks are costlier; i.e., we pay more for them per dollar of EPS and BVPS.
First Category - Defensive
The safest (but costliest) category of stocks recommended by Graham were for Defensive investors. The criteria that Graham specified for identifying them are as follows:
1. Not less than $100 million of annual sales.
[This works out to $500 million today based on the difference in CPI/Inflation from 1973]
2-A. Current assets should be at least twice current liabilities.
2-B. Long-term debt should not exceed the net current assets.
3. Some earnings for the common stock in each of the past 10 years.
4. Uninterrupted [dividend] payments for at least the past 20 years.
5. A minimum increase of at least one-third in per-share earnings in the past 10 years.
6. Current price should not be more than 15 times average earnings of the past three years.
7. Current price should not be more than 1½ times the book value.
As a rule of thumb, we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5.
Graham's recommended price for Defensive grade stocks can be calculated from criteria #6 and #7. This price is popularly known as the Graham Number.
Note: Graham Numbers on Serenity are calculated using the average EPS of the past three years, as Graham required.
The Graham Number is designed to quantitatively assess any stock, regardless of sector or industry. For example, public utility companies that are typically low on Earnings will need higher asset figures to be acceptable. Similarly, service sector companies that are typically low on assets will need higher Earnings figures to be acceptable.
Graham recommended a minimum portfolio size of 10 for Defensive grade stocks; or in other words, not more than 10% of one's portfolio per Defensive grade stock.
Assessment Results on Serenity
If the stock meets the qualitative criteria (#1 to #5) for Defensive investment above:
Graham Grade = Defensive
Intrinsic Value = Defensive Price (Graham Number)
Second Category - Enterprising
For Enterprising investors who are looking for greater profits — and are willing to put in more effort into the maintenance of their portfolio — Graham then recommended the following criteria for identifying Enterprising grade stocks:
[For issues selling at P/E multipliers under 10]
1-A. Current assets at least 1½ times current liabilities.
1-B. Debt not more than 110% of net current assets.
2. Earnings stability: No deficit in the last five years covered in the Stock Guide.
3. Dividend record: Some current dividend.
4. Earnings growth: Last year's earnings more than those of 1966.
[Corresponds to the earnings of 5 years ago]
5. Price: Less than 120% net tangible assets.
Thus, the price limit for a stock meeting Enterprising quality requirements is the lower of 120% net tangible assets, or 10 times Trailing EPS. We can combine the two — as Graham did for the Defensive Price — to yield a quantitative price calculation similar to the Graham Number. We'll call this the Serenity Number.
As with the Graham Number, the Serenity Number too applies to any stock — regardless of sector or industry — because it's a combination of both Assets and Earnings. A lower value in one will have to be compensated for by a higher value in the other.
Serenity's recommendation is for a minimum portfolio size of 20 for Enterprising grade stocks; or in other words, not more than 5% of one's portfolio per Enterprising grade stock.
Assessment Results on Serenity
If the stock meets the qualitative criteria (#1 to #4) for Enterprising investment above:
Graham Grade = Enterprising
Intrinsic Value = Enterprising Price (Serenity Number)
Third Category - NCAV (Net Current Asset Value or Net-Net)
These stocks are also known as Net-Nets or cigar-butt stocks today. Graham did recommend these stocks for Enterprising investors, but with additional qualitative checks and diversification requirements.
Bargain Issues, or Net-Current-Asset Stocks
the results of buying 30 issues at a price less than their net-current-asset value
It always seemed, and still seems, ridiculously simple to say that if one can acquire a diversified group of common stocks at a price less than the applicable net current assets alone—after deducting all prior claims, and counting as zero the fixed and other assets— the results should be quite satisfactory.
If we eliminated those which had reported net losses in the last 12-month period we would be still left with enough issues to make up a diversified list.
These criteria give us stocks selling for less than their cash worth alone, and with positive earnings in the last year.
The positive EPS requirement is the qualitative check for NCAV stocks; and is very important. There's not much point buying a stock for its current assets (cash equivalents) alone, if the company's losing money.
Since NCAV stocks undergo the least qualitative tests of all of Graham's categories, they also require the most diversification. Graham recommended a portfolio size of 30 for NCAV stocks; or in other words, not more than 3.3% of one's portfolio per NCAV stock.
Assessment Results on Serenity
If the stock has a positive EPS and a positive Net Current Asset Value:
Graham Grade = NCAV (Net-Net)
Intrinsic Value = NCAV Price (Net Current Asset Value)
Finding Graham Stocks Today - Classic Graham Screening
Today's data mining software makes it relatively easy to find stocks that clear even such elaborate criteria.
Serenity's algorithms apply the above 17-point framework to 5000+ U.S. stocks. The free Classic Graham Screener lists all stocks meeting up to 70% of Graham's quantitative criteria. Shown below is a list of such stocks that meet all of Graham's qualitative Defensive criteria.
Similar searches can also be done for Graham's Enterprising and NCAV (Net-Net) criteria.
We can thus build a 70% compliant Graham stock portfolio today, using the free Classic Graham Screener alone.
The Classic Graham Screener can also be used to screen stocks by their Graham Numbers.
For example, shown below is the list of stocks selling at a fifth of their Graham Numbers, or less:
Note: The sliders on numerical filters can be adjusted with the mouse, or with the keyboard arrow keys. Filter values can also be typed in.
Finding Graham Stocks Today - Advanced Graham Screening
The Advanced Graham Screener allows us to:
- Fine-tune Graham's rules with more customizable filter combinations.
- View and compare more data per stock, and more stocks per page.
- View stocks with Intrinsic Value(%) values exceeding 70%, and stocks analyzed by other users.
So the very first application of the Advanced Graham Screener would be to get a list of Defensive, Enterprising and NCAV stocks with Intrinsic Value(%) results of 70% or more. Simply screen with the following filters:
Intrinsic Value(%) > 70%
Graham Grade Defensive, Enterprising or NCAV
Source (Analyzed by) Serenity
The Advanced Graham Screener can also be used to compare all Graham Ratings — and other data — for any set of stocks of your choice, as shown below.
Note: The Quick Reference section on Graham Ratings may help in understanding this section of the tutorial better.
Latest Defensive Stocks
The following links will open Serenity's Graham stock screeners preloaded with stocks that clear Graham's rules for Defensive Industrials today. At today's bond yields, completely Defensive and Enterprising grade Graham stocks require Intrinsic Values of 70% or higher.
The following link will open the Advanced screener preloaded with stocks that clear Graham's rules for Defensive Financials today.
Latest Enterprising Stocks
The following links will open the screeners preloaded with stocks that clear Graham's rules for Enterprising investors today.
Latest NCAV Stocks
The following links will open the screeners preloaded with stocks that clear Graham's NCAV rules today.
Other Advanced Screening Strategies
1. See how to screen for stocks exceeding Graham's requirements, such as two-thirds NCAV (Net-Net).
2. The Advanced Graham Screener also allows for some highly Customized Stock Screening Strategies.
Other Graham Strategies
Blue Chips / Index Funds
Graham taught that the easiest strategy — for any investor who did not have the time for stock research and portfolio maintenance — was to proportionally invest in Blue Chips, or stocks that comprise one of the Indices. This is something that can be done a lot more easily today, by investing in an Index Fund.
In the first he acquires a true cross-section sample of the leading issues, which will include both some favored growth companies, whose shares sell at especially high multipliers, and also less popular and less expensive enterprises. This could be done, most simply perhaps, by buying the same amounts of all thirty of the issues in the Dow-Jones Industrial Average (DJIA).
So it should be safe to say that Graham's first recommended strategy today would be to invest in a good Index Fund that follows a reputed index such as the DJIA or the S&P 500.
Note: This strategy includes expensive growth stocks (as described above), and is an especially clear refutation of the myth that Graham's framework was restricted to cheap stocks and cigar-butts; a misconception created by misinterpretations of Graham's NCAV (Net-Net) strategy.
Special Situations or "Workouts"
Graham wrote that, in theory, Special Situations was a part of the program of operations of an Enterprising investor. But he classified them as a business altogether different from regular investing.
As the name indicates, these are special strategies that follow no specific rules or calculations. Some of the operations Graham classified under this category are:
- Acquisitions of smaller firms by larger ones.
- Arbitrage operations.
- The breakup of public-utility holding companies pursuant to legislation, and
- Issues that are involved in any sort of complicated legal proceedings and with prices beaten down to unduly low levels due to the ensuing prejudice.
Being able to identify and take advantage of a Special Situation requires extensive experience with Graham's other strategies. Graham himself wrote:
The exploitation of special situations is a technical branch of investment which requires a somewhat unusual mentality and equipment. Probably only a small percentage of our enterprising investors are likely to engage in it
And elsewhere, he noted about Workout or Arbitrage opportunities:
This has become more than ever a field for professionals, with the requisite experience and judgment...
Special Situations are therefore not amenable to large-scale automated analysis such as Serenity's, and need to be studied on a case by case basis. But any investment of this kind would still need to be within a Margin of Safety, and meet Graham's definition of an investment operation:
An investment operation is one which, upon thorough analysis, promises safety of principal and an adequate return. Operations not meeting these requirements are speculative.
To Conclude - The Margin of Safety
In The Intelligent Investor, Graham says "to distill the secret of sound investment into three words, we venture the motto - Margin of Safety". While the popular interpretation of the margin today is to buy stocks with low P/E and P/B ratios, a true Graham Margin of Safety is both qualitative and quantitative as described above.
Graham taught that, over the long run, an investor's returns depend on the amount of intelligent effort he is willing to bring to his investments; and that increased risk — contrary to popular belief — actually reduces returns.
Warren Buffett once gave a speech at Columbia Business School explaining how Graham's record of creating exceptional investors (such as Buffett himself) is unquestionable, and how Graham's principles are everlasting. The speech is now known as The Superinvestors of Graham-and-Doddsville.
Buffett concluded the speech saying:
"Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace, and those who read their Graham & Dodd will continue to prosper."
Appendix I - The Benjamin Graham Formula
Benjamin Graham gave several warnings with the below formula, and only used it to demonstrate that growth rate projections were almost never reliable.
V = EPS x (8.5 + 2g), or
Intrinsic Value = Current (Normal) Earnings x (8.5 plus twice the expected annual growth rate)
But due to an omission in recent editions of The Intelligent Investor, this formula is often used to evaluate stocks today instead of Graham's actual (and more thorough) methods.
Understanding The Benjamin Graham Formula Correctly has more details.
Appendix II - Graham's Notes on Selling
Graham is said to have made a reference to "sell at 50-100% gains or after 2-3 years" in one of his interviews. But the interview is not verifiable in print, and claims to be from an indirect source.
Serenity recommends following Graham's printed material.
Given below are Graham's notes on selling, from his books and printed lectures:
"buy wisely when prices fall sharply and to sell wisely when they advance a great deal. At other times he will do better if he forgets about the stock market and pays attention to his dividend returns and to the operating results of his companies."
"even defensive portfolios should be changed from time to time, especially if the securities purchased have an apparently excessive advance and can be replaced by issues much more reasonably priced"
"the only principle of timing that has ever worked well consistently is to buy common stocks at such times as they are cheap by analysis, and to sell them at such times as they are dear, or at least no longer cheap, by analysis."
And here is an important addendum:
"The intelligent investor must carefully evaluate the costs of trading and taxes before attempting to take advantage of any price discrepancy—and should never count on being able to sell for the exact price currently quoted in the market."
There are numerous such references and the underlying principle in all of them is consistent. The investor is to run the numbers for his portfolio occasionally — once a year or so — and readjust the portfolio as required. Stocks that no longer clear the Graham framework — either due to price appreciation or value deterioration — are to be sold. They may be replaced with new stocks that clear the Graham framework.
"Presumably our defensive investor should obtain—at least once a year—the same kind of advice regarding changes in his portfolio as he sought when his funds were first committed... Incidentally, if his list has been competently selected in the first instance, there should be no need for frequent or numerous changes."
If the Graham figures had been run rigorously earlier, replacement due to value deterioration should be unlikely. Graham's Margin of Safety requirements are very thorough. That's why it's so difficult to find stocks that meet them in the first place.
Appendix III - General Graham Principles
Given below is a summarized list of general Do's and Don'ts based on Graham's writings and The Intelligent Investor.
|Graham Do’s||Graham Don’ts|
|Always invest with a quantifiable Margin of Safety.||Don't speculate. Avoid risky investments.|
|Invest in Index funds if you don’t have the time for stock research.||Most actively managed funds don't keep up with the Indices.|
|Maintain a 25%-75% distribution between stocks & bonds.||Never have a complete stock, or a complete bond, portfolio.|
|Invest for the long term, for periods of at least a year or more.||Don't try to get rich quick, from frequent trading or from tips.|
|Apply intelligent effort. Spend time and energy on research.||Minimize trading activity and expenses. Ignore trends and forecasts.|
|Grow your savings and plan for dividend income.||Don't try to earn an income from frequent trading.|
|Use discount brokers, who work on low fixed rates and high volumes.||Full service brokers charge in percentages and encourage speculation.|
|Manage your own money, with a strategy suited to your situation.||Letting others manage your money may involve Moral Hazard.|
|Pricing - plan on entering and exiting positions at the right price.||Not timing - Never enter at the wrong price, intending to exit at the right time.|
|Buy stocks like groceries - look for good quality, and value for money.||Not like perfume - fashionable names are expensive, and unprofitable.|
|Be logical, patient and courageous. If your research is thorough, you will be proven right.||Don't be emotional. Don’t sell on panic or buy on greed. Ignore the market and its fluctuations.|
|Be an independent thinker. Success depends on correct data and reasoning, not consensus.||Don't follow the herd. Successful strategies and stocks are also usually unpopular.|
|Have a focussed strategy. Use adequate diversification to mitigate risk.||Don't compromise on quality of research with excessive diversification.|
|Keep it simple. Use basic arithmetic well.||Don't be influenced, or intimidated, by financial jargon.|
Since stock markets are considered unpredictable and since financial professionals work with your money, they can take risks with it, lose it, and still get paid. This ability to take risks with no downside is called Moral Hazard.
Graham introduced the famous analogy of a Mr. Market who came to the investor every day with a different price. Sometimes the prices were reasonable. Most of the time, they weren't. Buffett simplified it further by describing Mr. Market as “manic-depressive".