CANSLIM
CANSLIM is a philosophy of screening, purchasing, and selling common stock. Developed by William O'Neil, the co-founder of Investor's Business Daily, it is described in his highly recommended book How to Make Money in Stocks.
The name may suggest some boring government agency, but this acronym actually stands for a very successful investment strategy. What makes CANSLIM different is its attention to tangibles such as earnings, as well as intangibles, such as overall strength and ideas in the company. The best thing about this strategy is that there's evidence that it works: there are countless examples of companies that, over the last half of the twentieth century, met CANSLIM criteria before increasing enormously in price. In this section we explore each of the seven components of the CANSLIM system.
C = Current Earnings
O'Neil emphasizes the importance of choosing stocks whose earnings per share (EPS) in the most recent quarter have grown in relation to the EPS of last year's same quarter. For example, a company's EPS figures reported in this year's quarter from April to June should have grown relative to the EPS figures for that same three-month period one year ago.
How Much Growth?
The percentage of growth a company's EPS should show is somewhat debatable, but the CANSLIM system suggests no less than 18-20%. O'Neil found that in the period from 1953 to 1993, three-quarters of the 500 top-performing equity securities in the U.S. showed quarterly earnings gains of at least 70% prior to a major price increase. The other one quarter of these securities showed price increases in two quarters after the earnings increases. This suggests that basically all of the high performing stocks showed outstanding quarter-over-quarter growth. Although 18-20% growth is a rule of thumb, the truly spectacular earners usually demonstrate growth of 50% or more.
Earnings Must Be Examined Carefully
The system strongly asserts that investors should know how to recognize low-quality earnings figures--that is, figures that are not accurate representations of company performance. Because companies may attempt to manipulate earnings, the CANSLIM system maintains that investors must dig deep and look past the superficial numbers companies often put forth as earnings figures.
O'Neil says that, once you confirm that a company's earnings are of fairly good quality, it's a good idea to check others in the same industry. Solid earnings growth in the industry confirms the industry is thriving and the company is ready to break out.
A = Annual Earnings
CANSLIM also acknowledges the importance of annual earnings
growth. The system indicates that a company should have shown
good annual growth (annual EPS) in each of the last five years.
How Much Annual Earnings Growth?
It's important that the CANSLIM investor, like the value investor, adopt the mindset that investing is the act of buying a piece of a business, becoming an owner of it. This mindset is the logic behind choosing companies with annual earnings growth within the 25-50% range. As O'Neil puts it, "Who wants to own part of an establishment showing no growth?"
Wal-Mart?
O'Neil points to Wal-Mart as an example of a company whose strong annual growth preceded a large run-up in share price. Between 1977 and 1990, Wal-Mart displayed an average annual earnings growth of 43%. The graph below demonstrates how successful Wal-Mart was after its remarkable annual growth.

A Quick Re-Cap
The first two parts of the CANSLIM system are fairly logical
steps employing quantitative analysis . By identifying a company
that has demonstrated strong earnings both quarterly and annually,
you have a good basis for a solid stock pick. However, the
beauty of the system is that it applies five more criteria
to stocks before they are selected.
N = New
O'Neil's third criterion for a good company is
that it has recently undergone a change, which is often necessary
for a company to become successful. Whether it is a new management
team, a new product, a new market, or a new high in stock
price, O'Neil found that 95% of the companies he studied
had experienced something new.
McDonald's
A perfect example of how newness spawns success can be seen
in McDonald's past. With the introduction of its new
fast food franchises, it grew over 1100% in four years from
1967 to 1971! And this is just one of many compelling examples
of companies that, through doing or acquiring something
new, achieved great things and rewarded their shareholders
along the way.
New Stock Price Highs
O'Neil discusses how it is human nature to steer away
from stocks with new price highs--people often fear that
a company at new highs will have to trade down from this
level. But O'Neil uses compelling historical data
to show that stocks that have just reached new highs often
continue on an upward trend to even higher levels.
S = Supply and Demand
The S in the CANSLIM system stands for supply and demand ,
which refers to the laws that govern all market activities.
The analysis of supply and demand in the
CANSLIM method maintains that, all other things being equal,
it is easier for a smaller firm, with a smaller number of
shares outstanding , to show outstanding gains. The reasoning
behind this is that a large-cap company requires much more
demand than a smaller cap company to demonstrate the same
gains.
O'Neil explores this further and explains
how the lack of liquidity of large institutional investors
restricts them to buying only large-cap, blue-chip companies,
leaving these large investors at a serious disadvantage that
small individual investors can capitalize on. Because of supply
and demand, the large transactions that institutional investors
make can inadvertently affect share price, especially if the
stock's market capitalization is smaller. Because individual
investors invest a relatively small amount, they can get in
or out of a smaller company without pushing share price in
an unfavorable direction.
In his study, O'Neil found that 95%
of the companies displaying the largest gains in share price
had fewer than 25 million shares outstanding when the gains
were realized.
L = Leader or Laggard
In this part of CANSLIM analysis, distinguishing between market
leaders and market laggards is of key importance. In each
industry, there are always those that lead, providing great
gains to shareholders, and those that lag behind, providing
returns that are mediocre at best. The idea is to separate
the contenders from the pretenders.
Relative Price Strength
The relative price strength of a stock can range from 1
to 99, where a rank of 75 means the company, over a given
period of time, has outperformed 75% of the stocks in its
market group. CANSLIM requires a stock to have a relative
price strength of at least 70. However, O'Neil states
that stocks with relative price strength in the 80–90
range are more likely to be the major gainers.
Sympathy and Laggards
Do not let your emotions pick stocks. A company may seem
to have the same product and business model as others in
its industry, but do not invest in that company simply because
it appears cheap or evokes your sympathy. Cheap stocks are
cheap for a reason, usually because they are market laggards.
You may pay more now for a market leader, but it will be
worth it in the end.
I = Institutional Sponsorship
CANSLIM recognizes the importance of companies having some
institutional sponsorship . Basically, this criterion is based
on the idea that if a company has no institutional sponsorship,
all of the thousands of institutional money managers have
passed over the company. CANSLIM suggests that a stock worth
investing in has at least 3-10 institutional owners.
However, be wary if a very large portion
of the company's stock is owned by institutions. CANSLIM
acknowledges that a company can be institutionally over-owned
and, when this happens, it is too late to buy into the company.
If a stock has too much institutional ownership, any kind
of bad news could spark a spiraling sell-off .
O'Neil also explores all the factors
that should be considered when determining whether a company's
institutional ownership is of high quality. Even though institutions
are labeled "smart money," some are a lot smarter than others.
M = Market Direction
The final CANSLIM criterion is market direction. When picking
stocks, it is important to recognize what kind of a market
you are in, whether it is a bear or a bull . Although O'Neil
is not a market timer , he argues that if investors don't
understand market direction, they may end up investing against
the trend and thus compromise gains or even lose significantly.
Daily Prices and Volumes
CANSLIM maintains that the best way to keep track of market conditions is to watch the daily volumes and movements of the markets. This component of CANSLIM may require the use of some technical analysis tools, which are designed to help investors/traders discern trends.
Conclusion
Here's a recap of the seven CANSLIM criteria:
- C = Current quarterly earnings
per share - Earnings must be up at least 18-20%.
- A = Annual earnings per
share – These figures should show meaningful
growth for the last five years.
- N = New things - Buy companies with new products, new management, or significant
new changes in industry conditions. Most importantly, buy
stocks when they start to make new highs in price. Forget
cheap stocks; they are that way for a reason.
- S = Shares outstanding - This should be a small and reasonable number. CANSLIM
investors are not looking for older companies with a large
capitalization.
- L = Leaders - Buy
market leaders, avoid laggards.
- I = Institutional sponsorship - Buy stocks with at least a few institutional
sponsors who have better than average recent performance
records.
- M = General market - The market will determine whether you win or lose, so
learn how to discern the market's overall current direction,
and interpret the general market indexes (price and volume
changes) and action of the individual market leaders.
CANSLIM is great because it provides solid guidelines, keeping subjectivity to a minimum. Best of all, it incorporates tactics from virtually all major investment strategies. Think of it as a combination of value, growth, fundamental, and even a little technical analysis.
Remember, this is only a brief introduction to the CANSLIM strategy; this overview covers only a fraction of the valuable information in O'Neil's book, How to Make Money in Stocks. We recommend you read the book to fully understand the underlying concepts of CANSLIM.

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