What it means
The seven letters stand for Current quarterly earnings, Annual earnings growth, New products or new management or a new price high, Supply and demand in the shares, Leader rather than laggard, Institutional sponsorship, and Market direction. The method asks an investor to score a candidate against all seven tests instead of falling in love with one attractive number.
It matters in business conversations because it is one of the most widely quoted growth investing frameworks, so you will hear it referenced on trading desks and in investment clubs. For a founder or a manager it also works as a mirror, because it describes exactly what one large group of investors looks for before backing a listed company.
In practice the first two tests are numeric and strict. They look for sharp growth in earnings per share (the profit attached to one share) in the latest quarter against the same quarter a year earlier, plus several consecutive years of rising annual profit.
The remaining tests are about behaviour rather than accounts. They favour shares with limited supply, clear market leadership, growing ownership by professional funds and a rising overall market, which is why a strict follower of the method sits out when the broad market is falling.
The important nuance is that CANSLIM is deliberately a momentum and growth method, so it ignores bargain hunting entirely. A sound but slow business with flat profits will fail the screen even if its shares look cheap, and that is by design rather than an oversight.
In practice
Real-world examples.
Example
A retail investor runs a weekly screen on a stock exchange database and keeps only companies with quarterly earnings growth above 25% and annual growth above 20%. Out of 1,800 listed companies, 41 survive the two earnings tests, and she then reviews each one by hand for market leadership and fund ownership.
Example
A corporate development team at a medical devices group is preparing for an investor day. They map their own numbers against the CANSLIM tests, discover that profit growth is strong but institutional ownership is thin, and build the roadshow around meetings with mid-sized funds.
Example
A wealth adviser uses the M test as a risk control for a client portfolio of growth shares. When the main index falls below its long-run average and stays there, the adviser moves new contributions into cash instead of buying more shares, in line with the market direction rule.
Formula
Calculation
The numeric core of the C test is quarterly earnings growth: Quarterly Earnings Growth = (Current Quarter Earnings Per Share - Same Quarter Last Year Earnings Per Share) / Same Quarter Last Year Earnings Per Share x 100. Suppose a listed manufacturer reports earnings per share of $0.90 for its latest quarter against $0.50 for the same quarter a year earlier. The growth is ($0.90 - $0.50) / $0.50, which is $0.40 / $0.50 = 0.80, or 80%. A screen that demands at least 25% quarterly growth passes this company on the C test, and the investor then checks the A test, which might require annual earnings per share to have risen for at least three straight years, for example from $1.20 to $1.70 to $2.40.Case study
Seen in the real world.
This illustrative example features Northwind Tooling, a fictional listed maker of precision cutting tools. Northwind reports quarterly earnings per share of $0.84 against $0.42 a year earlier, annual earnings per share rising from $1.10 to $1.60 to $2.30, and a new line of automated tool changers that has just won its first large contract.
A fictional growth fund analyst scores Northwind against all seven tests. Current and annual earnings pass easily, the new product test passes, the share count is modest and insider holdings are high, and the shares are the strongest performers in their industry group. The weak point is institutional sponsorship, because only four small funds hold the stock.
The analyst treats the thin fund ownership as an opportunity rather than a failure and takes a starter position, planning to add if two or three larger funds appear in the next ownership filings. Six months later, in this illustrative story, three funds have built positions and the analyst doubles the holding. The point of the story is the sequence: the numbers opened the door, but the full checklist decided the size of the bet.
Watch out
Common mistakes.
- Treating CANSLIM as a valuation method and expecting it to say what a company is worth, when every test is about growth and price behaviour rather than fair value.
- Applying only the earnings letters and skipping the market direction test, which removes the main loss control the method contains.
- Reading the L test as "buy the biggest company in the industry", when it actually means buy the strongest performing share in the industry group, which is often a smaller challenger.
Questions
People also ask.
Does CANSLIM work for private companies?
Not directly, because four of the seven tests rely on share prices, trading volume and fund ownership, although the two earnings tests make a reasonable growth health check for any business.
How often should the checklist be rerun?
Most users rerun the earnings tests each quarter when results are published and review the price and market tests weekly, because those move far faster than the accounts.
Is CANSLIM the same as momentum investing?
It overlaps heavily but is stricter, because pure momentum buys what is rising while CANSLIM also demands proven profit growth behind the price move.
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