Complete Guide to CANSLIM Stock Selection Method 2026

1. Introduction to CANSLIM Stock Selection Method

CANSLIM It is a systematic stock selection method proposed by legendary American investor William J. O'Neil in his classic book How to Make Money in Stocks. O'Neil summarized this stock selection system containing seven key dimensions by studying the common characteristics of all super bull stocks in the US stock market since the 1880 era.

CANSLIM is not a vague investment philosophy, but a set ofquantifiable, executable, and verifiablesystem. Each letter corresponds to a clear stock selection criterion, allowing investors to objectively screen and evaluate stocks.

"The whole secret to winning in the stock market is to lose the least amount possible when you're not right."

Core Criteria:Current quarterly earnings per share (EPS) year-over-year growth of at least 25%, the higher the better.

O'Neil's research found that before super bull stocks launched their major rallies, the median of their current quarterly earnings growth rates reached 70%. This is one of the most important stock selection criteria.

• Focus on earnings growth rate, rather than absolute earnings amount
• Earnings growth must accelerate (this quarter > last quarter > year-ago quarter)
• Exclude one-time gains (non-recurring items such as asset sales)
• Quarterly sales growth also needs to be ≥ 25%

Core Criteria:Compound annual growth rate (CAGR) of earnings per share over the past three years of at least 25%。

This ensures the stock has a stable long-term growth record, rather than just a short-term explosion.

• Earnings per share should have grown every year over the past three years
• Return on equity (ROE) should be ≥ 17%
• Cash flow should be ample; do not only look at book profits

Core Concept:Stocks need a catalyst to drive a major advance.

• New products/services:Revolutionary new products often give rise to super-performing stocks (such as the iPhone and ChatGPT)
• New management:An outstanding new CEO can turn a company's fortunes around
• New price highs:O'Neil noted that most people are afraid to buy stocks making new highs, yet super-performing stocks are precisely those that keep making new highs

Core Concept:Stock prices are determined by supply and demand. Volume is the best indicator of the supply-demand relationship.

• Pay attention to the number of shares outstanding (smaller-cap stocks have greater explosive potential)
• Volume should expand by ≥ 50% on a breakout (confirming buying power)
• Watch insider buying/selling and company share buybacks
• Excessive stock splits or share issuance can dilute value

Core Criteria:Buy only industry leaders,RPS ≥ 80. This is the core value of RPS Stock。

O'Neil repeatedly emphasized:

• Never buy laggard stocks just because they look cheap
• In a bull market, leading stocks outperform laggards by a wide margin
• 用 RPS (Relative Price Strength) objectively measures who the leaders are
• Buy stocks with the highest RPS, not the ones you 'feel' will go up

Core Criteria:At least some high-quality institutional investors should hold the stock, and institutional ownership should be increasing.

• Monitor whether the number of funds holding the stock is increasing (quarterly reports)
• High-quality institutions (Fidelity, T.Rowe Price, etc.) carry more weight than average institutions
• Excessive concentration of institutional holdings actually poses risk (in the event of a coordinated sell-off)

Core Concept:Even the best stocks have a 75% chance of declining when the overall market is falling. Determining market direction is a prerequisite for all investment decisions.

• Monitor the daily trends of major indices (Hang Seng Index, S&P 500, Nasdaq)
• Watch for a market Follow-Through Day — a confirmation signal of a bottom reversal
• Reduce position size or stay on the sidelines during a market downtrend

9. Complete Stock Selection Process (Practical Operation)

Step 1: Confirm market direction (M)

Observe whether the Hang Seng Index / S&P 500 is in an uptrend. If the market is declining, pause all operations.

Step 2: RPS screening (L) ← the core of RPS Stock

In RPS Stock, set RPS120 ≥ 80 to screen a list of strong stocks.

Step 3: Fundamental screening (C + A)

Apply earnings growth filters to the strong-stock list: quarterly EPS growth ≥ 25%, annual EPS growth ≥ 25%.

Step 4: Look for a catalyst (N)

Check for new products, new businesses, or prices approaching or making new highs.

Step 5: Analyze supply and demand (S)

Check whether volume expands on breakouts and whether institutions are increasing holdings (I).

Step 6: Formulate a trading plan

Set the buy point (typically a breakout or a pullback to the 50-day moving average), stop-loss level (-7% to -8%), and target price.