1.

“Cut every loss without hesitation when it is 7% or 8% below your purchase price.”

Meaning:
Risk management is more important than being right.

2.

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

Meaning:
Small losses are manageable; large losses destroy portfolios.

3.

“You buy stocks when they’re nearer to their highs for the year, not when they have sunk lower and look cheap.”

Meaning:
Strong stocks often become stronger.

4.

“All the big winners I’ve known have had one thing in common: huge earnings growth.”

Meaning:
Earnings growth drives major stock moves.

5.

“The market is human nature and crowd psychology on daily display.”

Meaning:
Emotions strongly influence price movement.

6.

“A stock’s price and volume action tell you whether it is under accumulation or distribution.”

Meaning:
Institutional buying and selling leave clues in charts.

7.

“Most people buy the wrong stocks at the wrong time.”

Meaning:
Timing and stock selection both matter.

8.

“To make big money, you must study and understand past market winners.”

Meaning:
Historical patterns repeat in markets.

9.

“The best stocks show improving fundamentals before major price moves.”

Meaning:
Price often follows earnings acceleration.

10.

“Avoid cheap stocks. Buy quality leaders.”

Meaning:
Market leaders outperform weak low-priced stocks over time.

Who Was William O'Neil?

William O'Neil was:

• growth investor

• stock trader

• founder of Investor's Business Daily

• creator of the famous:

CAN SLIM investing system.

O'Neil’s Core Investing Philosophy

Buy Fast-Growing Market Leaders Breaking Out of Strong Bases

He combined:

• fundamentals

• technical analysis

• earnings growth

• market psychology.

CAN SLIM System

This became one of the most famous growth-investing systems ever.

Meaning of CAN SLIM

Simplified CAN SLIM Formula

\text{Winning Stock} = \text{Strong Earnings} + \text{Market Leadership} + \text{Institutional Buying} + \text{Positive Trend}

O'Neil vs Buffett

O'Neil’s Investing Style

O'Neil’s Biggest Contribution

Combining Fundamentals + Technicals

Before O'Neil:
many investors used:

• only charts
  or

• only fundamentals.

He combined both.

O'Neil’s Most Important Lesson

Cut Losses Quickly

His famous:

7–8% stop-loss rule

prevents:

• catastrophic drawdowns

• emotional averaging-down

• portfolio destruction.

O'Neil on Multibaggers

He studied:

• historical market winners

and found common traits:
✅ explosive earnings
✅ innovative products
✅ industry leadership
✅ institutional accumulation
✅ strong price momentum

O'Neil’s View on Cheap Stocks

Unlike Graham-style investors,
O'Neil disliked:

• weak “cheap-looking” stocks.

He preferred:

expensive-looking strong leaders.

O'Neil’s Connection to Your Stock Screen

Your screen partly overlaps with O'Neil thinking because you already focus on:

✅ profit growth
✅ sales growth
✅ ROE
✅ strong fundamentals
✅ market quality

But your screen is:

more value-oriented

while O'Neil is:

growth + momentum oriented.

O'Neil’s Ideal Stock

He prefers:
✅ fast earnings growth
✅ sector leadership
✅ innovative business
✅ strong charts
✅ institutional buying
✅ momentum confirmation

O'Neil’s Most Powerful Principle

“Big winning stocks often look expensive before becoming much more expensive.”

This is very different from:

• Graham

• Klarman

• Burry style investing.

O'Neil on Market Direction

One of his strongest beliefs:

Even great stocks struggle in weak markets.

So he heavily emphasized:

overall market trend.

O'Neil’s Core Formula

\text{Exceptional Stock} = \text{Explosive Earnings Growth} + \text{Leadership} + \text{Strong Price Trend}

William O'Neil’s Core Philosophy in One Line

Buy fundamentally strong market leaders showing explosive growth and strong technical momentum while cutting losses quickly.