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William J. O’Neil


William J. O’Neil is not a financial term, but a person’s name. He is a renowned American entrepreneur, stockbroker and writer, best known for his growth investing strategy and for founding the business newspaper Investor’s Business Daily. His investment strategies are widely followed in the financial industry.


The phonetic pronunciation of “William J. O’Neil” would be “Wil-yuhm Jay O-neel”.

Key Takeaways

  1. William J. O’Neil is a renowned entrepreneur and stockbroker, best-known as the founder of the financial publishing organization, Investor’s Business Daily. His pioneering work in the field of stock data research has greatly impacted the investment industry.
  2. He is the author of the investment guide “How to Make Money in Stocks” , which is considered a definitive resource for understanding and applying his CAN SLIM investment strategy. CAN SLIM is an acronym for the seven quantitative and technical characteristics that winning stocks have before making huge price increases.
  3. O’Neil’s theories and methodologies, including Cup-with-Handle and Relative Strength strategies, have provided investors with practical techniques to make better investment decisions and understand the stock market in more depth, making him a highly influential figure in the finance world.


William J. O’Neil is a significant figure in the world of business and finance as he is an American entrepreneur, stockbroker, author, and financial analyst, known primarily for being the founder of the investment firm, William O’Neil & Co. Inc. He also developed the CAN SLIM investment strategy, a popular and highly-regarded method that uses a combination of quantitative and qualitative criteria to identify potential investment opportunities. Moreover, O’Neil founded Investor’s Business Daily, a national newspaper devoted to the coverage of economic, business, and financial news, which is noted for its detailed coverage of stock markets. His successes as a stockbroker and contributions to stock market analysis have made O’Neil an influential figure in the finance industry.


William J. O’Neil is a renowned American entrepreneur, investor, and finance author who has had a significant impact on stock investing strategies throughout the globe. He is best-known for his unique investing methodology known as the CANSLIM strategy, a growth investing system, which he developed to streamline the process of identifying potential growth stocks. This strategy incorporates a blend of both technical and fundamental analysis intending to highlight companies before they exhibit significant price advances.O’Neil’s CANSLIM strategy acts as a guiding tool for investors, helping them navigate their investment decisions. Each letter of the acronym represents a key factor to observe in a company that could indicate future dramatic growth. For example, ‘C’ stands for current quarterly earnings per share, ‘A’ for annual earnings increases, ‘N’ for new products or management. The remaining letters include ‘S’ for supply and demand, ‘L’ for leader or laggard, ‘I’ for institutional sponsorship, and finally ‘M’ stands for market direction. As an investing technique, CANSLIM is primarily used for evaluating and buying shares of companies that display robust growth potential.


1. William J. O’Neil & Co. Inc.: This is a leading financial services company that O’Neil himself founded, which provides clients with data-driven market research, including a variety of investor tools, and offers personal and professional financial advice. Typically, it helps companies make better decisions via buying and selling strategies based on their market research.2. Investor’s Business Daily (IBD): O’Neil also created the Investor’s Business Daily newspaper, which uses the methodology he developed to analyze stocks. This publication is dedicated to providing individual and professional investors a sophisticated and up-to-the-minute understanding of the trends that drive financial markets.3. Publication of “How to Make Money in Stocks”: This is a book written by O’Neil where he introduces his personal investing system, known as CAN SLIM. The system is based on a study of market winners, where he lays out a plan for selecting growth shares which are likely to rise in value. The book serves as an invaluable resource for anyone looking to succeed in the stock market, demonstrating O’Neil’s principles in a real-world context.

Frequently Asked Questions(FAQ)

Who is William J. O’Neil?

William J. O’Neil is an American entrepreneur, stockbroker, writer, and financial analyst. He is the founder of the business newspaper, Investor’s Business Daily, and a pioneer in the development of a systematic technique for selecting and investing in growth stocks referred to as CAN SLIM.

What is William J. O’Neil best known for?

William J. O’Neil is best known for his development of the CAN SLIM investment strategy and the creation of Investor’s Business Daily. His investment methodologies have been widely recognized and followed by individual and professional investors.

What is the CAN SLIM investment strategy and how did it come about?

CAN SLIM is a growth stock investing strategy formulated from the study of the 500 best performing common stocks in U.S. history. It was developed by William J. O’Neil and combines fundamental and technical analysis.

When and where was William J. O’Neil born?

William J. O’Neil was born on March 25, 1933, in Oklahoma City, Oklahoma, USA.

Has William J. O’Neil written any books?

Yes, William J. O’Neil has written several books regarding his investment strategies, with the most popular being How to Make Money in Stocks: A Winning System In Good Times or Bad.

What makes William J. O’Neil’s approach to investing distinct from other methods?

O’Neil’s approach to investing, the CAN SLIM strategy, is distinct as it blends both fundamental and technical analysis. It focuses on seven crucial components: Current quarterly earnings per share, Annual earnings increases, New products, services, management, or new price highs, Shares outstanding, Leader or laggard in the industry, Institutional sponsorship, and Market direction.

How did William J. O’Neil start in the finance industry?

William J. O’Neil started his career as a stockbroker with Hayden, Stone & Company where he eventually bought a seat on the New York Stock Exchange.

What is Investor’s Business Daily?

Investor’s Business Daily (IBD) is a leading financial news and research organization recognized for proprietary stock screens, comparative performance ratings and a record of identifying stock leaders as they emerge. It was founded by William J. O’Neil in 1984.

Related Finance Terms

  • Investor’s Business Daily (IBD)
  • CAN SLIM Investment Strategy
  • Growth Investing
  • Stock Market Research
  • Business Journalism

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