Frank Williams' Rules

 Frank Williams' Rules most likely refers to "If You Must Speculate, Learn the Rules," a book written by Frank J. Williams in 1930. This book, written in the aftermath of the 1929 stock market crash, offers guidance on safe and responsible speculation in the stock market. 

Here's a more detailed explanation: 

• Context:

  The book was written during the Great Depression, a time of significant economic instability.
• Content:

  The book provides advice on whether one is suited for speculation, warning signs in one's financial situation, responsible use of margin trading, finding reliable information, and the importance of avoiding tips.
• Author:

  Frank J. Williams was likely an investor or financial writer who saw the need to guide individuals on how to navigate the complexities of the stock market during a precarious economic period.