After the Stock Market Crash of November, 1929: A Supplementary Chapter to the Psychology of Speculation Issued in 1926

A critical analysis written in the early 20th century. This book serves as a supplementary commentary on the previously published work, focusing on the speculative atmosphere leading up to and following the infamous stock market crash of November 1929. It examines the behavioral and psychological factors that contributed to the crash and the widespread public belief in safe stock investment. In this book, Harper reflects on the rampant speculation that proliferated throughout society before the market’s collapse. He describes the transformation of stock trading from a high-risk endeavor to a popular activity embraced by everyday individuals, fueled by a belief in limitless profits. The text explores various cases of over-leverage, investor psychology, and the flawed assumptions that led to unsustainable market conditions. Harper contends that despite warnings, traders ignored caution, eventually leading to widespread financial ruin. In his conclusion, he emphasizes the crucial need for caution and understanding of psychological influences in investing, underscoring how the lessons of the past were likely to be forgotten as speculation began anew after the crash.