Michael Meehan and his friends are often credited with causing the rise of the great bull market in the 1920s. They were a group of young Wall Street brokers who were known for their wild lifestyles and aggressive trading strategies. They would buy and sell stocks with reckless abandon, driving up prices and creating a frenzy of speculation. Their behavior is often seen as one of the main factors that led to the stock market crash of 1929 and the subsequent Great Depression. While their actions may have had disastrous consequences, they also helped to fuel the incredible growth of the American economy in the 1920s.