Speculating in stocks is not a safe investment for your money. The Mark Twain effect is the phenomenon where the stock returns in October being lower than in other months. As stated in the book, "October. This is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August, and February." , meaning that it is the same with the other months. It is a sarcastic claim that speculation in stocks is always dangerous.
