They were exaggerated, but there were a few suicides, here is an excerpt from 1929: The Year of the Great Crash by William K. Klingaman "The wife of a Long Island broker shot herself in the heart; a utilities executive in Rochester, New York, shut himself in his bathroom and opened a wall jet of illuminating gas; a St. Louis broker swallowed poison; a Philadelphia financier shot himself in his athletic club; a divorcee in Allentown, Pennsylvania, closed the doors and windows of her home and turned on a gas oven. In Milwaukee, one gentleman who took his own life left a note that read, 'My body should go to science, my soul to Andrew W. Mellon, and sympathy to my creditors." This article from Snopes covers this topic.