October 28, 1997. The Dow drops 500 points. Investors the world over receive a startling reminder that "what goes up, must come down." It is a profoundly unsettling experience for those of us who have either forgotten or have never known the experience of a bear market. Half of the money invested in U.S. stocks in this century entered the market from 1991-1996, making the dark days of October memorable for their bloodletting. Overall, this was just a scratch, and despite the optimism of so many investors, history has shown that the bear attacks time and time again.