Donald Cassidy is senior research analyst and manager of money flows analysis for mutual fund tracking firm Lipper, Inc., where he tracks the movement of funds as driven by investor reaction to market performance. A popular speaker, Cassidy has been quoted in The Wall Street Journal, The New York Times, Barron's, Forbes, and other leading national publications. He has written a number of books for individual investors, including When the Dow Breaks and It's When You Sell that Counts!, and is a regular contributor to AAII Journal.