Dan diBartolomeo is President and founder of Northfield Information Services, Inc.  Based in Boston since 1986 , Northfield develops quantitative models of financial markets.  Dan is a Visiting Professor at the CARISMA research center of Brunel University in London.  In addition, he serves on the Board of Directors at the Chicago Quantitative Alliance and the advisory board of the International Association of Financial Engineers, Mr. diBartolomeo has written extensively for the CFA Research Foundation.  This work includes, "The Risk of Equity Securities and Portfolios" published in Equity Specialization Program Readings in 1997 and a new wealth management textbook Investment Management for Private, Taxable Wealth (with Jarrod Wilcox and Jeffrey Horvitz).