Perils of Data Mining

From the time my book was published others have tried to improve upon the book’s Global Equity Momentum (GEM) model. There is nothing wrong with trying to improve on someone’s work. That is how progress is made. But if not careful, such attempts can have data mining, overfitting, and ex-post selection bias issues. Data mining…

Momentum Solutions for Retirement

by Matthew Richardson, JD, Ph.D. As the surge of boomer retirements continues, commentators have given new thought to what safe withdrawal rates are for retirement accounts.  The topic is especially significant given two additional factors. First, retirement balances are shockingly low for boomers (Ghilarducci 2015)[1].   Second, market fundamentals do not suggest that either bonds or…