this is an interview he did a few yrs ago www.advancedtrading.com/gold-book-2...id=MEDYA0ASEDJMOQSNDLRSKH0CJUNN2JVN#undefined "I've been flying aircraft and gliders since I was 16 years old. When one is flying gliders, it's a question of managing your altitude to avoid an out landing, and then to make a decision under a given stress. So maybe that's why I like what I'm doing for a hobby, gliding, and I like my business, managing money using quantitative approaches."