Mr. Arnott served as Editor of the Financial Analysts Journal. He has authored over one hundred articles for journals such as the Financial Analysts Journal, the Journal of Portfolio Management and the Harvard Business Review.

In 2002, he established Research Affiliates, LLC to offer sub-advisory services, software and asset management models. He has joined forces with PIMCO, serving as a sub-advisor, to offer a global asset allocation product to make active use of liquid alternative markets, beyond conventional stocks, bonds and cash.

In the past, he also served as a Visiting Professor of Finance at UCLA, on the editorial board of the Journal of Portfolio Management and two other journals, and on the product advisory board of the Chicago Board Options Exchange and two other exchanges. He previously developed quantitative asset management products and teams as Chairman of First Quadrant, LP, President of TSA Capital Management (now Analytic Investors) and as Vice President at The Boston Company (now PanAgora), and served as global equity strategist at Salomon (now Salomon Smith Barney). He graduated summa cum laude from the University of California in 1977 in economics, applied mathematics and computer science.