Christian Walter, ESSEC, actuary “agrégé” of the Institute of Actuaries, doctorate in Economics and “Habilitation à diriger des recherches” in Management Science, holds the Chair “Ethics and Finance” at the Collège d’études mondiales of the Fondation Maison des sciences de l’homme, Paris. He specializes in financial markets related issues (mathematical, economic, philosophical and historical) with interplays between history of science, modern financial approaches of pricing and ethical perspectives. He had a 30 years’ experience in financial industry in various areas covering asset allocation, risk management, performance measurement and quantitative products. Main articles cover: in-depth analysis of the market efficiency concept, Lévy modelling for behaviour of stock market prices and asset pricing, history of financial thought, critical analysis of the financial mathematical concepts. Last book: Extreme Financial Risks and Asset Allocation (with Olivier Le Courtois), London, Imperial College Press, Series in Quantitative Finance, 2014.