This paper demonstrates that aggregate losses are necessarily low as long as we remain under the standard assumptions of LDA models. Moreover empirical findings show that the correlation between two aggregate losses is typically below 5%, which opens a wide scope for large diversification...

[fre] Le bien-fondé de la prise en compte des risques opérationnels (RO) dans la réforme Bâle II est maintenant couramment admis au sein de l'industrie financière. Au-delà des catastrophes majeures, qui peuvent expliquer son intégration dans le pilier I du futur dispositif prudentiel, la...

[fre] Cet article vise à présenter les grandes lignes du modèle risques opérationnels AMA (Approche de mesure avancée) du groupe Crédit Agricole SA, à en restituer les principaux enseignements et enfin à apporter un éclairage sur des questions encore en cours de discussion (notamment...

[eng] A Return to Average Rates in the European Exchange Rate Mechanism: 1987-1995 by Jean Sébastien Pentecôte and Thierry Roncalli . This paper studies the effect of the return to average daily rates for the European Exchange Rate Mechanism currencies and the dollar against the deutschemark...

Although portfolio management didn’t change much during the 40 years after the seminal works of Markowitz and Sharpe, the development of risk budgeting techniques marked an important milestone in the deepening of the relationship between risk and asset management. Risk parity then became a...

The ongoing economic crisis has profoundly changed the industry of the asset management, by putting risk management at the heart of most investment processes. This new risk-based investment style does not rely on returns forecasts and is therefore assumed to be more robust. In 2011, it has...

In December 2008, as the nancial and economic crisis continued on its devastating course, a new scandal erupted. After the 1998's failure of Long-Term Capital Management, Madoff's fraud once again discredits the hedge funds industry. This scandal is however of a dierent kind. Indeed, Madoff's rm...

In this article, we analyze the impact of weights constraints in portfolio theory using the seminal work of Jagannathan and Ma (2003). They show that solving the global minimum variance portfolio problem with some constraints on weights is equivalent to use a shrinkage estimate of the covariance...

With the recent development of the European debt crisis, traditional index bond management has been severely called into question. We focus here on the risk issues raised by the classical market-capitalization weighting scheme. We propose an approach to properly measure sovereign credit risk in...

Although portfolio management didn't change much during the 40 years after the seminal works of Markowitz and Sharpe, the development of risk budgeting techniques marked an important milestone in the deepening of the relationship between risk and asset management. Risk parity then became a...