This article presents an application of extreme value theory to compute the value at risk of a market position. In statistics, extremes of a random process refer to the lowest observation (the minimum) and to the highest observation (the maximum) over a given time-period. Extreme value theory...

After a rapid expansion of financial transactions, both the authorities and financial institutions became aware of the risk involved in interbank settlement systems. To cope with the risk the systems in most economies have been designed so that large-sized payments are settled in the real time...

Purpose – Strategic alliances are often described as risky, dangerous, and instable. When firms adopt these strategies, they are confronted with a relational risk. Nevertheless, little empirical work has been down on relational risk in alliances. For this reason, this research is founded and...

When firms use alliance relationships, important decisions they must make concern: (1) How the alliance should develop in order to accomplish the parent firms’ objectives; (2) How they can manage relational risks in the alliance relationship. In order to find an answer to these problems,...

We propose a general framework to study the stability of the subspace spanned by P consecutive eigenvectors of a generic symmetric matrix H0 when a small perturbation is added. This problem is relevant in various contexts, including quantum dissipation (H0 is then the Hamiltonian) and financial...

The study of tail events has become a central preoccupation for academics, investors and policy makers, given the recent financial turmoil. However, the question on what differentiates a crash from a tail event remains unsolved. This article elaborates a new definition of stock market crash...