Le thème central de cet ouvrage porte sur l'adéquation des représentations théoriques du comportement décisionnel des agents et sur ses implications pour la pertinence des mesures de la juste valeur des instruments financiers. L'ouvrage vise en premier lieu à mettre en perspective le rôle...

We analyze the impact of takeover threats on long term relationships between the target owners and other stakeholders. In the absence of takeovers, stakeholders’ bargaining power increases their incentive to invest but reduces the owners’ incentive to invest. The threat of a takeover that...

We consider a multivariate financial market with proportional transaction costs as in Kabanov (1999). We study the problem of contingent claim pricing via utility maximization as in Hodges and Neuberger (1989). Using an exponential utility function, we derive a closed form characterization for...

We consider a financial market with costs as in Kabanov and Last (1999). Given a utility function defined on ${\mathbb R}$, we analyze the problem of maximizing the expected utility of the liquidation value of terminal wealth diminished by some random claim. We prove that, under the Reasonable...

We derive the implications from the absence of arbitrage in dynamic securities markets with bid-ask spreads. The absence of arbitrage is equivalent to the existence of at least an equivalent probability measure that transforms some process between the bid and the ask price processes of traded...

This paper examines how credit derivatives have changed the construction of an efficient portfolio. Credit derivatives provide a way of gaining exposure to credit risk alone, to the exclusion of interest rate risk. They also permit a relatively easy use of leverage. We examine two types of...

The authors examine the advantages of incorporating strategic exposure to equity volatility into the investment opportunity set of a long-term equity investor. They consider two standard volatility investments: implied volatility and volatility risk premium strategies. An analytical framework,...

La présentation de la théorie du stockage et de la notion de convenience yield permet d’exposer les fondements théoriques des modèles de structure par terme des prix des commodités. Ces derniers peuvent être utilisés pour réaliser des opérations de couverture ou dans le cadre de...

Leland’s approach to the hedging of derivatives under proportional transaction costs is based on an approximate replication of the European-type contingent claim V T using the classical Black–Scholes formula with a suitably enlarged volatility. The formal mathematical framework is a scheme...