In this analysis, we seek robust conclusions and solutions in an investment problem under budgetary constraint and uncertainty. The concept of robustness is given by the Savage criterion. Uncertainty comes from ignorance of profitability rates of the investments (or placements), on a fixed...

In this paper we consider a family of investment projects defined by their deterministic cash flows. We assume stationarity—that is, projects available today are the same as those available in the past. In this framework, we prove that the absence of arbitrage opportunities is equivalent to...

The aim of this article is to briefly review and make new studies of correlations and co-movements of stocks, so as to understand the “seasonalities” and market evolution. Using the intraday data of the CAC40, we begin by reasserting the findings of Allez and Bouchaud 2011: the average...

Les actifs financiers sûrs sont au cœur de la finance de marché aujourd'hui. L'aptitude de tels actifs à protéger la valeur de l'épargne et des avoirs financiers, à servir de garantie à des prêteurs, à permettre aux entités souveraines de se financer ou encore aux banques centrales de...

In this note, we consider an economy with heterogeneous agents, differing by their time preference rate and by their beliefs. We show that at the Pareto optimum, the representative agent exhibits interesting behavioral properties. More precisely, starting from a standard model with expected...

Les enjeux macroéconomiques de la transmission des chocs monétaires via le canal étroit du crédit son nombreux. Ce sujet est amplement abordé dans la littérature d’un point de vue agrégé et empirique. Cependant, les prédictions testées reposent sur des spécifications théoriques...

Despite of its importance for the economy, stock ownership by households is poorly under- stood. Recent research has uncovered that expectations of stock market returns by individuals strongly correlate with stock ownership. This paper reports new Öndings from a survey that collected data on...

Les entreprises présentant des titres liquides créent-elles davantage de valeur ? En apparence, la liquidité semble appelée à ne jouer qu’un rôle secondaire dans la valorisation des firmes. Cependant, différentes théories économiques, corroborées par de nombreuses études empiriques...