In theory, investors choosing to invest only in socially responsible entities restrict their investment universe and should thus be penalized in a mean-variance framework. When computed, this penalty is usually viewed as valid for all socially responsible investors. This paper shows however that...

When a financial crisis breaks out, speculators typically get the blame whereas fundamentalists are presented as the safeguard against excessive volatility. This paper proposes an asset pricing model where two types of rational traders coexist: short-term speculators and long-term...

Exploiting cross-sectional and time-series variations in European regulations during the July 2008 – June 2009 period, we show that: 1) Prohibition on covered short selling raises bid-ask spread and reduces trading volume, 2) Prohibition on naked short selling raises both volatility and...

Exploiting cross-sectional and time-series variations in European regulations during the July 2008 – June 2009 period, we show that: 1) Prohibition on covered short selling raises bid-ask spread and reduces trading volume, 2) Prohibition on naked short selling raises both volatility and...

Art is often used as an investment vehicle. Given the importance of market efficiency in finance, we use a large auction-based index to test whether the art market is weakly efficient. Evidence reveals that returns on artworks exhibit high positive auto-correlation. We attribute this result to...

We analyze in this paper how various forms of State intervention can impact the microcredit market in developed countries. Using a simple model where entrepreneurs borrow without collateral, we study the effect of different policies on microfinance institutions' lending behavior. We first...

We provide a comparison of salient organizational features of primary markets for foreign government debt over the very long run. We focus on output, quality control, information provision, competition, pricing, charging, and signaling. We find that the market setup experienced a radical...

In the aftermath of the financial crisis, market efficiency is being heavily criticized. However, the volatility-based criticisms rely on false grounds as efficiency and speculative bubbles are compatible. Indeed, the efficient market model is about rationality and information, not about...

L'hypothèse d'efficience des marchés n'a pas toujours été (et n'est toujours pas) admise facilement par les praticiens de la finance dont la pertinence du conseil en placements se trouve menacée au profit de stratégies indicielles passives. La littérature académique s'est donc attelée...

Nous avons étudié quelles annonces économiques font significativement réagir le marché des obligations privées aux Etats-Unis. Nous avons mesuré l’impact sur 1 jour d’une trentaine d’annonces macroéconomiques sur les spreads de crédit, en affinant notre analyse grâce à une...