Do large investors increase the vulnerability of a country to speculative attacks in the foreign exchange markets? To address this issue, we build a model of currency crises where a single large investor and a continuum of small investors independently decide whether to attack a currency based...

The first generation models of currency crises have often been criticized because they predict that, in the absence of very large triggering shocks, currency attacks should be predictable and lead to small devaluations. This paper shows that these features of first generation models are not...

We ask when currency carry trades are associated with destabilizing dynamics in the foreign exchange market, and investigate the role of monetary policy rules in setting of such dynamics. In a model where the exchange rate has a long-term fundamental anchor, we find that carry trades can be...

High interest rates to defend the exchange rate signal that a government is committed to fixed exchange rates, but may also signal weak fundamentals. We test the effectiveness of the interest rate defense by disaggregating into the effects on future interest rates differentials, expectations of...

Currency crisis literature offers a broad area of research regarding the causes and impacts of the phenomenon. The literature recently focuses on the appropriate policy measures in the aftermath of a currency crisis; however the studies do not gather around a robust answer regarding the...

The viability of a fixed exchange rate system is shown to be state- or shock-dependent. We show, simply, Obstfeld's claim that there may be multiple equilibria - multiple shock values for which a regime switch becomes optimal. We distinguish between self-fulfilling and history-dependent crises....

Even though self-fulfilling currency attacks lead to multiple equilibria when fundamentals are common knowledge, we demonstrate the uniqueness of equilibrium when speculators face a small amount of noise on their signals about the fundamentals. This unique equilibrium depends not only on the...

Using a portfolio balance model of exchange rate determination, this paper develops a theoretical explanation of why central banks do not make precise announcements of their exchange rate targets. In foreign exchange markets, where it is common knowledge that the central bank intervenes to...

The swiftness and devastating impact of recent financial crises have taken many market participants by surprise and pose challenges for economists seeking a theory of the onset of a crisis. We propose such a theory based on two features. The actions of diverse economic actors which undermine the...

This paper puts recent theoretical developments in the literature on currency crises in perspective by comparing two theoretical approaches, one based on the speculative attack model of Krugman-Flood-Garber and the other approach, which evolved following the 1992-93 crisis of the European...