Abstract. In this paper, we survey prominent theories that have shaped the literature on sterilized foreign exchange interventions. We identify three main strands of literature: (1) that which deems interventions futile; (2) that which requires some market friction (i.e. limited arbitrage) in order for interventions to be effective; and (3) that which advocates the use of interventions as long as they convey signals on the stance of future monetary policy. We contribute to the literature in three important ways. First, by reviewing new theoretical models that have surfaced within the last decade. Second, by further penetrating into the theory of interventions in order to analyze the key features that make each model distinct. And third, by only focusing on sterilized operations, which allows us to sidestep the effects induced by changes in the stock of money supply. In addition, the models that we present comprise both a macro and microstructure approach so as to provide a comprehensive view of the theory behind exchange rate intervention.

In Colombia, the exposition to market risk has increased significantly since 2009. Nonetheless, the risk codependence among agents has not been analyzed yet from the perspective of this risk. Therefore, this paper presents an approach to estimate such relevance based on CoV aR and quantile regressions. This methodology is flexible enough to allow the estimation of the systemic market risk contribution of banks, pension funds, and between different types of financial institutions. Results suggest that risk codependence among entities increases during distress periods. JEL classification numbers: C20, G14, G21.

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In this paper we survey prominent theories that have shaped the literature on sterilized foreign exchange interventions. We identify three main strands of literature: 1) that which advocates the use of sterilized interventions; 2) that which deems sterilized interventions futile;and 3) that which requires some market friction in order for sterilized interventions to be effective.We contribute to the literature in three important ways. First, by reviewing new theoretical models that have surfaced within the last decade. Second, by further penetrating into the theory of interventions in order to analyze the key features that make each model distinct. And third, by only focusing on sterilized operations, which allows us to sidestep the effects induced by changes in the stock of money supply. Additionally, the models that we present comprise both a macro and micro-structure approach so as to provide a comprehensive view of the theory behind exchange rate intervention.