Modeling coordinated foreign exchange market interventions: The case of the Japanese and U.S. interventions in the 1990s

During the past thirty years, central banks often intervened in foreign exchange markets. Sometimes they carried out foreign exchange market interventions on a unilateral basis. However, central banks often coordinated their foreign exchange market interventions. We develop a quantitative reaction function model that renders it possible to study the factors that made central banks switch from unilateral to coordinated interventions. We apply our model to the intervention policies of the Japanese monetary authorities and the U.S. Federal Reserve in the yen/U.S. dollar market during the period 1991–2001. To this end, we use recently released official data on the foreign exchange market interventions of the Japanese monetary authorities. JEL no. F31, F33, G14, G15