Balance of payments flows and exchange rate prediction in Japan

Monetary models of exchange rates tend to focus on inflation differentials to explain exchange rate movements. This paper assesses the ability of currency flows to predict exchange rate changes. The focus is on Japan. Currency flows are assumed to depend on the level of the current account and on the international investment position, where the latter is used as a proxy for international debt repayments. A state space model is used to predict simultaneously the exchange rate and its determinants. Using rolling regressions and out-of-sample predictions, it is shown that a model featuring currency flows can predict the direction of exchange rate movements better than a random walk (with or without drift). However, as happens with standard macroeconomic models, the model is not able to outperform a random walk in terms of the mean square prediction error criterio

Long swings in Japan’s current account and in the yen

The yen has experienced several big swings over recent decades. This paper argues that the fluctuations of the Japanese exchange rate resulted mainly from corresponding movements in the current account, which affected the demand for yen relative to other currencies. The paper builds a vector error correction model for the exchange rate and the current account, based on the idea that the exchange rate and its economic fundamental do not move too far apart over time. In addition, the model allows for a Markov-switching stochastic trend in the current account. Regime changes occur at uncertain dates, possibly in response to exchange rate changes. Bayesian estimation proceeds using an innovative Gibbs-sampling procedure. The empirical results suggest that recurrent structural breaks in the yen’s fundamentals account for the large fluctuations of the Japanese exchange rat

The purchasing power parity fallacy: time to reconsider the PPP hypothesis

This is a post-peer-review, pre-copyedit version of an article published in Open Economic Reviews. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11079-017-9473-9Traded good prices affect the real exchange rate first through their effect on the overall price level and second through their effect on the nominal exchange rate. Whereas the price level effect, which is positive in sign, is universally recognized, the nominal exchange rate effect, which is negative in sign, is routinely ignored. We calculate to which extent real exchange rate changes are accounted for by traded good prices and other components of the real exchange rate. We find that the nominal exchange rate effect neutralizes the price level effect entirely, suggesting that, contrary to popular belief, good market arbitrage is not conducive to purchasing power parity (the purchasing power parity fallacy). Rather than traded or non-traded good prices, the main driving force behind the real exchange rate is currency market pressure, a variable that, as we argue, is largely determined by the cumulative trade and capital flows of a countr

Current account reversals triggered by large exchange rate movements

Japan's long-lasting current account surplus as well as Germany's temporary surplus during the 1980s are the two largest current account surpluses the world has witnessed. Remarkably, net exports were rising in both countries despite the large overall appreciation of the Japanese yen and the considerable strength of the German mark. This paper shows that the real exchange rate still mattered for the export performance of these economies. It applies a Markov-switching time series model to the current accounts of both countries, in which the transition probabilities depend on the level of the real exchange rate. It finds that both countries¿ current accounts, while overall rising, experienced several setbacks and subsequent recoveries, with clear turning-points. It further demonstrates that current account reversals were triggered by the real exchange rate appreciating, or depreciating, too strongly

Boom-and-bust cycles marked by capital inflows, current account deterioration and a rise and fall of the real exchange rate

When the current account balance and net capital outflows do not exactly offset each other, net payment flows arise. Payment inflows into a country push the real exchange rate up, outflows push it down. This paper uses a model of optimal consumption and portfolio choice to determine the factors that drive international payment flows during boom-and-bust cycles. It shows that during such cycles, capital inflows first exceed the deficit on current account, strengthening the currency. Later on, when returns on domestic investments revert to their normal levels, the current account recovers, yet the overall decline of the international investment position provokes a fall of the real exchange rate even below its initial level. Case studies of countries experiencing rapid economic expansions followed by financial collapse confirm the paper’s theoretical prediction

Balance of payments accounting and exchange rate dynamics

The balance of payments is an accounting identity. Many wonder how the current and capital accounts, which add up to zero, can influence exchange rates. This paper shows how payment flows arising from balance of payments imbalances affect the demands for different currencies in the foreign exchange market over time. Based on a dynamical system approach, the paper demonstrates how international payments evolve depending on the joint dynamic behaviour of different balance of payments components. It finds that international payments and exchange rates interact in fundamentally different ways depending on whether a country restricts its capital inflows and outflows, whether capital flows are accommodating or autonomous and whether the exchange rate is fixed, flexible or, say, governed by a crawling peg. Empirical evidence from major industrial countries as well as from countries hit by currency crises support the paper's theoretical predictions.Balance of payments accounting Exchange rate determination Capital flows Currency crises