Since years, the yen appreciates against the dollar, which makes Japan’s exports more expensive. Repeatedly, Japan’s government intervened in the foreign exchange market via the Bank of Japan with the most recent intervention in October 2011. An intervention to depreciate the exchange rate is done by purchasing foreign currencies / assets. In the case of Japan, this increases the supply of the Yen and, thus, leads to a decrease in its price. However, the past interventions only had very short-term effects and the exchange rate always bounced back to its original value – similar to the past interventions.
China with a pegged currency successfully maintains an underappreciated currency with all the benefits for its exports. Another example is Switzerland, which suffered from appreciation of CHF making exports more difficult. Recently, SNB announced to maintain by all means a weaker CHF and that it would be prepared to buy unlimited foreign assets to sustain the exchange rate of 1.20 franc per euro. Subsequently, the exchange rate indeed stabilized at the announced rate.
One of the main differences between the case in Japan and Switzerland is the determination of the bank. The Japanese one-time intervention is contrasted by the announcement of a permanent lower limit of the exchange rate in Switzerland. Why did Japanese choose a one-time intervention with the risk to be not effective similar to its previous interventions instead of a full-scale stabilization of the exchange rate? Read more of this post