The Euro vs. the Japanese Yen. The Yen is a historically low-yielding currency, influencing traders to borrow cheaply in JPY to purchase higher-yielding currencies, including EUR. Because of this the pair is sensitive to broad-based market sentiment trend swings. Volatility may be found in news related to the Eurozone debt crisis and from the Bank of Japanโs anti-deflation policy efforts introduced in 2013.