Yen "Carry Trade" in play..

Yen "carry trade," investors are borrowing money in yen, where rates are low, and exchanging it for currencies in countries where rates are high—such as Australia, Canada and Mexico—profiting from the difference. Investors can also execute a carry trade by borrowing the lower-yielding yen to buy bonds denominated in higher-yielding currencies, such as local-currency government debt in places like Mexico and Brazil.