 A Japanese currency-related exchange traded fund plunged on Tuesday, with the yen touching a 20-year low against the U.S. dollar, on diverging monetary policy outlook between Japan and the U.S. The CurrencyShares Japanese Yen Trust NYSEArca: FXY fell 1.5 on Tuesday and has declined 9.4 year-to-date. Meanwhile, the Japanese yen now trades at around 128.91 . 