File photo of an employee of Bank Indonesia standing next to a giant one thousand rupiah coin on display...
An employee of Bank Indonesia stands next to a giant one thousand rupiah coin on display inside the bank's headquarters in Jakarta, Indonesia in this March 16, 2016 file photo. A new chat group on the instant messaging phone application WhatsApp is helping Indonesia's central bank improve its reputation for managing market expectations, something it has struggled with in the past. REUTERS/Garry Lotulung/Files