The Russian rouble plummeted the furthest it's fallen in once day since 1998 during the default crisis. Capital flight has accelerated, raising the risk of emergency exchange controls and greatly affecting companies currently holding onto more than $680bm in external debt, according to the Telegraph.The Financial Conduct Authority has toughened regulations for loan brokers as some were found treating customers in a "blatantly unfair" way. The watchdog has claimed it will ban brokers from charging fees and requesting customer payment details unless it provides clear upfront information to people seeking credit, the Financial Times reported.Tesco has announced that it will be embracing a new management structure as new group chief executive Dave Lewis temporarily takes over the day-to-day leadership of its main UK operation. Lewis first became CEO at Tesco when three weeks before revealing the firm has overstated its expected first-half profit, Reuters said.