The Australian and New Zealand dollars are poised for tumbles as policy makers consider interest-rate cuts to spur growth, forecasts for next year show.  However, the outlook is improving for some of the world's most-battered currencies after a plunge in raw materials spurred routs for the Colombian peso to Russia's rouble in 2015. Analysts are forecasting gains for the currencies most linked to oil even as they see more declines in store for those with stronger ties to industrial metals, such as Chile's peso and Peru's sol. After its worst year in more than a decade, Canada's dollar may bounce back with ... (full story)