Mondelez International's shares took a tumble yesterday on the back of its 2015 numbers and its forecasts for 2016 - and were down again today. Chairman and CEO Irene Rosenfeld called the last 12 months "a year of very strong results" and, although conceding volumes would again be under pressure, forecast further improvement in profitability. What should we take away from the figures and from its outlook for the months ahead? Dean Best investigates.