Danish shipping and oil group A.P. Moller-Maersk says its losses deepened to $2.7 billion in the fourth quarter from $2.5 billion a year earlier, adding the whole of 2016 had been “a difficult year financially with headwinds in all of our markets.” For the full year, Maersk reported a loss of $1.9 billion, down from a profit of $925 million in 2015.