Loading the player... Covariance is a measure of the degree to which returns on two risky assets move in tandem. A positive covariance means that asset returns move together, while a negative covariance means returns move inversely.
1. Rotterdam (the Netherlands) This Dutch harbor was the largest in the world, until Shanghai and Singapore grew even larger in 1986. This satellite photo gives an indication of the size of the Port of Rotterdam. (Image via Mannlines) About an hour and a half to the south of Rotterdam is Antwerp, the largest port in Belgium.
Weighing in at 131 tons, the - to date â largest ship propeller made in Waren on the MÃ¼ritz River drives the Emma Maersk, the worldâs largest container ship, with a load capacity of up to 14,770 twenty-foot containers, a length of 397 m, a width exceeding 56 m and a height of 68 m...