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.
The Russian tycoon was beaten to the only space in the harbour big enough to moor his giant vessel, Eclipse. 1  Chelsea battleship: Eclipse, the world's biggest yacht, owned by Russian businessman Roman Abramovich, lies at anchor off the coast of Antibes, near Nice, south-eastern France.