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.
Beauty and the (endless) beach. Play Video. Lying stretched along the Equator, steamy and volcanic Indonesia is the world's largest archipelago, home to over 230 million people. Lately, this beautiful place has had a string of bad luck, including tsunamis, fires, and political instability.