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.
Chinaâs sky-high ambitions to build the worldâs largest everything have found a new outlet in Hengqin Island, a once sleepy southern isle thatâs uncoincidentally located next to the worldâs biggest gambling hub, Macau. Guinness World Records just declared the islandâs debut attraction, Ocean Kingdom, the worldâs biggest aquarium. A staggering 48.75 million liters (12.87 million gallons) of salt and fresh water helped it usurp the title from the Georgia Aquarium in Atlanta when it officially opened to the public last weekend.