What is 'Covariance'. 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.
23 September 2016. The heaviest red cabbage weighs 23.2 kg (51.15 lb) and was grown by David Thomas (UK), as verified at the UK National Giant Vegetables Championship in Malvern, UK, on 23 September 2016. David also holds the current record for Heaviest parsnip and Heaviest cucumber.
Chinese cabbage. Brassica rapa. There are two types of Chinese cabbage, Napa and bok choy. Napa types are barrel shape with tightly packed heads. Bok choy types form tall narrow heads with thick white stalks and deep green leaves.