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.
There are several varieties of napa cabbage, but the two most common are michihili, a long cylindrical head with slightly open leaves at the top, and wong bok, the more familiar napa cabbage head, which is large and barrel-shaped, with tightly packed leaves.