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.
Iceberg lettuce and cabbage form large, round heads of light green or purple in the center of their thick, leafy foliage, of light or dark green. Broccoli and cauliflower have thick plant stems with large, compact flower heads of dark green, white, or even purple, formed at the top. Celery has light green, fibrous stems and delicate, leafy tops, but leaf lettuce, spinach, chicory, collard and Swiss chard are all leaf vegetables, although coloring varies.