rú guǒ / xié fāng chā / wéi / zhèng / shuō míng / liǎng gè / zī chǎn / de / jià gé / tōng cháng / huì / tóng xiàng / bō dòng

如果协方差为正，说明两个资产的价格通常会同向波动。

A positive covariance indicates that the prices of two assets usually move in the same direction.