-Fatima: Covariance lies within the range -1 < Covariance < +1
-Taimour: The covariance of a stock with itself is equal to its own variance.
-Vishal: The covariance of returns is negative when the return of one asset is above its expected value given that the return on the other asset tends to be below its expected value.
The statements made by which of the students are most likely correct?