What are the two types of risk a market participant is exposed to when purchasing a stock?

What does variance represent in the context of stock returns?

What is the definition of covariance in stock analysis?

What is the size of a variance-covariance matrix for a portfolio with 'k' stocks?

What does the value representing the covariance of a stock with itself signify?

What is the primary limitation of the variance-covariance matrix in stock analysis?

What is the key objective of calculating the correlation matrix in portfolio management?

What is the definition of an excess return matrix?

What does 'n' represent in the formula for calculating the variance-covariance matrix?

What type of matrix is formed by interchanging the rows and columns of an original matrix?