The standard deviation of the portfolio is directly proportional to the
correlation of assets within the portfolio.
Portfolio Management MCQ - Portfolio Management Section 1
The efficient frontier is the part of the minimum variance frontier which
represents the set of portfolios that will give the highest return at each
risk level.
With the efficient frontier we are only allowed to invest in risky assets.
With the CAL this constraint is relaxed and we are also allowed to invest in
the risk-free asset.
The use of leverage and the combination of a risk-free asset and the
optimal risky asset will dominate the efficient frontier of risky assets (the
Markowitz efficient frontier).
The optimal risky portfolio lies at the point of tangency between the capital
allocation line and the efficient frontier of risky assets.

