Q. Capital market line?

When their exists complete agreement between all investor with regards to a security Expected return, variance and covariance as well as on the rate of return on the risk free assets the effective set of portfolio could well be in linear form if it is true the reason for the investor consideration towards a specific portfolio depend on his indifferent curve and preference towards risk and return the linear efficient set facility each investor to allocate his funds among the various risk securities in the same relative proportion in addition to addition risk free borrowing and lending for achieving the personally preferred overall combination of risk and return . it can be recalled here that all portfolio located on the linear efficient set involves an investor in in a tangency portfolio combined with the varying degree of the risk free borrowing and landing therefore the linear efficient set enables every investment to participate in the market portfolio without the debarring him to reach it for want of his preference curves this is technically called separation theory.