Hi Guys iv been reading alot of literature on the efficient frontier lately. I can understand it but can't understand how a portfolio can be outside the efficient frontier? I have seen some sites which have portfolios marked outside the line and they state its unachievable to hold portfolios outside the efficient frontier.
What I was wondering is can a portfolio be held outside the frontier? if so I mean what would you hold in it? I assume less risky assets like property?