Q.5. a) A portfolio management organization analyzes 60 stocks and constructs a mean- variance efficient portfolio that is constrained to these 60 stocks. How many estimates of expected returns,...

Extracted text: Q.5. a) A portfolio management organization analyzes 60 stocks and constructs a mean- variance efficient portfolio that is constrained to these 60 stocks. How many estimates of expected returns, variances and co variances are needed to optimize this portfolio as per Markowitz' Model and Sharpe's Model.