A well-diversified portfolio includes investments in 50 securities. The portfolio\'s systematic risk is likely to be about Select one: zero because risk is eliminated with a portfolio of 50 securities or more. 25% of the total risk. 50% of the total risk. 40% of the total risk. Solution Total Risk = Unsystematic Risk + Systematic Risk Since the portfolio is well diversified with 50 stock the unsystematic risk is removed and what is left is systematic risk. Hence it can be said that the systematic risk is 50% of total risk..