Which one of the following statements related to risk is correct?

a. The beta of a portfolio must increase when a stock with a high standard deviationis added to the portfolio.
b. Every portfolio that contains 25 or more securities is free of unsystematic risk.
c. The systematic risk of a portfolio can be effectively lowered by adding T-bills tothe portfolio.
d. Adding five additional stocks to a diversified portfolio will lower the portfolio'sbeta.
e. Stocks that move in tandem with the overall market have zero betas.

Respuesta :

Answer:

c. The systematic risk of a portfolio can be effectively lowered by adding T-bills to the portfolio.

Explanation:

If we want to less the systematic risk of the portfolio so we have to add the t-bills so that the systematic risk could be minimized

The other statements that are mentioned are incorrect as for risk these statements are wrong

So only c option would be considered as correct

Hence, the correct option is c.