A bank is considering adding secuirtt underwriting services to the services it offers. It has estimated that the expected return and standard deviation of its traditional service are 8% and 10% respectively. It has estimated that the expected return and standard deviation of its new securities underwriting services are 16% and 20% respectively. The correlation between these services has been estimated to be -.3 and the bank estimates that 80% of its business will be from traditional services and 20% from the new services. What is the standard deviation of the new combined firm?

A) 7.8%

B) 10%

C) 12%

D) 15.5%

E) 20%

A bank is considering adding security underwriting services to the services it offers. It has estimated that the expected return and standard deviation of its traditional service are 8% and 10% respectively. It has estimated that the expected return and standard deviation of its new securities underwriting services are 16% and 20% respectively. The correlation between these services has been estimated to be -.3 and the bank estimates that 80% of its business will be from traditional services and 20% from the new services. What is the standard deviation of the new combined firm? 7.8% 10.0% 120% 15.5% 20.0%