19. An investor owns a portfolio that has 60% of its current market value invested in Bond A and 40% in Bond B. Bond A has a duration of 4.5, while Bond B has a duration of 8.3 . Initially when the investor purchased the securities, he put an equal amount of money in each of the securities even though the par value of Bond A is twice the par value of Bond B. The duration of the investor's portfolio is closest to: A. 6.4 B. 6.0 C. 5.8 19. An investor owns a portfolio that has 60% of its current market value invested in Bond A and 40% in Bond B. Bond A has a duration of 4.5, while Bond B has a duration of 8.3 . Initially when the investor purchased the securities, he put an equal amount of money in each of the securities even though the par value of Bond A is twice the par value of Bond B. The duration of the investor's portfolio is closest to: A. 6.4 B. 6.0 C. 5.8