问

问题如下：

At the beginning of Year X, an investor allocated his retirement savings in the asset classes shown in the following exhibit and earned a return for Year X as also shown.

The portfolio return for Year X is closest to:

选项：

A.5.1% B.5.3% C.6.3%

解释：

C is correct. The portfolio return must be calculated as the weighted mean return, where the weights are the allocations in each asset class:

(0.20 x 8%) + (0.40 x 12%) + (0.25 x -3%) + (0.15 x 4%) = 6.25%, or ≈ 6.3%.