问题
单项选择题
As an investor continues to move downward on the efficient frontier, which of the following best describes the change in the: slope of the efficient frontier incremental return per unit of incremental risk（）
A. Increases Increases
B. Increases Decreases
C. Decreases Increasea
答案
参考答案：A
解析：
A portfolio is efficient if it (1) maximizes return for a given risk level, or (2) minimizes risk for a given return target. The efficient frontier represents the set of portfolios that will give you the highest return at each level of risk (or, alternatively, the lowest risk for each level of return).
