单选题 The duration of a fixed-income portfolio is best interpreted as the:

A、 derivative of the price function for the bonds in the portfolio.
B、 percentage change in the portfolio"s value if interest rates change by 100 basis points.
C、 weighted average number of years to receive the present value of the portfolio"s cash flows.

【正确答案】 B

【答案解析】[解析] 该利率风险指标的使用者主要关注于投资组合的价格对利率变动的敏感程度。因此，本题的正确选项为B。