（　　），麦考利（Macaulay）为评估债券的平均还款期限，引入久期的概念。

单选题

（　　），麦考利（Macaulay）为评估债券的平均还款期限，引入久期的概念。

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材料题

资料：The Oakview Cafe12 Torpoint Hill, Aylesbury. Buckinghamshire. HP21 7SR01632 399 196 www.aokviewcafc.co.ukThe Oakview Cafe proudly presents Gordon Macaulay in a solo concert at 7 p.m. on 10 September .Mr. Macaulay is known for his poetic songs and fluid guitar playing. Lauren Tighe of The Aylesbury Record writes, Gordon Macaulay has one of the most melodious voices I have ever heard. Dont miss this rare opportunity to hear him in the intimate setting of the Oakview Cafe. Our award-winning che

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