不太理解这个题目对应的知识点

问题如下：

The maturity effect is least likely to hold for a:

选项：

A.low-coupon, long-term bond trading at a discount.

B.zero-coupon bond.

C.low-coupon, long-term bond trading at a premium.

解释：

A is correct. In some situations, the maturity effect may not hold for a low-coupon bond that is trading below par.

B is incorrect because the maturity effect will always hold for a zero-coupon bond.

C is incorrect because the maturity effect will hold for a low-coupon bond that is trading above par.

考点：maturity effect

解析：maturity effect在实践中的例外很少见。息票低（但非零息），长期且折价交易的债券，不适用maturity effect。