老师，请问这道题是否用的是base法则呢

问题如下：

The carrying value reported on the balance sheet of Topmaker’s investment in Blanca’s debt securities at 31 December 2018 is:

选项：

$10,940,000.

$11,000,000.

$12,000,000.

解释：

A is correct.

Because the investment is designated as amortized cost, it is reported at the end of Year 1 using the effective interest method, whereby the amortization is calculated as the difference between the amount received and the interest income.

The amount received each period ($500,000) is based on the par value of $10,000,000 and the stated 5% coupon rate. The interest income of $440,000 is calculated by multiplying the 4.0% market rate by the initial fair value or amortized cost at the beginning of the period of $11,000,000. The difference between the $500,000 received and the interest income of $440,000 is the amortization amount, which is equal to $60,000.

The initial fair value of $11,000,000 is reduced by amortization, resulting in an amortized cost at the end of Year 1 of $10,940,000. This amount represents the carrying value reported on the balance sheet if the security is classified as amortized cost.

解析：该笔投资被归为Amortized cost，初始计量应该用历史成本入账，因此在2016年1月1日时的账面价值是11,000,000，当年I/S中计的interest income=11,000,000*4%=440,000。实际公司收到的现金流=债券面值*coupon rate=10,000,000*5%=500,000，比I/S中计的金额多60,000，多的钱还的是Topmaker公司的投资本金，因此Amortized cost资产的账面价值要相应摊销60,000，最终的carrying value=11,000,000-60,000=10,940,000。