excel - 将 9 位 CUSIP 代码转换为 ISIN 代码

Question

如何将 9 位 CUSIP 代码转换为 ISIN 代码(最好是在 Excel 中)？

Answer 1

CUSIP 完全包含在 ISIN 中。然后，ISIN 以 2 个字母为前缀(在本例中为“US”或“CA”，因为 CUSIP 是北美标识符)并在末尾添加一个数字。

确定末尾的数字:

ISIN US0378331005, expanded from CUSIP 037833100. The main body of the ISIN is the original CUSIP, assigned in the 1970s. The country code "US" has been added on the front, and an additional check digit at the end. The country code indicates the country of issue. The check digit is calculated in this way.

Convert any letters to numbers:

U = 30, S = 28. US037833100 -> 3028037833100.

Collect odd and even characters:

3028037833100 = (3, 2, 0, 7, 3, 1, 0), (0, 8, 3, 8, 3, 0)

Multiply the group containing the rightmost character (which is the FIRST group) by 2:

(6, 4, 0, 14, 6, 2, 0)

Add up the individual digits:

(6 + 4 + 0 + (1 + 4) + 6 + 2 + 0) + (0 + 8 + 3 + 8 + 3 + 0) = 45

Take the 10s modulus of the sum:

45 mod 10 = 5

Subtract from 10:

10 - 5 = 5

Take the 10s modulus of the result (this final step is important in the instance where the modulus of the sum is 0, as the resulting check digit would be 10).

5 mod 10 = 5

So the ISIN check digit is five.

_{来源:http://en.wikipedia.org/wiki/International_Securities_Identification_Number}