isCusip: Check validity of CUSIP identifier

In yanlesin/SEC13Flist: Functions to Work with Official List of SEC Section 13(f) Securities and Security Identifiers

Check validity of CUSIP identifier

Description

This function check validity of CUSIP code by comparing calculated checksum digit based on first 8 characters of CUSIP code with 9th character of CUSIP code - checksum digit

Usage

isCusip(s)

Arguments

s	nine-character string with CUSIP code to validate

Value

Logical value indicating validity of CUSIP number: TRUE if CUSIP number is valid, FALSE if CUSIP number is invalid

Examples

library(SEC13Flist)
isCusip("B38564109") #invalid CUSIP example
isCusip("B38564108") #valid CUSIP example

yanlesin/SEC13Flist documentation built on Jan. 21, 2025, 5:23 p.m.