Committee on Uniform Security Identification Procedures, aka Committee on Uniform Security Identification Procedures, is a schema created in 1968. A CUSIP is a nine-character alphanumeric code that identifies a North American financial security for the purposes of facilitating clearing and settlement of trades. The CUSIP was adopted as an American National Standard under Accredited Standards X9.6. The CUSIP system is owned by the American Bankers Association and is operated by S&P Global Market Intelligence. Read more on Wikipedia...

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Example code from Wikipedia:

algorithm Cusip-Check-Digit(cusip) is
   Input: an 8-character CUSIP

   sum := 0
   for 1 ≤ i ≤ 8 do
      c := the ith character of cusip
      if c is a digit then
         v := numeric value of the digit c
      else if c is a letter then
         p := ordinal position of c in the alphabet (A=1, B=2...)
         v := p + 9
      else if c = "*" then
         v := 36
      else if c = "@" then
         v := 37
      else if c = "#" then
         v := 38
      end if
      if i is even then
         v := v × 2
      end if

      sum := sum + int ( v div 10 ) + v mod 10
   repeat

   return (10 - (sum mod 10)) mod 10
end function

Last updated January 18th, 2020

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