Grinold and Kroner change, question, correct

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Despite discussions on the treatment for the change in outstanding shares, there remains some doubt on the correct approach. The answer to a question in the Schweser exam kit Vol 2 Exam 2 Afternoon session 22.1 shown that a negative change must be added which is keeping with the -S. However in the CFA exams where the change is negative it is deducted. Which is correct or are both correct depending on who you respond to?