Value at riskForums › Ask ACCA Tutor Forums › Ask the Tutor ACCA AFM Exams › Value at riskThis topic has 1 reply, 2 voices, and was last updated 4 years ago by John Moffat.Viewing 2 posts - 1 through 2 (of 2 total) AuthorPosts July 5, 2019 at 2:28 pm #521975 toushigaParticipantTopics: 424Replies: 172☆☆☆☆Hello Sir, for this lecture for topic value at risk https://opentuition.com/acca/afm/risk-and-uncertainty-part-2-acca-afm-lectures/even though the exam is not statistical but I’m wondering why n year is being square root to find the average standard deviation for n years? What is the reason behind? It just for purely understanding, Thank you. July 5, 2019 at 7:17 pm #521994 John MoffatKeymasterTopics: 56Replies: 53802☆☆☆☆☆It is because we can add variances but not add standard deviations, and the variance is the standard deviation squared.AuthorPostsViewing 2 posts - 1 through 2 (of 2 total)You must be logged in to reply to this topic.Log In Username: Password: Keep me signed in Log In