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Question 37 Jan $87.69 Feb $84.95 Mar $85.86 Apr $88.04 May $87.12 Jun $94.10 Using the above stock prices, calculate the his
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Answer #1

Historical standard deviation of returns of stock calculation

Month Stock Price (Pi) Return [xi = (P2 -P1)/P1] (xi- x-bar) (xi- x-bar)^2
Jan $87.69
Feb $84.95 -3.12% -4.62% 0.21%
Mar $85.86 1.07% -0.42% 0.00%
Apr $88.04 2.54% 1.05% 0.01%
May $87.12 -1.04% -2.54% 0.06%
Jun $94.10 8.01% 6.52% 0.43%
Average Return (x-bar) 1.49%
Sum [(xi- x-bar)^2] 0.72%
Variance = [∑(xi- x-bar)^2]/(5-1) 0.18%
Standard Deviation = √variance 4.229%
[Note: as there are 5 data points of stock return, therefore n = 5)

Historical standard deviation of returns of stock is 4.229%

Therefore correct answer is option: 4.229%

Formulas used in excel calculation:

D E (xi-x-bar)^2 1 Month 2 Jan 3 Feb 4 Mar 5 Apr 6 May 7 Jun А B Stock Price (Pi) Return [xi = (P2-P1)/P1] (xi-x-bar) 87.69 8

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