Calculating returns and standard deviation. Based on the following information, can you calculate the expected return and standard deviation for the two stocks?:
State of economy. Prob of st of econ Rate of return if state occurs
Stock A Stock B
Recession .25 .06 -.20
Normal .55 .07 .13
Boom .20 . .11 .33
The values provided for stock A and stock B in the question are putting in the table as follows:
FOR STOCK A | ||||||||||||||
STATE OF ECONOMY | PROBABILITY | RETURN | PROBABILITY * RETURN | (RETURN-EXPECTED RETURN) | SQUARED OF (RETURN -EXPECTED RETURN) | PROBABILITY * SQUARED OF (RETURN -EXPECTED RETURN) | ||||||||
A | B | C | D=B * C | E=C-D | F=E^2 | G= B * F | ||||||||
Recession | 0.25 | 6 | 1.5 | 4.5 | 20.25 | 5.0625 | ||||||||
Normal | 0.55 | 7 | 3.85 | 3.15 | 9.9225 | 5.457375 | ||||||||
Boom | 0.2 | 11 | 2.2 | 8.8 | 77.44 | 15.488 | ||||||||
0 | ||||||||||||||
TOTAL | 1 | EXPECTED RETURN OF STOCK A =7.55 | 0 | |||||||||||
VARIANCE=26.007875 | ||||||||||||||
FOR STOCK B | ||||||||||||||
STATE OF ECONOMY | PROBABILITY | RETURN | PROBABILITY * RETURN | (RETURN-EXPECTED RETURN) | SQUARED OF (RETURN -EXPECTED RETURN) | PROBABILITY * SQUARED OF (RETURN -EXPECTED RETURN) | ||||||||
A | B | C | D=B * C | E=C-D | F=E^2 | G= B * F | ||||||||
Recession | 0.25 | -20 | -5 | -15 | 225 | 56.25 | ||||||||
Normal | 0.55 | 13 | 7.15 | 5.85 | 34.2225 | 18.822375 | ||||||||
Boom | 0.2 | 33 | 6.6 | 26.4 | 696.96 | 139.392 | ||||||||
0 | ||||||||||||||
TOTAL | 1 | EXPECTED RETURN OF STOCK B =8.75 | 0 | |||||||||||
Variance of stock A=26.007875 |
|
VARIANCE=214.464375 | ||||||||||||
standard deviation for the stocks | A = Square Root of variance of stock A =5.10% | |||||||||||||
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