The following are the returns and probability of returns of two securities:

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The following are the returns and probability of returns of two securities:

Probability0.100.300.400.20
Security-X15%20%5%10%
Security-Y25%30%35%40%

Calculate:

iii. Coefficient of variation for each security & iv. Which security is better and why?

i. Expected rate of return for each security,

ii. The standard deviation for each security,


Solution

i. Expected Rate of Return [e1c61d92 7a5e 4f62 ad42 29c94b4d0475]

image 173
  • Security-X:
image 175
image 179
  • Security-Y:
image 174
image 177

ii. Standard Deviation (bf3d89c7 6fa0 4930 9bc0 b63d558ef56c)

image 176

For Security-X [04952622 a1b0 4aeb 94dd 476dafc8f606]:

  • State 1: 0d3e4b34 044d 4d0e 8d5a 1d6e5a4546e3
  • State 2: d365da21 5992 41aa 86af 39e12351f814
  • State 3: 9f2d37e2 847a 4d41 af21 7e91b7778637
  • State 4: f7665c7c 7889 441f bcb0 db5e48e6b1fc
image 180
image 178

For Security-Y [02a5119f d20f 4ea5 885d 6fb5897868ce]:

  • State 1: a34bcad3 d789 426f b8dd 44c7abe8d240
  • State 2: 07516d61 eef6 4820 b69d 1e456ff39507
  • State 3: 781255eb b5c7 4c98 b219 91481eca3311
  • State 4: 865dccf8 4961 497c 85c3 26b1d9c734fa
image 181
image 184

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iii. Coefficient of Variation (fb87ee68 34d1 4b20 a29d f22139a6398f)

image 182
  • Security-X:
image 184
  • Security-Y:
image 183

iv. Which Security is Better and Why?

Security-Y is significantly better.

Reasons:

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  1. Higher Return: Security-Y offers a much higher expected return (33.50%) compared to Security-X (11.50%).
  2. Lower Absolute Risk: Security-Y has a lower standard deviation (4.50%) than Security-X (6.34%).
  3. Lower Relative Risk: Security-Y’s Coefficient of Variation (0.1343) is much lower than Security-X’s (0.5517), meaning Security-Y carries far less risk per unit of return.

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