In: Finance
Month |
DJ |
SP500 |
Russ500 |
Nicky |
1 |
0.03 |
0.02 |
0.04 |
0.04 |
2 |
0.07 |
0.06 |
0.10 |
-0.02 |
3 |
-0.02 |
-0.01 |
-0.04 |
0.07 |
4 |
0.01 |
0.03 |
0.03 |
0.02 |
5 |
0.05 |
0.04 |
0.11 |
0.02 |
6 |
-0.06 |
0.04 |
-0.08 |
0.06 |
a) Average monthly rate of return for each index
Average monthly rate of return of DJ = (0.03+0.07-0.02+0.01+0.05-0.06)/6 = 0.0133
Average monthly rate of return of SP500 = (0.02+0.06-0.01+0.03+0.04+0.04)/6 = 0.0300
Average monthly rate of return of Russ500 = (0.04+0.10-0.04+0.03+0.11-0.08)/6 = 0.0267
Average monthly rate of return of DJ = (0.04-0.02+0.07+0.02+0.02+0.06)/6 = 0.0317
b) Standard deviation for each index
As the distribution is Sample, Stock’s Standard Deviation = √{1/(n-1)*∑(Ri-Rmean)2}
where, Ri is expected return of index i
Rmean is arithmetic mean of return
n is number of observation
Std dev of DJ:
Expected Return (%)R(i) |
R(mean) |
R(i)-R(mean) |
{R(i)-R(mean)}2 |
0.03 |
0.0133 |
0.0167 |
0.00028 |
0.07 |
0.0133 |
0.0567 |
0.00321 |
-0.02 |
0.0133 |
-0.0333 |
0.00111 |
0.01 |
0.0133 |
-0.0033 |
0.00001 |
0.05 |
0.0133 |
0.0367 |
0.00134 |
-0.06 |
0.0133 |
-0.0733 |
0.00538 |
Stock’s Standard Deviation = Square root of{sum [{R(i)-R(mean)}2] / (n-1)} = Square root (0.0113/5) Stock’s Standard Deviation of DJ = 0.0476
Std dev of SP500:
Expected Return (%)R(i) |
R(mean) |
R(i)-R(mean) |
{R(i)-R(mean)}2 |
0.02 |
0.0300 |
-0.0100 |
0.00010 |
0.06 |
0.0300 |
0.0300 |
0.00090 |
-0.01 |
0.0300 |
-0.0400 |
0.00160 |
0.03 |
0.0300 |
0.0000 |
0.00000 |
0.04 |
0.0300 |
0.0100 |
0.00010 |
0.04 |
0.0300 |
0.0100 |
0.00010 |
Stock’s Standard Deviation = Square root of sum [{R(i)-R(mean)}2] / (n-1) = Square root of (0.0028)/5 Stock’s Standard Deviation of SP500 = 0.0237
Std dev of RUSS500:
Expected Return (%)R(i) |
R(mean) |
R(i)-R(mean) |
{R(i)-R(mean)}2 |
0.04 |
0.0267 |
0.0133 |
0.00018 |
0.10 |
0.0267 |
0.0733 |
0.00538 |
-0.04 |
0.0267 |
-0.0667 |
0.00444 |
0.03 |
0.0267 |
0.0033 |
0.00001 |
0.11 |
0.0267 |
0.0833 |
0.00694 |
-0.08 |
0.0267 |
-0.1067 |
0.01138 |
Stock’s Standard Deviation = Square root of sum [{R(i)-R(mean)}2] / (n-1) = Square root of (0.0283)/5 Stock’s Standard Deviation of Russ500 = 0.0753
Std dev of Nicky:
Expected Return (%)R(i) |
R(mean) |
R(i)-R(mean) |
{R(i)-R(mean)}2 |
0.04 |
0.0317 |
0.0083 |
0.00007 |
-0.02 |
0.0317 |
-0.0517 |
0.00267 |
0.07 |
0.0317 |
0.0383 |
0.00147 |
0.02 |
0.0317 |
-0.0117 |
0.00014 |
0.02 |
0.0317 |
-0.0117 |
0.00014 |
0.06 |
0.0317 |
0.0283 |
0.00080 |
Stock’s Standard Deviation = Square root of sum [{R(i)-R(mean)}2] / (n-1) = Square root of (0.0053)/5 Stock’s Standard Deviation of Nicky = 0.0325
c) Covariance between the rates of return for the following indexes:
Cov (i,j) = √[1/(n-1)*∑{(Xi-Xmean)* (Yj-Ymean)}]
where, Xi is expected return of index i
Xmean is arithmetic mean of return of index i
Yi is expected return of index j
Ymean is arithmetic mean of return of index j
n is number of observation
DJ– SP 500
Expected Return (%) X(i) |
X(mean) |
X(i) - X(mean) |
Expected Return (%) Y(j) |
Y(mean) |
Y(j) - Y(mean) |
{X(i) - X(mean)}*{Y(j) - Y(mean)} |
0.03 |
0.0133 |
0.01667 |
0.02 |
0.0300 |
-0.01000 |
-0.000167 |
0.07 |
0.0133 |
0.05667 |
0.06 |
0.0300 |
0.03000 |
0.001700 |
-0.02 |
0.0133 |
-0.03333 |
-0.01 |
0.0300 |
-0.04000 |
0.001333 |
0.01 |
0.0133 |
-0.00333 |
0.03 |
0.0300 |
0.00000 |
0.000000 |
0.05 |
0.0133 |
0.03667 |
0.04 |
0.0300 |
0.01000 |
0.000367 |
-0.06 |
0.0133 |
-0.07333 |
0.04 |
0.0300 |
0.01000 |
-0.000733 |
Cov(DJ, SP500) = sum [{X(i)-X(mean)}*{Y(j)-Y(mean)}] / (n-1) = (0.0025)/5
Cov(DJ, SP500) = 0.0005
SP500–Russ500
Expected Return (%) X(i) |
X(mean) |
X(i) - X(mean) |
Expected Return (%) Y(j) |
Y(mean) |
Y(j) - Y(mean) |
{X(i) - X(mean)}*{Y(j) - Y(mean)} |
0.02 |
0.0300 |
-0.01000 |
0.04 |
0.0267 |
0.01333 |
-0.000133 |
0.06 |
0.0300 |
0.03000 |
0.10 |
0.0267 |
0.07333 |
0.002200 |
-0.01 |
0.0300 |
-0.04000 |
-0.04 |
0.0267 |
-0.06667 |
0.002667 |
0.03 |
0.0300 |
0.00000 |
0.03 |
0.0267 |
0.00333 |
0.000000 |
0.04 |
0.0300 |
0.01000 |
0.11 |
0.0267 |
0.08333 |
0.000833 |
0.04 |
0.0300 |
0.01000 |
-0.08 |
0.0267 |
-0.10667 |
-0.001067 |
Cov(SP500–Russ500) = sum [{X(i)-X(mean)}*{Y(j)-Y(mean)}] / (n-1) = (0.0045)/5
Cov(SP500–Russ500) = 0.0009
SP500–Nicky
Expected Return (%) X(i) |
X(mean) |
|