Fight Finance

Courses  Tags  Random  All  Recent  Scores

Scores
keithphw$6,001.61
Yuan$1,726.43
Zin$1,619.43
Jade$1,555.80
Carolll$1,522.43
Visitor$1,428.33
Visitor$1,373.33
zy$1,349.70
cuiting$1,289.70
Visitor$1,268.61
Visitor$1,251.28
Visitor$1,249.70
Visitor$1,153.33
Emma Lu$1,100.00
Skywalke...$1,070.00
mm11$1,050.33
ninalee$1,039.70
Visitor$1,024.70
Visitor$1,015.61
Doris$1,009.70
 

Question 73  portfolio risk, standard deviation

Portfolio Details
Stock Expected
return
Standard
deviation
Covariance ##(\sigma_{A,B})## Beta Dollars
invested
A 0.2 0.4 0.12 0.5 40
B 0.3 0.8 1.5 80
 

What is the standard deviation (not variance) of the above portfolio? Note that the stocks' covariance is given, not correlation.



Question 83  portfolio risk, standard deviation

Portfolio Details
Stock Expected
return
Standard
deviation
Correlation ##(\rho_{A,B})## Dollars
invested
A 0.1 0.4 0.5 60
B 0.2 0.6 140
 

What is the standard deviation (not variance) of the above portfolio?



Question 292  standard deviation, risk

Find the sample standard deviation of returns using the data in the table:

Stock Returns
Year Return pa  
2008 0.3
2009 0.02
2010 -0.2
2011 0.4
 

The returns above and standard deviations below are given in decimal form.



Question 306  risk, standard deviation

Let the standard deviation of returns for a share per month be ##\sigma_\text{monthly}##.

What is the formula for the standard deviation of the share's returns per year ##(\sigma_\text{yearly})##?

Assume that returns are independently and identically distributed (iid) so they have zero auto correlation, meaning that if the return was higher than average today, it does not indicate that the return tomorrow will be higher or lower than average.



Question 308  risk, standard deviation, variance, no explanation

A stock's standard deviation of returns is expected to be:

  • 0.09 per month for the first 5 months;
  • 0.14 per month for the next 7 months.

What is the expected standard deviation of the stock per year ##(\sigma_\text{annual})##?

Assume that returns are independently and identically distributed (iid) and therefore have zero auto-correlation.



Question 556  portfolio risk, portfolio return, standard deviation

An investor wants to make a portfolio of two stocks A and B with a target expected portfolio return of 12% pa.

  • Stock A has an expected return of 10% pa and a standard deviation of 20% pa.
  • Stock B has an expected return of 15% pa and a standard deviation of 30% pa.

The correlation coefficient between stock A and B's expected returns is 70%.

What will be the annual standard deviation of the portfolio with this 12% pa target return?



Question 559  variance, standard deviation, covariance, correlation

Which of the following statements about standard statistical mathematics notation is NOT correct?



Question 560  standard deviation, variance

The standard deviation and variance of a stock's annual returns are calculated over a number of years. The units of the returns are percent per annum ##(\% pa)##.

What are the units of the standard deviation ##(\sigma)## and variance ##(\sigma^2)## of returns respectively?

Hint: Visit Wikipedia to understand the difference between percentage points ##(\text{pp})## and percent ##(\%)##.


Question 833  option, delta, theta, standard deviation, no explanation

Which of the following statements about an option (either a call or put) and its underlying stock is NOT correct?



Question 834  option, delta, theta, gamma, standard deviation, Black-Scholes-Merton option pricing

Which of the following statements about an option (either a call or put) and its underlying stock is NOT correct?

European Call Option
on a non-dividend paying stock
Description Symbol Quantity
Spot price ($) ##S_0## 20
Strike price ($) ##K_T## 18
Risk free cont. comp. rate (pa) ##r## 0.05
Standard deviation of the stock's cont. comp. returns (pa) ##\sigma## 0.3
Option maturity (years) ##T## 1
Call option price ($) ##c_0## 3.939488
Delta ##\Delta = N[d_1]## 0.747891
##N[d_2]## ##N[d_2]## 0.643514
Gamma ##\Gamma## 0.053199
Theta ($/year) ##\Theta = \partial c / \partial T## 1.566433
 

 



Question 934  standard deviation, risk

Which of the following statements about an asset’s standard deviation of returns is NOT correct? All other things remaining equal, the higher the asset’s standard deviation of returns:




Copyright © 2014 Keith Woodward