Fight Finance

(a) $127.50

(b) $171.14

(c) $173.33

(d) $174.56

(e) $354.06

(a) The more diversification is possible when those stocks are combined in a portfolio.

(b) The lower the variance of returns of an equally-weighted portfolio of those stocks.

(c) The lower the volatility of returns of an equal-weighted portfolio of those stocks.

(d) The higher the covariance between those stocks' returns.

(e) The more likely that when one stock has a positive return, the other has a negative return.

(a) 64%

(b) 40%

(c) 37.5%

(d) 25%

(e) 6.25%

You deposit cash into your bank account. Have you or debt?

(a) Systematic risk increases.

(b) Idiosyncratic risk increases.

(c) Total risk increases.

(d) Systematic risk decreases.

(e) Idiosyncratic risk decreases.

(a) Prefer more to less, meaning that they will always like to have more wealth.

(b) Be risk averse, meaning that they dislike risk as measured by the standard deviation of wealth.

(c) Have a positively sloped utility function, so the gradient or first derivative of the utility function is always positive.

(d) Have a utility function that increases at a diminishing rate. So the shape is concave down like a frown, or the second derivative is always negative.

(e) Have a utility function that rises until it reaches the satiation point, then it falls because too much wealth causes problems.

(a)##Red \sim \mathcal{N}(\mu, \sigma^2)##,   ##Green \sim \mathcal{N}(\mu, \sigma^2)##   and   ##Blue \sim \mathcal{N}(\mu, \sigma^2)##

(b) ##Red \sim \mathcal{N}(\mu, \sigma^2)##,   ##Green \sim \mathcal{N}(\mu, \sigma^2)##   and   ##Blue \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##

(c) ##Red \sim \mathcal{N}(\mu, \sigma^2)##,   ##Green \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##   and   ##Blue \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##

(d) ##Red \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##,   ##Green \sim \mathcal{N}(\mu, \sigma^2)##   and   ##Blue \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##

(e) ##Red \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##,   ##Green \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##   and   ##Blue \sim \mathbf{ln} \mathcal{N}(\mu, \sigma^2)##

(a) The returns ##r_\text{t monthly}## are continuously compounded monthly returns and are likely to be normally distributed, so the mean, median and mode of these continuously compounded returns are all equal to 1% per month.

(b) The annualised average continuously compounded return is ##\bar{r}_\text{cc annual}=12×0.01=0.1=12\%\text{ pa}##. The annualised standard deviation is ##\sigma_\text{annual} = \sqrt{12}×0.05=0.173205081=17.32\%\text{ pa}##.

(c) Over the next 10 years the mean, median and mode continuously compounded 10 year returns will all equal ##0.01 \times 12 \times 10 = 120\%##.

(d) Over the next 10 years the expected mean gross discrete 10 year return is ##e^{(0.01 - 0.05^2/2)×12×10} = 2.857651118## and the median gross discrete 10 year return is ##e^{(0.01 + 0.05^2/2)×12×10}=3.857425531##.

(e) If the current price of the CBA shares is $75, then in 10 years they’re expected to have a mean value of ##75×e^{(0.01 + 0.05^2/2)×12×10} = 289.3069148## and a median value of ##75×e^{0.01×12×10}=249.0087692##.

(a) Pay straightaway then you only have to pay $99.

(b) Pay on the 10th day then you’ll be asked to pay the full $100.

(c) Pay on the 11th day then you’ll be asked to pay the full $100.

(d) Pay on the 30th day then you’ll be asked to pay the full $100.

(e) Pay on the 40th day then you’ll be asked to pay the full $100 and the business owner may be upset with you and might not give you credit next time.

(a) 0%

(b) 30.102999566%

(c) 69.314718056%

(d) 100%

(e) 200%