Go to Yahoo Finance $($finance$.$yahoo.com$)$ and download the historical adjusted close

monthly prices from $02/01/1999$ to $01/29/2024$ for Amazon $($tracker AMZN$)$

and Nvidia $($tracker NVDA$).$

$1.$ Calculate the month$-$on$-$month returns for both companies

$2.$ Calculate the average returns and standard deviations of the returns for

both companies for the full sample

$3.$ Now, calculate the average returns and standard deviations for Amazon for

the period pre $2009,$ and post $2009$ separately. What do you observe? What

does it teach us about the hidden assumptions behind the calculations made

in part $1?$

$4.$ Similarly, calculate the average returns and standard deviations for Nvidia

for the period pre $2015,$ and post $2015$ separately. What do you observe?

What does it teach us about the hidden assumptions behind the calculations made in part $1?$

$5.$ Calculate the covariance between Amazon$$s and Nvidia$$s returns for the

full sample, and comment on what you find.

$6.$ Calculate the return of holding both companies from the beginning to the

end of the sample

$7.$ Calculate the returns of holding both companies from the beginning of the

sample to march $2020,$ and compare your finding with those of part $6$