net install http://researchata.com/stata/203/fetchyahooquotes.pkg, force

fetchyahooquotes SHY BND SPY AAPL DIS BA AAL T WMT XOM DKNG F JPM BAC C CRWD BABA TSLA, freq(d) chg(ln) start(01jan2020)
save data_prices.dta, replace

use data_prices.dta, clear
gen obs=_n
tsset obs
gen port_1 = (adjclose_DKNG * 1000) + (adjclose_TSLA * 300)
gen ln_port_1 = ln(port_1/L.port_1)
gen port_2 = (adjclose_WMT * 35) + (adjclose_JPM * 120) + (adjclose_AAPL * 300)
gen ln_port_2 = ln(port_2/L.port_2)
save temp.dta, replace

use temp.dta, clear
collapse (sum) ln*
save temp_part1.dta, replace

use temp.dta, clear
collapse (sd) ln*
save temp_part2.dta, replace
use temp_part1.dta, clear

append using temp_part2.dta

xpose, clear varname
rename _varname symbol
rename v1 return
rename v2 sd
replace return = return * 100
gen ret_sd = return / sd
gsort -ret_sd

twoway (scatter return sd, mlabel(symbol)), scale (0.5)

* Given these companies: 
* 1) Place in the north-east quadrant of the risk-return chart (i.e. Boston)!
* 2) Place in the north-west quadrant of the risk-return chart (i.e. Seattle)!
* 3) Place in the south-west quadrant of the risk-return chart (i.e. Los Angeles)!
* 4) Place in the south-east quadrant of the risk-return chart (i.e. Miami)!