PALL:PPLT as of Good Global Growth Measure as there is. http://stockcharts.com/c-sc/sc?s=PALL%3APPLT&p=D&yr=5&mn=0&dy=0&i=t38949575421&r=1496342582818 Both are industrial metals but PALL more so than PPLT, which along with gold, is also held as insurance against global calamity.