The past few days have been volatile for markets: Headlines from China of protests and lockdowns are changing by the hour, while Russia's war with Ukraine lingers on and the economic picture at home shifts with every new piece of data. We're living through one of the most dynamic periods in recent memory. It's nearly impossible to estimate precisely when China will fully reopen from the Covid pandemic, or how technology stocks and interest will react to the next Fed speech. It would be more prudent, if you have the cash, to make a small buy on something reasonably priced…