Steve’s Barking; Alternative reason American Stock markets went down

I know you all heard various reasons that the American Stock markets went down on Friday Feb 2. Things like interest rates on bonds are the going up. Well let me give you another scenario, if you were paying Russian and there would be a possibility that because of sanctions you might have your holdings confiscated, wouldn’t you sell. What if you were a foreigner and suddenly you see the American dollar lose over 10 percent of it’s value, why would you keep American stocks. Now as stocks are going down, wouldn’t stocks most recently been bought on margin be put on call?