Even if you've been through a stock market downturn before, it can be very difficult to sit back and watch your portfolio value plunge day after day.

China on Wednesday announced a new 50 percent tariff on U.S. exports, intensifying a trade war initiated by President Trump that is showing no signs of slowing down as it causes economic chaos around the world. “The U.S. threat to escalate tariffs on China is a mistake on top of a mistake and once again…