Trump’s executive order on tariffs on Chinese products is a blanket 10 percent tax on everything coming in from the country. His proposed plans for Canada and Mexico are similarly broad: everything imported into the US from these countries would get a 25 percent tax applied, except for Canadian oil, which would be pegged at 10 percent.

U.S. President Donald Trump's fast-changing tariff decisions have super-charged market volatility and investor uncertainty, with little respite in prospect in the days ahead. There is potential for another Trump surprise on anything from tariffs to geopolitics,