The tenuous truce between Donald Trump and the market may prove to be temporary

John Rapley is a contributing columnist for The Globe and Mail. He is an author and academic whose books include Why Empires Fall and Twilight of the Money Gods. Open this photo in gallery: Traders work on the floor of the New York Stock Exchange, on April 17.Richard Drew/The Associated Press Following the wild gyrations of the previous two weeks, an uneasy calm settled over markets this week thanks to President Donald Trump's partial retreat from his tariff blitz. He had little choice. His "Liberation Day" had sowed panic in markets, and all major asset classes - stocks, bonds and…