After months fixating on complex infection curves, ambiguous corporate announcements and haywire economic data, investors risk being blindsided by an old foe: U.S.-Sino tensions. President Donald Trump and his administration have been sharpening their criticism of Beijing, demanding answers about the origins of the coronavirus pandemic as the death toll approaches 70,000 Americans. That raises the specter of a resumption in the trade war at the worst possible time for global markets already pricing in heroic expectations of an economic rebound. Expected volatility for American stocks is climbing as the S&P 500 ... (full story)