Jonathan Ferro highlights the market-moving news you need to know heading into the opening bell on Wall Street. U.S. stocks fluctuated in a flood of trading caused by expiring options and futures contracts. Treasuries rose and the dollar halted its rally as investors studied unprecedented government measures to shield jobs and economies from the coronavirus pandemic. Mohamed El-Erian of Allianz and Bloomberg Opinion, Andres Garcia-Amaya of Zoe Financial and Brian Sack of D.E. Shaw Group and former Federal Reserve Bank of New York executive vice president, discuss markets and policy responses to the coronavirus outbreak. El-Erian's opinions are his own. (Source: Bloomberg)