Wall Street lost ground on Tuesday, backing away from record highs as a viral outbreak from China found its way to U.S. shores and the International Monetary Fund (IMF) lowered its global economic growth forecast.  All three major U.S. stock averages fell following several days of record closing highs and their best one-week advance in months. The indexes extended their losses after the Centers for Disease Control and Prevention confirmed the first U.S. case of the coronavirus, which has now killed six people in China. “We’re seeing headline risk introduced to the market and any time there’s new uncertainties, we see more volatility and flight to quality and investors fleeing risk assets,” said Charlie Ripley, senior market strategist for Allianz Investment Management in Minneapolis. […]