Retail investors provide week’s only bright spots for biotech amid downturn

In a volatile week for markets spooked by fears of a spreading COVID-19 outbreak, retail investors have been driving volume in shares of a handful of U.S. biotechs pursuing products against the virus.

A late rally spared major indexes another day of steep declines Friday but they still ended the week in correction territory, with the Dow Jones Industrial Average falling 12%, the S&P500 losing 11% and the NASDAQ Composite dropping 11%...