: 3M stock suffers worst day since 2019 after judge denies protection from earplug lawsuits
Shares of 3M Co. declined 9.5% in Friday trading to lead the Dow Jones Industrial Average lower after reports indicated that a bankruptcy judge blocked a request from 3M that would have shielded the company from litigation around earplugs that were sold to the military and later alleged to have caused issues such as hearing loss.