U.S. stock-index futures tumble 5% Thursday, triggering ‘limit-down’ rule. Here’s how limit rules and stock-market circuit breakers work
March 12, 2020 at 07:46 AM EDT
U.S. stocks have been experiencing some of the most volatile trading in the past decade this week and that trend continued into Thursday morning as the three main stock-index futures hit 5% limit-down rules for the second time this week.