Six minutes after trading began on the New York Stock Exchange on Monday, it was suddenly halted. That's when the S&P 500 index had plummeted 7% and marketwide circuit breakers kicked in. Trading ...

Boris Johnson is considering imposing a two-week circuit breaker lockdown after warning earlier this week that infection “figures are flashing at us like dashboard warnings in a passenger jet, and we ...

Labour leader Sir Keir Starmer’s call for a short three-week “circuit breaker” lockdown is a shrewd political manoeuvre to put clear space between the government’s choices and the opposition stance.