But there is a non-statistical basis for concern: an ominous parallel with the financial environment that prevailed in the weeks leading up to the October 1987 stock-market crash. On that day — Black Monday — the Dow Jones Industrial Average dropped 22.6% in a single session.

President Donald Trump's updated tariffs and a weaker-than-expected jobs report are hitting US indexes. The S&P 500 headed for its third losing day.

Live Updates Live Coverage Updates appear automatically as they are published. Moderna Still Sickly 9:49 am In further earnings news, Covid-19 hero and S&P 500 component Moderna (Nasdaq: MRNA) reported fewer losses than anticipated this morning.