US stock market plungespublished at 13:46 Greenwich Mean Time 16 March 2020Breaking
The US stock market has temporarily halted trading, after the S&P 500 index dropped 8% on opening. It's the third time in six days this has happened.
The so-called "circuit breaker" is triggered automatically for 15 minutes when stocks fall 7% in morning trading.
The plunge comes despite central banks around the world announcing a co-ordinated effort to ease the economic and financial effects of the coronavirus.
The US has cut interest rates to almost zero and launched a $700bn stimulus programme in a bid to protect the economy.
But despite this there were steep falls across the major indexes. The Dow Jones Industrial Average plunged more than 9%.