The index dropped from 6.083 before the data release to a low of 5,992 just 40 minutes later after the US non-farm payrolls data showed that employment edged up by just 18,000 jobs in the month.
The increase was far short of analyst expectations for an uptick of about 90,000 jobs – and far below the 58,000 increase see in May.
BGC Partners market analyst Louise Cooper said the payrolls data had been greeted with “a collective gasp on the trading floor here”.
City Index chief market strategist Joshua Raymond said the data was “shockingly bad”.
“Everywhere one looks through the jobs numbers, there is not one inch of positivity about them,” he said.
“Investors fled risky asset classes en masse in the afternoon session, seeking defensive safe havens such as gold and the Japanese yen.”
The data pushed the US national unemployment rate up to 9.2 per cent from 9.1 per cent in May.
“America is the country that creates jobs - flexible employment laws are supposed to ensure that in an economic recovery, people are re-employed quickly and easily,” Cooper said.
“18,000 jobs created in a country of 400million people with a 9.2% unemployment rate means that more needs to be done. But what?”
The 18,000 rise in payrolls was the lowest increase in nine months.