The main index fell 1.3 percent today and is close to a 19-year low.
In 1990, the index fell by more than 19 percent.
Within 20 minutes after the market opened today, the index fell 350 points.
The index had fallen 11.3 percent from its recent high.
The index fell by more than 50 points twice during the day.
The index had fallen in three of the last four months.
At 2,517.02, the index is now down 38.2 percent for the year and has fallen in six of the last seven weeks.
And it is the first time the index has fallen below 1,200 since late 1998.
The worst was last fall, when the index fell 32.7 percent.
The index of current conditions fell to 93.5 from 101.2 in August.