Mass fall of us Wall Street indices .

US indices fell on Monday with the opening ..

The Dow Jones index fell by 0.80% 

The Nasdaq index fell by 2.8%

The S & P 500 index fell by 1.7% . 

This decline is due to continued strong sales Last week,

investors feared a slowdown in the US economy

The declines are likely to continue in the short to medium term .