Stocks tumble at the open. Dow down for 3rd day in a row

Dow down close to -600 points

The US stocks opened sharply lower with the Dow industrial average trading down over 500 points. The NASDAQ index is down close to 200 points

A snapshot of the market shows:

• S&P index -62.37 points or -1.83% at 3328.
• NASDAQ index 190 points -1.66% at 11241
• Dow industrial average -570 points or -2.09% at 26886