Worst Stock Decline Since Dec. 2008 Clobbers MV Companies

Stock market indexes took a nosedive today in part due to rating agency Standard &Poor's downgrade of the United States' credit from AAA to AA.

, and , investors in Mountain View companies decided to sell, sell, sell.

The Dow Jones Industrial Average lost 634.76 points or 5.55 percent to 10,809.85.

New York Stock Exchanged listed LinkedIn (LNKD:NYSE) fell 17.39 percent, $15.89 to $75.47.

As a result of the market turmoil, the tech-heavy Nasdaq lost 6.9 percent, its worst declined since Dec. 2008, when it dropped 8.95 percent. It decreased 174.71 points to 2,37.69.

The index took Google (GOOG:Nasdaq) along for a ride, which lost 5.7 percent, or $33.02 to settle at $546.

Complete Genomics (GNOM:Nasdaq) has also had a rough week. Last Thursday, Aug. 4, the investors sold 1,598,058 shares, the largest selloff since the companies initial public offering in Nov. 2010, for a stock decrease of -31.47 percent to $7.71.

While the company recovered on Friday, it lost all that gain today. Complete Genomics stock fell 10.82 percent and closed at $7.50.

Intuit (INTU:Nasdaq) dropped 6.10 percent, or $2.66 to $40.94.

Symantec (SYMC:Nasdaq) 6.43 percent, or $1.10 to $16.00.