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Anadarko has already accepted a rival bid from Chevron.

The Nasdaq lost 18 points, or 0.2%, to 8,102.

The company, in that filing, said it will continue to evaluate restructuring options and review its capital structure.

All 11 sectors in the S&P 500 were lower, with banks and energy stocks the hardest hit.

Amazon lost 6.2 percent and Netflix gave back 8.4 percent.