Tech was particularly weak, with the Nasdaq Comp off -0.74%.

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The SPX registered a -1.5% loss and the Dow and Nasdaq Comp were both off -1.8%.

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The company said it now sees Q4 comp stores down 4% to 7%, with full year comp store sales off between 7.5% and 9%.

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For the week, the SPX and Dow both suffered -2.1% losses, and the Nasdaq Comp performed the poorest, off -2.7%.

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The Nasdaq Comp did not fare nearly as well, finishing the week off almost -1.0%.

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The company also saw a mid single-digit comp store sales decline in mobile computing due to a fall off notebook computer sales, in part reflecting a pick-up in tablet computer sales.

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The Dow and Nasdaq Comp were both down -0.2% and the SPX off -0.3%.

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Yes, there were plenty of headline-driven ups and downs, but for the week the Dow ended essentially flat, the SPX was off -0.2%, and the Nasdaq Comp gave up -0.1%.

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