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Cisco, Walmart stocks exact 20-point toll on Dow industrials, in early action

The Dow Jones Industrial Average was tipping lower in early trade Thursday, with declines in shares of Walmart Inc. and Cisco Systems Inc. producing the stiffest headwinds for the blue-chip gauge. Shares of Walmart were down even as the giant retailer earlier in the premarket reported first-quarter earnings and sales beat expectations. Meanwhile, Cisco's stock was under pressure after services revenue at the networking giant fell short of Wall Street expectations.