Shares of Costco Wholesale (NASDAQ: COST) were heading lower today even as there was no news out on the warehouse retailer. Instead, the stock fell in tandem with Walmart (NYSE: WMT), which spooked investors about the fourth quarter even as its third-quarter results were solid.

As a result, Costco stock was down 2.5% as of 1:02 p.m. ET, while Walmart had lost 7.6% at the same time.

Image source: Costco.

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Source Fool.com