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Stocks making the biggest moves after hours: Bed Bath & Beyond, Costco and more

Maggie Fitzgerald

Shares of Bed Bath & Beyond BBBY initially jumped before reversing to trade 6% lower after hours Wednesday following the release of the retailer's mixed fourth quarter earnings. The retailer gave strong guidance, saying it sees full-year adjusted earnings per share between $2.11 and $2.20, topping expectations for $1.80. Costco COST shares fell as much as 2% after hours Wednesday following the release of same-store sales data.