Tiffany (TIF +0.6%) sues Costco (COST +0.3%) in federal court over allegations of counterfeit...

|About: Tiffany & Co. (TIF)|By:, SA News Editor

Tiffany (TIF +0.6%) sues Costco (COST +0.3%) in federal court over allegations of counterfeit rings. The new suit contends Costco sold rings it falsely advertised were made by the luxury jewelry seller.