Bryan Fields, a Costco employee in Baltimore and member of Teamsters Local 570, told ABC News that the strike deadline comes after months of stalled conversations, extensions and failed negotiations with the company.

The strike authorization vote passed with an 85% margin, the union said. Investors didn’t seem concerned, however. Costco stock was up 1% to $952.28 in midmorning trading Tuesda

Members of the Teamsters union have authorized a strike against Costco on February 1 unless they reach a deal with the warehouse retailer before the current contract expires 31.