COST stock is surging in early 2026. After a soft end to 2025, shares are up roughly 17% year-to-date (YTD). That rally reflects strong early-year sales and a broader retail bounce. Analysts credit Costco’s growth to new stores, digital expansion, and a defensive business model for the gains. In short, investors are willing to pay up for its consistent performance even though higher interest rates and an expensive valuation argue for caution.On the digital retail front, Costco upgraded its website with impr ...