That impressive growth gives Costco plenty of latitude to raise its membership fees (as it has done every five to six years) to offset inflation and other macroeconomic headwinds. It ended its latest quarter with 830 warehouse stores, compared to 809 a year prior, and it continues to expand its presence in Europe, Asia, and Australia. Costco's higher valuation could limit its upside potential in this volatile market, which favors cheaper value plays over stocks with a premium.