Shares of Costco Wholesale Corporation ( COST ) fell roughly 1.5% after the company posted comparable-store sales (comps) data for the four weeks ended Feb 1, 2015 that came below analysts' expectations. Excluding the effect of deflation in gasoline prices and the impact of foreign currency fluctuations, Costco's comps for January rose 7%, reflecting an equivalent increase across its U.S. locations and a 6% jump at its international outlets. Coming to Costco, comps for the 22-week period increased 3%, buoyed by a 5% rise at its U.S. locations, partially offset by a 1% decline at its international locations.