Shares of membership-based warehouse chain Costco Wholesale (COST -6.50%) took a step back on Friday after the company reported financial results for its fiscal second quarter of 2024. Sales came in a little lighter than analysts expected. And this is a primary reason that Costco stock was down 5% as of 10 a.m. ET. Costco's membership numbers are strong Among publicly traded companies, Costco has one of the oddest fiscal calendars with its fiscal Q2 ending on Feb. 18. During the 12 weeks leading up to Feb. ...