The latest trading session saw Costco (COST) ending at $816.88, denoting a +1.88% adjustment from its last day's close. The stock's performance was ahead of the S&P 500's daily gain of 1.04%. Meanwhile, the Dow gained 0.76%, and the Nasdaq, a tech-heavy index, added 1.03%.Shares of the warehouse club operator have depreciated by 8.97% over the course of the past month, underperforming the Retail-Wholesale sector's loss of 8.36% and the S&P 500's loss of 6.74%.The upcoming earnings release of Costco will be ...