TradingKey – Costco Wholesale Corporation (NASDAQ: COST) is down nearly 4.5% over the last week and about 17% from its 52-week high of $1,096.50 to trade around $915.

The recent drop came after the company’s sales update in June. The overall figures were solid, but investors were more interested in the weaker comparable-sales growth and indications that momentum could be fading. For a stock that has gained more than 175% over the past five years thanks largely to its highly successful membership model, even a modest slowdown can raise questions, especially with the shares still trading at a premium valuation.