The low PE ratio suggests that Costco's stock may be undervalued, which could lead to an increase in its price if the market corrects this. However, the high PB and PS ratios suggest potential overvaluation, which could lead to a decrease in its price if the market corrects this. The high ROE shows that Costco is using its equity efficiently to generate profits, which is a positive sign for investors. However, the low EBITDA and gross profit suggest that Costco may face challenges in generating operating profits, which could negatively impact its stock price. The high revenue growth rate suggests that Costco is performing well in terms of sales expansion, which could positively impact its stock price.