What's Happening Wholesale club Costco ( COST ) is scheduled to report its fiscal fourth-quarter results on September 29 after the market close. A big reason for the concern is that for years Costco enjoyed same store sales growth in a range of 6% and 7%, but that figure has fallen to around 4% in recent months, in part a result of the strong dollar that has led to deflation in many product categories. Technical Analysis COST was recently trading at $152.98, down $16.75 from its 12-month high and $14.41 above its 12-month low.