Costco ($COST) reports a 10.6% surge in June sales, but shares slide as technical indicators remain weak. Read the full market recap.

Costco Wholesale Corp (NASDAQ: COST) shares are trading lower Thursday morning as investors continue to weigh the company’s June sales update.

Costco shares fell over 4% despite strong June sales as investors focused on valuation concerns and uneven regional growth. While US demand remained robust, weaker Canada…