Shares of Skechers (NYSE: SKX) have been in decline since its last quarterly report, despite the company’s reporting rising sales. The stock of sports apparel companies Nike (NYSE: NKE) and Under Armour (NYSE: UA) (NYSE: UAA) are also in decline, but that seems more directly related to the fact that their sales are hitting the brakes. Meanwhile, Skechers reported a 16.9% increase in net sales for the second quarter.