Sales soared, but valuation doubts weighed on the stock. Investors don't like the look of e.l.f. Beauty (ELF -15.87%) because, while the fast-growing cosmetics brand smashed estimates in its fiscal first-quarter earnings report, the market disliked its guidance for the second quarter, which includes sharply lower profit margins as it steps up marketing spending. As of 10:13 a.m. ET, the stock was down 14.5% on the news. e.l.f. delivered strong growth For the period ending June 30, e.l.f., which stands for " ...