Meanwhile, top losers in the sector included NGL Energy Partners LP (NYSE: NGL ), down 17 percent, and Contango Oil & Gas Company (NYSE: MCF ), down 12 percent. Equities Trading UP Stamps.com Inc. (NASDAQ: STMP ) shares shot up 31 percent to $198.75 as the company posted upbeat Q2 results and raised its FY17 outlook. Equities Trading DOWN CPI Card Group Inc (NASDAQ: PMTS ) shares dropped 34 percent to $1.67 following weak quarterly results.