NGL Energy Partners LP (NGL) shares ended the last trading session 8.8% higher at $11.1. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session. This compares to the stock's 8.6% gain over the past four weeks.The surge can be attributed to NGL Energy Partners strong foothold in diversified midstream operations and an expected improvement in demand for crude products in the United States. NGL Energy Partners LP, a diversified midstream energy partnersh ...