http://www.sec.gov/Archives/edgar/data/1552087/000104746917004657/a2232716z424b5.htm
http://www.sec.gov/Archives/edgar/data/1456772/000104746917004664/a2232714z424b5.htm
http://www.sec.gov/Archives/edgar/data/1671686/000117120017000324/i17349_3xoil-424b3.htm
http://www.sec.gov/Archives/edgar/data/1671686/000117120017000325/i17350_3xshortoil-424b3.htm
http://www.sec.gov/Archives/edgar/data/864270/000119312517230512/d422372d424b2.htm
http://www.sec.gov/Archives/edgar/data/67088/000119312517230811/d411708d424b2.htm
http://www.sec.gov/Archives/edgar/data/1051470/000119312517230895/d427823d424b5.htm
http://www.sec.gov/Archives/edgar/data/1051470/000119312517230897/d424620d424b5.htm
http://www.sec.gov/Archives/edgar/data/810961/000119312517230992/d426251d424b2.htm
http://www.sec.gov/Archives/edgar/data/19617/000119312517231099/d420248d424b2.htm
http://www.sec.gov/Archives/edgar/data/1039684/000119312517231283/d372521d424b5.htm