I've been trying to find what the hours are for day trading and for overnight trading are. I've searched Google and this forum and could only find that the exchange is open practically 24 hours a day. I went to the contract specs. on the CME website and it basically only said: Mon/Thurs 5:00 p.m.-3:15 p.m. & 3:30 p.m.-4:30 p.m.; Shutdown period from 4:30 p.m. to 5:00 p.m. nightly; Sun & Hol 5:00 p.m.-3:15 p.m. Month end(3:15 p.m.) LTD(8:30 a.m.)^^^^^ Can anyone help shed some light on what times is considered holding a position overnight so that I can figure out the margin needed for that time period? Thanks in advance!