fwiw my yesterday's statement came several hours late today, yet it is now available. I don t freak out too quickly when there is an issue with the account window, i think it s mostly before market open on mondays but sometines a whole bunch of positions and the corresponding balance are missing, so far it's sorted itself out within a few hours.
Not sure what you are suggesting. If you trade futures, your account must be custody at an FCM in a seg account. That list is a list of FCMs. You can't just call them and trade.
If you own or lease a seat, you can hold an account at a clearing firm.. And use their platform to place orders. As long as a financial audit shows you of high net worth. Usually the balance in the account is not as great as for a FCM account.
I understand what your are saying. I'm registered with the NFA. I have clients that lease memberships. I have friends that are high volume MM on the CME. I have spoke to guys at futures trading groups that do massive volume. Not one custodies their funds and positions at the CME, they all do business with a FCM. I'm not saying it not possible, just not likely.
I see what your saying, the account is with a clearing firm, and that firm may have a FCM branch, I cleared through Singer/Wenger, they didn't have retail accounts. You could trade huge size relative to funds in account. The owner of the firm, could take you out of the pit if intraday risk metrics were above what they liked.