Or they have the systems in place to be able to manage the risk. I think AMP has $300 margins for ES but they're also an FCM so maybe that has something to do with it.
I asked the CME about this issue last year.
Here is the breakdown of what the guy said...
(Current maintenance of the ES)...$4,600
Source...
http://www.cmegroup.com/trading/equity-index/us-index/e-mini-sandp500_performance_bonds.html
The CME guy told me that no matter who you are...A clearing firm, non-clearing FCM etc, you must put up initial $4,600 to hold 1 contract in the ES at your firm, if your client is a "hedger" client. But as a speculator/non-hedge, you are subject to the 10%-per-contract-extra rule. So the Initial is actually $4,600 + $460 = $5,060. If they allow you the $300, the broker is on the hook for $4,760 in this case.
If your broker allows you to need only $300 equity in your account, then that means that they use $300 of your capital, and $4,300 of their own funds, to allow you to hold the position during the day. ($4,760 if a speculator/non-hedger) They are fronting you most of the money so you may trade that 1 position during they day.
If you decide to hold the position past the market close, the broker will most likely no longer cover your position for you. You will lose that loan they gave you so you could trade. This means that at 5PM ET it is now YOU that is on the hook for the $5,060 from your own capital account. The free ride is over at 5 PM. If you do not have the $5,060 + the worth of your open position at ETH close, they may liquidate you.
Each broker is different in how they handle this, and as we have seen, some brokers are more restrictive than others when it comes to allowing their clients to enter positions with smaller amounts of capital.
Bottom line...CALL YOUR BROKER TO GET THE SPECIFICS!
You cannot get an accurate answer here that covers everything you may encounter with your own broker. Call THEM, not EliteTrader. Unless you are trading with LightSpeed or Optimum...Those guys post here lots.
