Many brokers don’t allow margins in certain kinds of accounts. That is not relevant.
ONce again, take a look at how far down the indexes are and once AGAIN take a look at how much each tick costs you if you are on the wrong side.
Sheesh, you can’t understand how that is going to generate margin calls?
Give it a rest.You are clueless
“Many brokers don’t allow margins in certain kinds of accounts. That is not relevant.”
Really? And what percent of the market is margined?