Hi, I'd like to trade option credit spreads in a 401K using portfolio margin. However, I know that margin is typically NOT allowed in a 401K / retirement account. However, I found several online services that claim I can trade with PM in a 401K account using a self-directed 401K. Specifically, they said the process would be as follows: 1) apply for EIN for 401K trust entity at IRS website 2) use IRS approved 401K trust / plan documents 3) open a regular trust account at a brokerage, instead of 401K account 4) have trust account apply for PM privileges. Has anyone tried this? Is anyone using PM in a 401K / retirement account?