I realize portfolio margin is a bit of a black box but I'm somewhat confused whether it only applies to direct hedges (eg. puts on long positions) or if it takes into account a simple diversity of things like being long (via ETFs) equities from different regions/sectors, bonds/treasuries, gold/metals, etc. So is there any benefit from portfolio margin vis-a-vis a diverse portfolio of asset classes held as ETFs (long only)? I have accounts at TD Ameritrade, Interactive Brokers, and Fidelity that I'd be considering switching to PM, just in case the answer is very much broker dependent. I don't day trade, almost entirely long term, try to align with the current macro trends, maybe a few <1 year swing trades with a minority portion of the portfolio. Currently using RegT margin at IB, levered about 1.6x. Mainly just want to increase my Max DD till margin call/liquidation head room.