Dan, do you know if there will be any plans to support Portfolio Cross-Margining once index futures are introduced? Otherwise the capital efficiency benefits of shorting futures as a hedge cannot be achieved and large amount of cash needs to be reserved to cover the futures short positions in case of a drawdown, which could otherwise be offset by the long-side portfolio gains.
Below is the summary from AI on the current state of affairs:
How Alpaca Currently Structure Margin
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Fixed Reg T Ratios: Alpaca enforces a strict 50% initial margin requirement for purchasing marginable equities and a 25% standard overnight maintenance margin.
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No Dynamic Offsets: Under standard Reg T, long equity positions and short positions are evaluated as independent lines of risk. The system does not dynamically calculate risk correlations to slash your overall margin requirement just because one position hedges the other.
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Buying Power Limits: They cap standard intraday buying power at exactly 4x (for Pattern Day Traders) and overnight buying power at exactly 2x your account equity. True portfolio margin systems regularly allow 6x to 10x leverage on highly hedged portfolios. [1, 2]
What This Means for Your Futures Roadmap
Because Alpaca does not offer true portfolio cross-margining today, when they do introduce futures, they will likely launch them in a separate sub-account structure (or an isolated risk segment) under Reg T guidelines. This means: [1]