I developed a short-only strategy and am wondering what I should use as benchmark for such strategy. I didn't find any short-only strategy on Quantopian. For me, I think the margin requirement for long strategy and short-only strategy is different, which makes the long-and-hold-SPY benchmark inappropriate.
For long strategy, I simply set initial notional amount equal to dollar value of securities that I long (aka. leverage=1). However, I don't think this is the case for short-only strategies.
I'm wondering if anyone has ever developed some short-only strategies and what we can use as benchmark. I wish someone could provide more details of margin requirement and leverage of strategies.
Any feedback is appreciated.
Thanks.