If I short AAPL at 500$, how much can the stock rise before I get a margin call?
Does it depend on how much Cash/Equity in other stocks I hold in my margin account? I just thought that if margin requirement for AAPL is 50% (say), then the stock must rise 50% from 500 $ before I get a margin call.
But obviously this is wrong and the calculation is more calculated.
I read this overview on IB but somehow it does not help me understand the margin call requirements. It is very confusing to me.