Suppose I have a $1M long position in SPY that I hold indefinitely. Separately, I sell short $1K of SQQQ and immediately use the $1K in cash proceeds to purchase QQQ.
How is the fee calculated? Is it ONLY the borrowing fee of roughly 2.5%-3% of $1K? Or, is it borrowing fee (2.5%-3%) + margin interest rate (5% on Robinhood, for example)? Is it very different across the brokers? Thanks for your help!