What matters here is not simply the 7.99% annual rate, but how much money is actually borrowed and how long it remains outstanding. Margin interest is generally accrued daily, so closing a position or repaying the borrowing earlier can directly reduce the financing cost.

The bigger lesson is that margin is not “free cash.” Even if you only use it temporarily, every day counts. A negative USD balance, an early withdrawal, or unsettled sale proceeds can quietly create financing costs.

For active traders, the key is therefore simple: borrow only what you need, repay as soon as practical, and always check the actual debit balance rather than assuming your account is fully settled.

@Tiger_AU [龇牙]