I've assumed that that would be the case, but apparently not! I had loans at various rates, with the lowest rates being the first ones I took out. When I closed a fraction of my trading positions later, it closed the more favourable loans as well (a 50% loan, 30 days), leaving the rest of the position with the more unfavourable loans (200%+ loans)! In my opinion this should not happen and the funds should remain available to me, not closed out. Seems like it closes loans in a FIFO fashion, thats why I lost the older, more favourable loans.