Valuable seriously. How can a lender use these day-to-day PnL calculations? In spite of everything the costs will swing day-to-day and there will be both income or loss According to the calculation. So, How can a bank use these daily PnL calculations? $endgroup$ $begingroup$ I estimate daily pnl with a https://www.youtube.com/watch?v=qMmsQ4kKgY4