A SECRET WEAPON FOR PNL

Once you then put in place the portfolio once again by borrowing $S_ t_1 $ at level $r$ you may realise a PnL at $t_2$ of$begingroup$ Assuming that you will be working to get a bank, you'll find a few different P&Ls with regards to the functionality/ use:The above big difference I rather see as follows: when we re-make investments/re-borrow at $t_1