Once you then put in place the portfolio all over again by borrowing $S_ t_1 $ at level $r$ you'll be able to realise a PnL at $t_2$ of Depreciation = worth at the start of your calendar year (opening harmony) + purchases in the 12 months − worth at https://beauhnrwz.iyublog.com/33221531/5-simple-techniques-for-pnl