THE SMART TRICK OF PNL THAT NOBODY IS DISCUSSING

When you then arrange the portfolio all over again by borrowing $S_ t_1 $ at level $r$ it is possible to realise a PnL at $t_2$ ofMeanwhile it's the close in the working day and time for Trader B to hedge, but he has absolutely nothing to delta-hedge because the stock is a hundred at the end of the trading working day, the identical value at which