GETTING MY PNL TO WORK

$begingroup$ I'm undecided what you signify by "cross" consequences - the sole correlation is that they both are features with the alter in underlying ($Delta S$)To create The 2 approaches equivalent you need to imagine investing/borrowing $PnL_1$ at level $r$ in order that it stays within the process until $t_2,.$ At the moment yourDo I must multi