$ Inside the "work scenario" you liquidate the portfolio at $t_1$ realising its PnL (let me simplify the notation a tad) $begingroup$ For an alternative with value $C$, the P$&$L, with regard to modifications from the fundamental asset price tag $S$ and volatility $sigma$, is provided by Evaluating P&L Statements https://charliefkorv.snack-blog.com/34051578/a-simple-key-for-pnl-unveiled