$ During the "function circumstance" you liquidate the portfolio at $t_1$ realising its PnL (let me simplify the notation somewhat) WillWill 13344 bronze badges $endgroup$ 4 $begingroup$ Did you not say to begin with that $V$ is self-financing? In that circumstance there isn't any Price to finance it and also https://rafaeltaein.blogripley.com/34778080/pnl-options