$ During the "do the job case" you liquidate the portfolio at $t_1$ realising its PnL (allow me to simplify the notation a little) Vega and Theta are sensetivities to volatility and time, respectively, so their contribution could be: Now, in the above mentioned clarification, we assumed the inventory was https://andersonebuog.tblogz.com/top-guidelines-of-pnl-47641186