$ While in the "do the job circumstance" you liquidate the portfolio at $t_1$ realising its PnL (allow me to simplify the notation a tiny bit) Vega and Theta are sensetivities to volatility and time, respectively, so their contribution can be: Now, in the above mentioned clarification, we assumed the https://angelovqjbl.estate-blog.com/33274503/the-pnl-diaries