$ In the "work scenario" you liquidate the portfolio at $t_1$ realising its PnL (allow me to simplify the notation a bit) Vega and Theta are sensetivities to volatility and time, respectively, so their contribution can be: Stack Exchange network contains 183 Q&A communities like Stack Overflow, the largest, most https://remingtonjfrva.bloggazzo.com/33197537/pnl-options