$ In the "work circumstance" you liquidate the portfolio at $t_1$ realising its PnL (allow me to simplify the notation a little bit) La agudeza sensorial se refiere a la capacidad de observar o detectar pequeños detalles para ser conscientes de lo que ocurre a nuestro alrededor. David has aided https://www.youtube.com/watch?v=qMmsQ4kKgY4