THE SINGLE BEST STRATEGY TO USE FOR PNL

$ During the "do the job circumstance" you liquidate the portfolio at $t_1$ realising its PnL (allow me to simplify the notation a tiny bit)The portfolio of bonds may have a particular DV01, which can be used to compute the PnL. Can another person notify me if this is true or is there one thing far more? For equities it should be just an easy sum o