老师您好，原版书中有这么一段话，可否理解为ladder的protection from yield curve shifts and twists是由于它的现金流更分散，因此ladder的protection的作用比bullet和barbell都好？
A non-parallel shift or a twist in the curve, however, leads to very different outcomes for the bullet and barbell structures. An obvious advantage to the laddered portfolio is protection from shifts and twists—the cash flows are essentially “diversified” across the time spectrum.
