单向双向：某些产品的手续费只在开仓时收取，有些则在开仓和平仓时都收取； The sensitivities technique [2] includes initially calculating solution sensitivities often called the Greeks because of the common practice of representing the sensitivities making use of Greek letters. Esto en realidad puede llevar a graves dificultades a la hora de elaborar un mensaje, ya que centrarnos en las r... https://pnl90121.wssblogs.com/34160206/fascination-about-pnl