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] requires initially calculating option sensitivities often called the Greeks because of the common practice of symbolizing the sensitivities working with Greek letters. La agudeza sensorial se refiere a la capacidad de observar o detectar pequeños detalles para ser conscientes de lo q... Successfully Submitted (Awaiting Approval)