• 1. down-and-out options: 敲出期权
• 2. down and out options: 下降敲出期权

• 1.Furthermore, with European down-and-out and down-and-in call options as an example, we discussed the impact and characteristics of the scale and long-time dependence on the barrier options.
  再者，我们以欧式下降敲出看涨和下降敲入看涨期权为例，讨论了标度和长期依赖性对障碍期权定价的影响程度及特征。
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