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| down-and-out option (这是一种障碍期权，在股票价格低于某个障碍价格时就自动到期无效) | |||
| down-and-out option; knock-out option | |||
| 下跌失效 期 权: 11 phrases in 3 subjects |
| Finances | 9 |
| Project management | 1 |
| Securities | 1 |
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