... 时间价值（Time Value） 时间价值损耗（Time Value Decay） 波幅（波动率，Volatility） ...
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时间价值衰减
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time value decay
时间值衰减
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The speed with which an option loses value is called time decay, which becomes steeper as the expiration nears.
期权失去价值的速度叫时间衰减，越接近到期日，衰减越快。
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Most of what has been produced has been lost due to the ravages of time, ignorance of its value, chemical decay and technological obsolescence.
UNESCO: Communication and Information
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