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。

youdao

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。

youdao