Put spread premium is $7, if QQQ drops to 490, you will only incur 75% of the actual loss. If QQQ continue to drop, you can roll this down to next level, something like 495-465, and again, you will incur maybe 50-70% of the loss from 495 to 465.
All in all, when direction is right, you can protect your porfolio such that 50-70% of the drawdown is avoided.
In real life, stock hardly drop from 520 to 465 without any bounce, so there are other ways to gain more protection.
以今天qqq为例。June 20th, 520put 价格10.5， 490put 价格2.8. 520-490=30，10.5-2.8=7.7。
就是用7.7保护住$30价格。7.7/30=25%。 这钱也不少。
假如你把这个当成保护费，那也太贵了。何况你还会判断错误。
其他股票tsla, nvda, 差不多要占30%左右。如何做到三心的用1-5%保护全部?
你的保护费百分比 = 保护费用除以股价。
但是6月20日只剩下3周了，这保护费年化一下乘以17也挺吓人的。
一个省钱的办法是同时卖价外靠，或者靠价差，比如价外5-10%的那种。
或者在你买铺特价差的同时，卖个更价外的铺特，或者铺特价差，这样能降低费用，甚至做成有小额盈余。这种铺特鹰能保护一个区间，适用于QQQ这类指数，一般3-5年才见一次黑天鹅的。
糊涂你牛 ！
Put spread premium is $7, if QQQ drops to 490, you will only incur 75% of the actual loss. If QQQ continue to drop, you can roll this down to next level, something like 495-465, and again, you will incur maybe 50-70% of the loss from 495 to 465.
All in all, when direction is right, you can protect your porfolio such that 50-70% of the drawdown is avoided.
In real life, stock hardly drop from 520 to 465 without any bounce, so there are other ways to gain more protection.
聽説robinhood的也不好用
如果是大跌刚过，还在上升阶段，的确买puts会损害盈利。
不过也躲过了“腰斩”