Sorry, I have to use some English here (West mix East). It takes too much time to type Chinese. So, VIX's weak point is "均值回归". 不管在什么样的市场 VIX冲得太高了, 总会回来. 不管什么样的市场, VIX跌得太低了, 也会涨回来. The range of VIX is between 0 - 100. I understand UVXY and XIV don't match with VIX perfectly, but we can buy VXX (1x) or UVXY (2x) when VIX is 12 and buy XIV when VIX is over 20 plus. This is what we should do in a 紅牛 market.
Now is 黑熊 market, so the VIX range has been changed. I'm still trying to find the (恐慌波动) range. The range could be (18 - 40) for now. Like I said in a previous post. We should buy UVXY when VIX dropped around 18 - 19. The 1st JUMP will be really fast and Furious. This is how I predicted Thur's move (buy UVXY between $34 - $38)- 在市场开始最惨烈的那一跌的时候具有非常有爆发力的做空作用. UVXY had about 54.88% gain since it hit the lowest ($35.04). By the time VIX goes over 30 (between 28 - 35), it will be the time to buy XIV again. We maynot see the gain right away, but we will.