Last week market was very volatile. Hence, not worth playing UVXY such ones (very hard to timing).
VXX/XIV is good enough. 8%~9% swing with super hi-vol. Setup, enter and exit, all very easy. 绝对跑赢大盘 (SPY 3.5% change last week) 又十分安全.
Simply say. VXX could be counted as 1x Bear; While XIV 1x Bull. Their 52-wk swing as high as 4 ~ 5 times. Little decay. Good candidates.
In contrasts, 3x ETFs notorious for the decay, about 0.5% per day.