system
A chat on subreddit /r/wallstreetbets
human
Basically VIX spiked up huge and cause XIV to drop to a certain point that triggered termination of XIV. However the data on Credit Suisse was inaccurate and most of the volatility occurred after hours. Nobody knew if or when or how it was going to be closed.  XIV went from around $100 to $10 between 4-8pm. Next day it opened around $6-8 I believe. Totally legal, nothing fishy at all.

gpt
So if you shorted XIV you'd be golden