system
A chat on subreddit /r/wallstreetbets
human
I can't see how it can go boobs up. Unless, of course, the corporate debt does not blow up.

gpt
It can go tits up if the credit cycle doesn't tighten within your window. A tightening would necessitate a re-evaluation of the underlying bonds' ratings which would probably cause a string of downgrades. Once you get downgraded from BBB to junk, institutions will dump them en masse. They're required to keep a certain amount of investment-grade and some are not allowed to hold junks. 
  
 That's what you're betting on. You're betting on the credit cycle.