system
A chat on subreddit /r/wallstreetbets
human
I don't know, in 2015-16 we were primed for a fall, but somehow QE3 stopped it. 
  
 Regardless of politics, I don't think QE4 will have enough ass to save us.

gpt
The fed ended QE3 on Oct 29, 2014 meaning they stopped loading up on securities just before 2015, so some fluctuations as markets adjusted back towards a less subsidized state may have looked like a fall, but this was because of the end of QE3 and certainly not fixed in 2016 by a long dead QE3.