According to ZH, the most recent sell-off was halted by the
FED: https://www.zerohedge.com/news/2018-02-27/did-fed-save-wall-street-temporary-qe4
The bankers know they can't afford another collapse like in 2008, so they'll keep propping it up. How long this charade keeps going is anyone's guess.
I read that article as well, it was interesting but im skeptical of ZH these days.