The answer: Nobody knows exactly. The market just crashed like in 2015, 2011 and 2010.
Here is a comparison of the latest 3 flash-crashes:
- 18 August 2015
- 1 August 2011
- 6 May 2010
Even while past data suggests a price bounce, bear in mind that the sell-off could continue in the next days.
"Know what you own, and know why you own it" - Peter Lynch