It could be anything. There will always be idiots reacting to the media and panic selling at the smallest sign of a correction. It takes 1 whale to panic sell, then a bunch of idiots see news like these during in a $100 correction, which as a result creates a panic selling period. It doesn't matter, the market will recover, and we'll see soon once again people that were on the fence on jumping in, crying about not having bought the dip.