A fairly large portion is man made panic, but it doesn't matter? At the end of the day, the global financial damage will be unfathomable. I'm mostly a technical trader and people say many technical tools are self-fulfilling prophesy, but at the end of the day, does it matter if they work?
People will have to come back out, but the real question is, what will they be coming out to, especially when there will be a severe lack of jobs for some time?
I'm an intra-day trader so I don't care too much what will even happen tomorrow in the markets. However, I am also very much looking forward to incredible investment opportunities, as should we all.