I guess I meant why so much. I understand that on any particular day, a stock can be up or down by some small percentage on no news. But it's now down 10% for t

I guess I meant why so much. I understand that on any particular day, a stock can be up or down by some small percentage on no news. But it's now down 10% for the day. I'll buy the "options trading, short sellers" theory. Thanks!