Palo Alto Networks is a super high flying stock. It is a sector leader, it is in IBD 20 big cap growth stock, and in the top 50 growth stocks in the USA.
It jumped on earnings 20 dollars on 2/25/2019. By yesterday by 4 trading days it lost about 20 dollars. Why?
there was no bad news, market was not overly selling away. So we do not know. But price does have all the info that we need to trade!
We do not know why sometimes. But what does that matter!
Cut your looses short and move on. I did that and sold on March 1st and went long on QLD. Why? because the market is in uptrend.