Even if there were a way, you do not want to short something that jumps 15% in a day even if you believe it's overvalued. In the long run you might be right, bu

Even if there were a way, you do not want to short something that jumps 15% in a day even if you believe it's overvalued. In the long run you might be right, but when you get margin called it won't matter. Just 15 days ago, it was trading at $50.00: https://news.ycombinator.com/item?id=5398042 https://news.ycombinator.com/item?id=5398042