It was one seller - about 1.2 million sold in one hit... But...

It was one seller - about 1.2 million sold in one hit...

But why?

Who knows? Someone buying a car or a holiday or renovating? Someone jittery about the market as a whole or biotechs generally? An off-shore investor worried about the falling dollar? Someone who is bored or sees a better opportunity elsewhere? Or someone seeing the opportunity to sell more than a million shares without dropping the price too much.

It's the nature of this stock that a $100,000 sale or a $100,000 purchase will move the price significantly - maybe 50% or more at the moment.