I would call it the 3rd dotcom bubble, there was a pretty big one forming that popped during the 2008 financial crisis as well, at least in San Francisco.

Is there some news that I missed yesterday?

That wasn't really a fall, just a dissapointment. They still made a pretty hefty return on their investment there which adds to the cash position of the company and I'm sure the investors are pleased with the attempt to crack China.