Emerging Market turmoil and contagion? No problem.

Tumbling 'hard' US economic data? Meh.

Tightening global central bank policies? Ha.

Admit 10s of million of "ad viewers" are robots:

Twitter CEO @jack on the purpose of his platform: "For our part, we see our platform as hosting and serving conversations... but also to increase the health of that conversation as well." pic.twitter.com/N4w4j6FnnO — ABC News Politics (@ABCPolitics) September 5, 2018

...and this happens...Twitter tumbles.

And fears over regulatory talk from the hearings in Congress are not going over well with investors...

.@MarkWarner: "The era of the Wild West in social media is coming to an end. Where we go from here though, is an open question." pic.twitter.com/GzZT6xZcNO — FOX Business (@FoxBusiness) September 5, 2018

Senator Mark Warner: "Congress will have to set social media regulations."