Stocks Slammed After Tech-Regulation Looms From Congress

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:

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

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

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