artificially amplify information more transparency around who buys ads and how they are targeted and challenging suspicious logons and account creation. lawmakers are skeptical though and some are calling for talks the district or regulation. now for more let's bring in our wall street correspondent and scored against top notch social media executives admitting that things went wrong in the past but they're supposed to improve how did that go down on wall street. we saw losses specially when it comes to the stock of twitter a bit lost about six percent in value of facebook lost about two percent and is down since its all time high from early july by a good twenty percent what they're hearing showed is that it is difficult and probably old saw costly to make the necessary changes facebook for example said