broadness you have work a responsibility and that was a huge mistake it was my but. a mistake that mark second birth will have to answer for in front of leading lawmakers in the us. ten and eleven the social media giant c.e.o. will be testifying before the u.s. congress he will likely talk about how facebook uses and protects user data and its plans to limit use the data extensible to other companies. and of course facebook being a heavyweight on the new york stock exchange there have been reactions right there let's talk our financial correspondent in new york so fishermans q.'s joining us hi sophie it's good to see you well we saw the facebook stock recovered today two percent in part of the trading session so does that mean that mark zuckerberg words were enough to calm down investors. well that is exactly what it looks like at the moment it has been a bumpy ride for this stop it dipped into correction territory and facebook shares