also with us, bloomberg gadfly columnist tim culpan, joining us now from san francisco.alk us through today. trade and tech -- the big stories of the day. talk about the selloff. >> it was a big day. that dominated the market. we were weak all day. you look at what happened as we hit the 3:00 hour on the east coast. all of the so orders -- sell orders started a pilot. no one was buying the -- started to pile up. no one was buying the dip. the s&p and dow started having their worst day since the february panic. dowthe stocks in the finished lower. the only sector that was up today was utilities. the reason was primarily because it was one of the few safe havens people saw they could move into. we saw a lot of other flight into safe havens, including treasuries, including the yen, including the swiss franc. a lot of people are also taking concern about some of the technical levels where we are heading today. if you take a look at where the s&p 500 traded today, we were well below the 50-day moving average heading into today, but then we broke the 100-day moving average, wh

emily: bloomberg's tim culpan in san francisco and romaine bostick in new york. know you will keep us posted. coming up, we focus in on one of the bigger tech stocks to tumble this week. that is facebook, as a response to what may be its biggest crisis to date. as public opinion sour on the social network, you will hear from a former facebook executive next. check us out on the radio. listen on the bloomberg app and in the u.s. on sirius xm. this is bloomberg. ♪ emily: facebook remains embroiled in perhaps its biggest controversy to date. the fallout continues in the wake of the exploitation of data on millions of facebook users by the political consulting firm cambridge analytica, which has ties to president trump. shares getting hammered this week. leading the larger slump in tech. facebook ceo mark zuckerberg broke his silence on the crisis with a mea culpa on cnn on wednesday. >> this was a major breach of trust, and i'm really sorry that this happened. we have a basic responsibility to protect people's data, and if we can't do that, then we don't deserve to

caught up with romaine bostick, editor of bloomberg's top live blog, and bloomberg gadfly columnist tim culpanthursday to talk through the market turbulence. tim: it is interesting, if you think of the areas that donald trump is talking about, essentially metals and so forth, metals and minerals only account for less than 7% of u.s. imports from overseas, so it is actually not a very, very big area. the largest area is electrical machinery, and that is a very broad term that includes everything from mobile phones to microwaves to electric motors. so, it is very broad, but that is a much larger area of imports. but then you look at the tech sector in the u.s. the largest company is apple, and of course, that is a hardware maker. then we have got amazon, google, and all those other companies, microsoft, they do not really do much hardware. and so, these are companies that if you put up barriers, you know, tariffs on -- who are you looking at there? because you know, the chinese, they make a lot of electronic products, of course the iphone and pretty much every smartphone in the world, apart from

bosline: thanks to romaine tick and tim culpan. the latest battleground in the debate.heube will van videos promote or link to website selling firearms and accessories and related videos with instructions on how to assemble firearms. coming up, uber's crash in tempe,, arizona. -- arizona. how big of an impact will it have on automated driving? this is bloomberg. ♪ caroline: no to the tragic death of a woman hit by an uber self-driving car in tempe, arizona. it brought fresh scrutiny to the automated driving technology. it had crossed at least one open late of road before being hit. self driving sensors should have detected her. ordered tests during we spoke to "bloomberg on tuesday." mark mark: i think companies a large arewaiting to see if there perception issues come if there was a car, if there was an issue vo that uber was using, or whether it was purely unavoidable, whether it was human or otherwise. weimo, gm aree, in autonomous vehicles or testing that technology. are we hearing any reaction from those companies? mark: toyota has suspended their economist testing