jonas is colin langan -- joining us is colin langan. he is quite down on tesla as well. in, let's first talk about these two production chiefs, one of them being one of the highest earning executives at tesla leaving as they are wrapping up the model three. how bad of a sign is this? mr. langan: i mean, it is somewhat surprising. it is a large move. we have seen other management changes, so it is bit a bit concerning ahead of the report. we have seen deliveries of the model s wrapping slowly. somebody is being held accountable. it is a somewhat cautious sign for how it will go into q2. betty: there will be several points of focus. rating, to have a sell on tesla, how do you support that? mr. langan: if you look the last quarter, heading into the model three reveal, there is a lot of hype. this is a stock that has a lot of momentum, and we are shifting back to the fundamentals that meaning challenging. one of the big risks is we're going to depend for the next year and a half on model s and model s demand. s deliveries were down sequentially, and there's a big question --

david: ubs analyst colin langan. jon: the stock to watch ahead of the open.est retailer, walmart, reporting positive comparative sales for the seventh straight quarter. can the company when the online battle against amazon? walmart up almost 8%. ♪ david: you are watching bloomberg and want to bring you up-to-date on the egypt air situation. the minister of aviation is speaking in cairo about this incident. this is a plane that took off from charles de gaulle airport last night, on route to cairo. disappeared off of radar. a washington post report that says it swerved before falling 37,000 feet. we will keep you updated. bloomberg ifour you want to see what is happening. lisa: walmart shares are up around 8% after reported earnings that beat analysts estimates. joining us for more is joe , who has a market perform recommendation on the stock with a $65 price target. do you change a recommendation to overweight? joe: we are contemplating it. my recommendation has been they have been doing a lot of investment spending. at this year was going to be a heavy i