Well a couple things. First as another commenter pointed out i believe correctly, this tweet was sent before that aggreement was finalized so your point is moot

Well a couple things. First as another commenter pointed out i believe correctly, this tweet was sent before that aggreement was finalized so your point is moot technically. But let's assume for the sake of market integrity CEOs shouldn't lie. (doesn't stop politicians from getting elected or prosecuted but i'll leave that aside :). This was not as you seem to claim a lie. This was a forecast which cannot be proven before hand to be false or not. The exact tweet was: TESLA made 0 cars in 2011, but will make around 500k in 2019. Followed by a clarification that same day that he meant an annualized rate of around 500k. You can't factually prove this was wrong the day it was made. As it turns out it seems to me he got damn close and it was totally a legit forecast and not excessively bold but obviously you're welcome to have a different view.