Earlier quoted context omitted.
I thought his tweet was legal, assuming he wasn't lying about any of it, which indications are he wasn't. Maybe I don't understand...
The SEC complaint claims that "Musk knew or was reckless in not knowing that each of these statements was false and/or misleading because he did not have an adequate basis in fact for his assertions."
Again, I could be wrong, and I really wish I could remember where I found that article...