It’s not like you can buy too much of an earning stock. I’m pretty sure elasticity approaches zero quickly if someone is dumping a well-known, profitable company. It might induce some paranoia, but big investors don’t get to where they are by panicking often.
By the way, TSLA has a P/E ratio in the 60’s so it’s not exactly a great deal anyway.
Depends. Amazon doesn’t even have one; tech stocks are often driven by future potential. I wouldn’t buy a car from them though.
Per capita, IIRC it peaks in the 70’s. I’ve heard it proposed that it was down to leaded gasoline causing brain damage, and it’s such a weird blip I have to consider that. Obviously, from WWII backwards through depression and prohibition it was plenty nasty.