Although they are the biggest Bull, what ark-invest say about Tesla, and other firms, is interesting. Ark is very bullish on what they call disruptive innovation. Companies that will be the future of new markets, making new markets or disrupting existing ones. I suspect this resonates with younger investors. There's lots of expectation that Tesla can execute on new battery technology, automated driving and scaling to produce new models.
The way I read the bull case it is if they can achieve autonomous driving that's the big game changer. But they may announce something at battery-day th