[partiallypro]

You could have said the same thing about Enron. Some people have Tesla stock and don't even know it, because of their mutual funds and pensions.

[c0vfefe]

Those who own so little Tesla stock as to not be aware of it will also not be noticeably impacted by their failure. One could say that's the whole point of diversification.

[mobilefriendly]

Portfolio theory largely eliminates specific-company risk by having funds hold many companies.