BBC News
By Justin Harper
Tesla s rocketing share price this year has created an army of millionaires - self-named Teslanaires .
Shares in Elon Musk s electric car firm have risen more than 700% during 2020 to become the world s most valuable car company.
But it s been a roller-coaster ride for long-term investors with wild swings since it joined the stock market a decade ago.
For those who have stuck with Tesla, it has been a very wealthy journey.
This month was a milestone for the car company as it joined the S&P 500, an index of the biggest stocks in the US which includes the likes of Apple, Microsoft and Facebook. Tesla shares rocketed and it became one of the top 10 most valued companies on the index.