To raise capital and fuel their growth. They raised 2 billion earlier this year at a price of 767 (1650 now) to fuel their growth because they thought there share price was high then. It seems like a perfect time to announce another massive capital raise to fuel their growth now that their share price is double what it was back then and this page [0] lists 1 trillion dollars worth of sp500 index funds and I know vanguard sp500 etf (voo) which isn't in that list has another 250 billion. sp500 is about 27 trillion so that list alone represents about 4.6% of the market.
TSLA joining the sp500 means those index funds alone will have to buy about 4.6% of TSLA to rebalance so this to me looks like an amazing opportunity to raise a ton of cash to fuel cybertruck/semi/roadster growth. 4.6% of TSLA 300 billion market cap could fuel a 13.8 billion dollar capital raise which could be announced after sp500 inclusion as a quick way to get those funds to the proper weighting.
At least that is my idea. During the call, they said they have 8 billion in cash so they don't need to raise any more capital. But then again, elon also said that right before their 2 billion dollar raise earlier this year so...
[0]: https://www.investopedia.com/articles/markets/101415/4-best-...