SpaceX-Tesla talk and Anthropic IPO raise S&P 500 inclusion questions
The gist
About $16 trillion tracks the S&P 500, and new giants like SpaceX and Anthropic may eventually join it.
Index rules and waiting periods decide when, shaping what passive investors end up holding.
How it unfolded
- Oct 26, 2026A Motley Fool article notes the S&P 500 has averaged around 10% annual returns long-term but calls S&P 500 index funds riskier these days.
- Oct 27, 2026CNBC reports Musk said on SpaceX's third-quarter earnings call he would consider a combination with Tesla, which would be the largest merger in history.
- Oct 27, 2026CNBC reports Anthropic filed an S-1 with the SEC on Monday, signaling its intention to go public.