SpaceX is poised to make a historic market debut with an expected free-float market capitalization ranging from $440 billion to $530 billion on its listing day. The anticipated $1.75 trillion IPO is unprecedented in scale, with significant implications for Wall Street and its complex ties to the U.S. government. Nasdaq's new "Fast Entry" rule, effective May 1, 2026, will allow SpaceX to be quickly added to the Nasdaq-100 Index if its market cap ranks among the top 40 companies. This rule is seen as tailored for SpaceX, with potential implications for future listings by companies like OpenAI and Anthropic. Meanwhile, the S&P 500 is reportedly considering a similar mechanism, though specifics remain undisclosed.