Giant IPOs From SpaceX to OpenAI Put Index Rules Under Pressure

Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the worldAmericas+1 212 318 2000EMEA+44 20 7330 7500Asia Pacific+65 6212 1000Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the worldAmericas+1 212 318 2000EMEA+44 20 7330 7500Asia Pacific+65 6212 1000SpaceX:For decades, the path into America’s most important stock benchmarks followed a predictable rhythm: go public, prove yourself, wait your turn. Now the three firms that control those benchmarks are considering whether to rewrite the rules to absorb trillion-dollar IPOs from SpaceX, OpenAI and Anthropic. Critics warn the rush could distort the very markets these indexes are supposed to track — and question whether a few giant listings should be driving lasting changes to how benchmarks operate.