FTSE Russell changed rules to make it easier for newly public megacaps to enter its U.S. indexes, particularly benefiting SpaceX ahead of its anticipated IPO. The move opens quick access for passive investors to high-profile listings, signaling index providers are adapting to faster market cycles.

Large companies can now enter Russell indexes after just five days of trading if their public share value exceeds index cutoffs. Previously, companies faced a mandatory wait until the next annual review. The changes took effect immediately, reflecting pressure from asset managers demanding quicker inclusion of major listings.

The rule change creates immediate liquidity for new megacaps while potentially boosting index fund flows. Similar moves by other index providers indicate a competitive scramble to capture the explosive growth expected when SpaceX goes public, likely setting a new standard for future blockbuster IPOs.