Catenaa, Wednesday, March 18, 2026- S&P Dow Jones Indices, Nasdaq, and FTSE Russell are all mulling changes that would accelerate how newly listed companies enter their flagship benchmarks, a near-simultaneous rethink rarely seen before.

Bloomberg News reported that more than $30 trillion in assets is benchmarked to the indexes whose rules are under consideration, and the decisions these providers make will determine how a large amount of wealth is redistributed as it moves from private hands to public markets.

Patrick Healy helped push Nasdaq to revise its index methodology more than a decade ago as part of a deal to win Facebook’s listing.

Now, as index providers again consider accelerating entry rules, the founder of Issuer Network says the industry risks going too far, too fast.

Nasdaq’s proposed “fast entry” rule would cut the Nasdaq 100’s requirement from at least three months to just 15 trading days, a timeline Healy says would expose index-tracking funds to the outsized price swings that freshly minted stocks typically experience.

“Anything shorter than 30 days is unnecessarily risky,” Healy, whose firm advises C-suite executives on IPOs, told Bloomberg. “To please, they’re being too aggressive.”

The indexes are the backbone of low-cost investment vehicles that give ordinary investors easy access to companies that define the economy.

Moreover, index methodology has never been static. The S&P 500, for instance, shifted to float-adjusted weighting in 2005 and has periodically updated its market-cap thresholds.

Proponents of faster inclusion say the rulebook has always evolved alongside the market it tracks.

If the 10 largest US venture-backed companies were to list and join the S&P 500, they would collectively represent roughly 4.5% of the index, more than the entire energy sector, according to S&P’s own analysis.

SpaceX alone, targeting a valuation of about $1.75 trillion, would arrive larger than all but five current members.