Goldman: SpaceX's rising index weight barely shifts benchmark valuations

what happened

According to Seeking Alpha, citing Goldman Sachs strategist Ben Snider, SpaceX's expanding role in large U.S. equity benchmarks has done little to change their valuations or performance, despite investor worries before its record IPO. About a third of the company's stock now trades publicly, compared with 5% at the listing, a shift described in a November 6 report. That has raised its weight in several indexes and increased holdings by funds that track them.

In the Nasdaq-100, where SpaceX accounts for roughly 2.5% of the index, Goldman found only minor changes in valuation, volatility and concentration. The index trades at 19.5 times expected earnings over the next year, versus 19.2 times without the stock. At the end of October, passive ETFs held about $30 billion of SpaceX shares, roughly $20 billion of it in Nasdaq-100 trackers.

The bank expects the share of tradable stock to approach half by mid-2027 as lockups expire, and scheduled rebalancing could add demand along the way. Goldman estimates that rebalancing the Russell 1000 Growth at its next date, December 11, could prompt more than $10 billion of passive ETF buying. S&P 500 inclusion may come in the second half of 2027, once the company meets the profitability rules, or through a merger with an existing member.

why it matters

For index-tracking investors, the report suggests SpaceX's growing weight is not altering the basic profile of their portfolios. Near term, the pace of float increases and the timing of rebalances are the factors to watch for fund flows.

market impact

SpaceX and index funds: scheduled rebalancing could support demand for the stock

• ▲SpaceX shares pressure up — scheduled index rebalancing could trigger large passive purchases

instruments

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