You can ignore AI giants like SpaceX, but your 401(k) won’t

SpaceX’s stock surged 19.2% on its Wall Street debut, valuing the company at $2.1 trillion—more than Exxon Mobil, Bank of America, and Coca-Cola combined. If it maintains this valuation, SpaceX could soon qualify for major stock indexes like the Nasdaq 100, a move that would automatically include it in funds tracking those indexes, such as Invesco’s QQQ ETF with $477 billion in assets. Nasdaq recently adjusted its rules to allow large companies to join the Nasdaq 100 index after just 15 trading days, a departure from its previous annual review process. This matters because many 401(k) investors rely on index funds, which mimic these benchmarks for lower-cost, passive investing. Over the past decade, only 21% of actively managed U.S. stock funds outperformed their average index peers, according to Morningstar, leading to a shift where index funds now hold more investor money than actively managed ones. SpaceX’s potential inclusion reflects broader changes in how private companies—like AI firms Anthropic and OpenAI, which could also reach $1 trillion valuations—gain rapid access to public indexes, bypassing traditional IPO timelines. Index funds track predefined market slices, such as the S&P 500 or Nasdaq 100, to measure overall market performance. Companies seek inclusion because it boosts demand for their stock, as seen when firms are added to indexes like the S&P 500. Over 1,000 index funds exist, with 185 tracking the S&P 500 alone, according to the Investment Company Institute. The Nasdaq 100’s rule change allows SpaceX to enter without waiting for the annual December reconstitution, potentially exposing QQQ holders to SpaceX shares without direct investment. The trend underscores how private funding—from pension funds, corporations, and wealthy investors—has propelled companies like SpaceX to massive valuations before public listings. This challenges traditional index inclusion criteria, as these firms grow faster than historical IPO timelines. If SpaceX and other AI companies qualify for indexes, it could reshape retirement portfolios tied to passive funds, reinforcing the dominance of index-based investing over active stock-picking strategies.