Based on reporting from MarketWatch, SpaceX is expected to join the Nasdaq-100 on Tuesday. That matters to business owners because index membership can influence how investors position capital—often with noticeable effects on day-to-day trading behavior.
MarketWatch also points out that SpaceX will not become part of the S&P 500 for at least another year. In practical terms, that means the company’s addition won’t be reflected in both of the major benchmarks at the same time, leaving room for continued differences in how each index responds to the same underlying business news.
The headline framing is also a useful reminder for operators managing pensions, corporate cash, or retirement plans: volatility tends to vary by benchmark. If one index is already known for wider swings than another, adding a high-profile name to only one of them can stretch that gap further—at least until the next major inclusion timeline.
For small and mid-sized businesses, the takeaway is less about predicting short-term moves and more about preparation. Review how your investment choices (or the fund options available to your plan participants) map to these benchmark changes, and ensure your risk assumptions still hold if market swings remain elevated longer than expected.
Source: MarketWatch
