SpaceX is set to join both the Nasdaq-100 and Russell 1000 indices, leading to a significant influx of passive buying from index funds. This tremendous shift comes after a tumultuous period for SpaceX, wherein its stock experienced a sharp decline of 24% following its IPO. Analysts are wary of the ensuing volatility as billions in assets are realigned with the upcoming Russell rebalancing. Investors, especially those with 401(k) plans, may now find themselves holding SpaceX shares, regardless of their individual investment choices. As Wall Street braces for one of the busiest volume days of the year, the inclusion of SpaceX in major indices is anticipated to reshape trading dynamics and potentially escalate market volatility.