After its recent IPO, SpaceX is being integrated into major stock indexes like the Russell and potentially the Nasdaq-100, which is projected to trigger substantial passive investment. Approximately $2.68 billion in buying is anticipated from index-tracking funds due to the Russell index rebalance alone. This influx of capital positions SpaceX as a significant player in the market, with an opening fund weight in some Vanguard funds expected to be around 1% or less, increasing as more insider shares become available. This index inclusion is described as a "forced buying" event, where index funds must acquire SpaceX shares and, to maintain balance, proportionally sell off tiny amounts of other holdings.
Despite the expected passive buying, SpaceX has rapidly become a top short target on Wall Street. Short interest climbed to 13% of its public float, up from 8% in just one session, according to Ortex Technologies. This bearish sentiment follows a sharp drop of 31.5% from the stock's post-IPO peak of $225.64, with the stock closing at $154.54 on June 23, 2026. This makes SpaceX one of the fastest-growing short targets, with some analysts noting that this short interest is building remarkably fast for a company only public for a few weeks.
The company is also navigating its financial obligations, including a $25 billion bond offering that attracted nearly $85 billion in orders. These bonds carry coupons ranging from 5.35% to 6.65%, resulting in annual interest payments of $1.464 billion. The high valuation of approximately $2 trillion and the significant bond payments are contributing to the stock's volatility. The upcoming Russell inclusion on June 28 and potential Nasdaq-100 addition in early July are key dates analysts are watching, as they will dictate the next wave of passive buying and further impact the dynamic between long and short positions.
Analysts like Michael Monaghan of Founder ETFs observe a market trend favoring companies that benefit from AI spending while punishing those doing the spending, a dynamic exacerbated by SpaceX's substantial coupon bill. While the cost to short SpaceX remains low at about 1%, the rapid increase in bearish bets against the backdrop of forced index buying creates a unique clash. The inclusion mechanism means that investors in S&P 500 or Nasdaq-100 funds will automatically become SpaceX shareholders by selling fractional amounts of other companies, a mechanical process that traders closely monitor.
