Richard Hills
Liquidity Matters Episode 16:
SpaceX: Why IPOs Matter
The SpaceX IPO generated over $170 billion value traded in the company’s shares in a single session on 12 June - over double the value of the capital raised by the company. This was 34% more than the entire MAG 7 daily average combined over the last three and a half years ($127 billion) and 1.9x the daily average for the entire European equity market ($92 billion) for the same period. It beat the previous record for a single stock set by NVIDIA on 28 May 2024 ($147 billion), which was driven by significant outperformance on Q1 earnings expectations. SpaceX beat that by 16.1% on a float of just 5% of total company value.
After 5 trading days, SpaceX ADVT had fallen below $30 billion, reaching a low of $9.5 billion on 25 June.
This story is relevant to portfolio managers and traders alike. There are short and long term impacts on liquidity across the market which will affect both passive and active investment performance and total expense ratios over the coming months.
Figure 1 shows the magnitude of the volumes generated by the SpaceX IPO over the first two weeks of trading, within the context of the broader US and European Equity market’s most liquid names. Average Daily Value Traded (ADVT) jumped 32% across the categories shown versus YTD up to IPO day. It is striking that the market share for the MAG7 in the over the period fell by over 17% from its baseline YTD figure after the IPO, a sign of the volatility which has accompanied the SpaceX launch.
Source: xyt Market Intelligence
MAG 7 becomes MAG 8
SpaceX generated $75 billion for only 5% of the total shares. It was the largest IPO on record, surpassing Saudi Aramco’s 2019 debut. How does such a huge capital raising impact equity market liquidity ?
One component comes from strategic re-allocation from other asset classes such as bonds or other regions, which can be considered inflows to equity and the US market in particular. It’s early days, but notice from the pie chart how European market share fell by 18% during the period, versus YTD for the scope of stocks presented. A second component comes from tactical re-allocation of investment capital from other equities.
We can infer the former from the long term uplift of ADVT in equities. Tactical allocation within the asset class means higher variation in liquidity over the short to medium term as indexes change. SpaceX shares will join the Nasdaq-100 index in early July (although not the S&P 500 until profitability targets are achieved). Passive investors must inevitably sell some of their holdings in the MAG 7 to accommodate decreased weightings, while active investors won’t escape - they have asset allocation limitations, and information ratios to preserve. It means a period of adjustment, with favoured names and portfolio stalwarts being sold off simultaneously, resulting in directional competition for liquidity.
Nvidia and Tesla Daily Trading
Figure 2 shows the long term ADVT trend for NVDA and TSLA through daily data and the 20 day moving average. TSLA has continued a sharply downward trend which accelerated after the SpaceX IPO. NVDA’s upward trend slowed but didn’t reverse. This could point to some early concentration concerns should Tesla and SpaceX come together. At the sector level, SpaceX carries further complexity with its diversified corporate strategy pointing at AI as well as Space hardware and technology.
Market mechanics meet market dynamics
The structural consequence of such an event is reflected through index reconstitution, starting in a matter of days with admission notices for SPCX already issued by FTSE Russell. Nasdaq revised its rules, effective 1 May 2026 to allow newly listed companies ranking in the top 40 by market cap to join the Nasdaq-100 after just 15 trading days. SpaceX will join effective 7 July. Every passive fund must trim existing constituents to fund the new position, regardless of valuation. These are examples of repercussions that will drive large spikes in liquidity - demand for SPCX and selling pressure for competition.
This is the key point for trading desks: passive managers are compelled to trade, competing for liquidity in names that are simultaneously being sold by others running the same mandate. Active managers face a related challenge; falling prices in well-performing strategic stocks may temporarily distort performance and reduce sharpe ratios, leaving them with the conundrum of a forced rebalancing or risking tracking error to their chosen benchmark while waiting for calmer waters. Meanwhile the daily humdrum operation of the market such as investing cash for pensions must navigate choppier seas.
The S&P 500 is a different story. SpaceX posted a $4.94 billion net loss in 2025 and does not meet the GAAP profitability requirement; inclusion is not possible before mid-2027 at the earliest. Tesla entered the S&P 500 in December 2020 at a 1.7% weighting, which was the largest single addition in the index's history, generating tens of billions of rebalancing flows from direct index trackers alone, compressed into a matter of days.
Why this IPO matters
Expected trading cost for ‘business as usual’ investment activity does not stay constant through events like this as Figure 2 shows. Volume profiles shift with shocks lasting for weeks. Participation schedules built on historical averages (often 20 days moving average) must be regularly recalibrated, and aggregate market impact rises during competition for liquidity. Pre-trade models that do not account for expected temporary distortions in volatility or liquidity may underestimate (or overestimate) the cost of trading. This is when market dynamics and market mechanics collide. As we have highlighted before in Liquidity Matters (such as Nvidia’s Q1 earnings statements), significant corporate events in heavily weighted names affect fellow listings in sectors and indexes, emphasizing the need for flexibility in decision support and trading models.
