SpaceX at MSCI World: What ETF Investors Need to Know

Accessed: June 29, 2026 • 6:01 am.

SpaceX shares will be added to the MSCI World Index today. This means that many ETF investors indirectly become SpaceX shareholders. What risks are associated with this – and what investors should pay attention to.

The hype surrounding SpaceX shares appears to be keeping many German private investors indifferent. At broker Flatex, shares of Elon Musk’s space and technology group were by far the most traded stock in Germany in the first five trading days, with 32,000 trades – ten times more trades than Nvidia and more than 30 times more than Tesla over the same period.

MSCI World is an important index for ETFs.

But in the future, many investors may also indirectly become SpaceX shareholders who want nothing to do with the hype. Today, index provider MSCI includes SpaceX shares in the MSCI World Index and the All Country World Index (ACWI).

ETFs for these indices are available from a variety of providers; They can be found in the portfolios of many German private investors – often in the form of an ETF savings plan. MSCI World was the benchmark index with the highest ETF trading turnover on Xetra last year, at €22.6 billion, according to Deutsche Börse.

Why ETFs Should Buy SpaceX

With SpaceX’s inclusion in MSCI World, large index funds such as the iShares Core MSCI World ETF must adapt their portfolios: they have to replicate the index and therefore also buy SpaceX shares.

This fuels demand for this right, which in turn leads to prices that are driven by artificial scarcity. The free float, that is, the share of SpaceX shares that are freely traded, is only four percent. Thus, the inclusion of an index may support the price, but may also increase exaggerations.

Why SpaceX is starting small at MSCI World

However, despite its trillion-dollar valuation, SpaceX won’t immediately become one of MSCI’s top stocks in the world. MSCI typically weights stocks based on their publicly traded market capitalization.

Christian Röhl, chief economist at Scalable Capital, initially estimates SpaceX’s stake in MSCI World to be around 0.1 percent. The “hysteria” that SpaceX will immediately become a heavyweight in global indices and that ETF investors will therefore have to take on this mega-IPO is “exaggerated,” Röhl emphasizes in an interview ARD Financial Editorial.

An example calculation shows that even significant price losses for SpaceX are unlikely to move the index: if SpaceX fell by approximately ten percent, it would mathematically result in a decline of only 0.01 percent in the MSCI World Index, with a weight of 0.1 percent.

New Nasdaq 100 rules make inclusion easier

MSCI World isn’t the only index that will quickly gobble up SpaceX. SpaceX is expected to join the Nasdaq 100 index on July 6, significantly earlier than was possible until recently. Nasdaq changed its rules before the IPO and reduced the “fast entry” time from several months to 15 trading days.

At the same time, shares with a low free float (below 33.3 percent) now weigh three times more than the float. Many market experts are critical of this, including Christian Maschner of the family office FINVIA, which advises wealthy private clients and entrepreneurial families. “What has made us a little angry is the fact that some index providers actually have a sort of ‘Lex SpaceX’ – just so that stocks can get into indexes and therefore into ETFs even faster.”

Why SpaceX is not included in the S&P 500 index

But there are also examples to the contrary: S&P Dow Jones Indices deliberately decided not to change its strict rules for mega-IPOs in the lead-up to SpaceX’s IPO.

Admission criteria include at least ten percent free float and profitability, that is, profit for the last quarter and for the last four quarters. In addition, the share must have been traded on an approved stock exchange for at least twelve months. None of this applies to SpaceX, which posted a net loss of $4.3 billion in the first quarter of 2026 alone.

Thus, the space company is currently excluded from the S&P 500 index. This may seem familiar to his boss Elon Musk: “It took Tesla almost ten years to get into the S&P 500 index,” emphasizes FINVIA expert Maschner.

SpaceX shares fluctuate wildly

SpaceX’s rapid inclusion in MSCI World and the Nasdaq 100 directly exposes ETF investors to the risks associated with high-value mega-IPOs. For many passive investors, an inflated individual stock suddenly becomes a building block in retirement planning.

High price swings are common for SpaceX: Since its high-profile start to trading on June 12, shares rose 67 percent at their peak before falling 35 percent. Due to the low free float, each larger order – whether buy or sell – moves the price disproportionately.

Insider sale could become a burden for SpaceX

Insider selling could put further pressure on the stock in the coming months. While most new public companies limit insider selling for about six months after listing, SpaceX has created exceptions. According to market experts, insiders could potentially sell up to 44 percent of SpaceX shares by early September.

This also has implications for ETF investors: “The free float will then of course increase – and with it, other things being equal, the share of SpaceX in the indexes,” emphasizes Röhl, chief economist at Scalable.

Cluster risk remains in MSCI World

The bottom line is that the good news for passive investors remains: SpaceX stock won’t immediately become a heavyweight in either the MSCI World or the Nasdaq 100. But that could change over time.

At the same time, cluster risk in MSCI World is enormous even without SpaceX: US companies now make up almost 75 percent of the index. Only the Magnificent Seven, i.e. Apple, Microsoft, Amazon, Alphabet, Meta, Tesla and Nvidia, have a combined weight of more than 24 percent.

Now is a good time for retail investors to take a closer look: What index underlies their own ETF savings plan, and what index rules apply? The SpaceX case shows how strictly they decide which stocks automatically end up indirectly in many portfolios.