Everything You Need to Know About the SpaceX Trading Debut

Elon Musk’s SpaceX is set to make its stock-market debut Friday in the largest IPO ever—and perhaps the most closely watched. The company sold an outsized portion of the offering to individuals. Its performance on Friday will be a crucial gauge of investor appetite for mega-offerings from OpenAI and Anthropic expected later this year.

The rocket maker, which derives most of its revenue from its satellite internet unit and has a nascent artificial-intelligence business, will trade under the ticker “SPCX.” It sold 555.6 million shares at $135 each, raising about $75 billion in a deal that valued the company at roughly $1.77 trillion.

When will shares open for trading?

SpaceX executives are set to ring the Nasdaq’s opening bell in New York, but shares in buzzy initial public offerings don’t tend to start trading until later in the day.

Bankers leading an IPO typically want to match buyers and sellers for about 10% of the shares sold before opening trading to lessen volatility. For SpaceX, that would be about 55 million shares, or roughly $7.5 billion worth.

Because pre-IPO investors are restricted from selling shares for a while, it can take time to find willing sellers among those who bought shares in a high-demand IPO.

Shares of Alibaba , the largest U.S. IPO until SpaceX, opened for trading a little before noon in its 2014 offering. Last year, one of the highest-profile offerings was that of software maker Figma , whose shares started trading just before 2 p.m.

It is possible that SpaceX’s bankers will decide to start trading without matching the typical portion of orders to ensure the shares have several hours of trading on their first day, people familiar with the matter say.

How volatile will the stock be?

Bankers and traders expect SpaceX’s share price could be volatile in initial trading, thanks in part to the large portion of its shares expected to be held by individual investors. Some who anticipate individuals will rush into the shares worry they could just as easily get spooked and rush out.

Any sharp movement in stock price could trigger so-called circuit breakers that could pause trading. For most newly listed companies, a 10% swing in either direction prompts a five-minute pause. Companies that had their shares halted include Figma and Cerebras Systems , the chip company whose shares soared in its May debut.

These forced timeouts applied to single stocks came after the so-called flash crash in 2010, when the Dow Jones Industrial Average fell 700 points in eight minutes before recouping much of the loss.

What is all the talk about the ‘green-shoe’ option?

If the stock starts trading erratically, bankers have a secret weapon to attempt to calm things down.

Underwriters typically sell more shares to investors than an IPO’s total offer size, colloquially called the green shoe. In SpaceX’s case, they sold about 15% more shares than the stated offering size.

Because this means they technically allocated more than the offering amount, the so-called stabilisation agent, in this case, Morgan Stanley , needs to buy back the excess number of shares to deliver them. If the stock starts to fall, the bank will buy the shares in the open market, which helps buoy the stock price. If the stock isn’t faltering, the stabilisation agent can buy the additional shares they need to deliver to investors directly from the company.

The term “green shoe” comes from the first company to employ a version of this method years ago, a shoemaker that was a predecessor to Stride Rite. When Meta Platforms , then known as Facebook, went public in 2012, its shares started dropping and its bankers stepped in to buy more shares.

How will Elon Musk’s take-it-or-leave-it pricing fare?

Like all things Musk, SpaceX’s IPO bucked the norms. Instead of approaching prospective investors with a possible price range for shares ahead of the IPO and incorporating their feedback, the company set an exact share price from the beginning: $135.

The idea was to limit drama for what is already the biggest IPO of all time. It did, however, remove what many see as an important step along the way: price discovery. The success of this approach will partly be judged by how SpaceX’s shares trade Friday. If the stock surges, critics will say SpaceX left money on the table by not pricing shares higher. If the stock falls or trades flat, there will likely be critiques that SpaceX and its advisers overestimated demand.

Will the machinery hold up—and what will be the wider market impact?

The sheer size of SpaceX’s IPO will test the trading infrastructure at Nasdaq and could have ripple effects in the broader market.

Nasdaq has practiced with mock openings to make sure its trading platform is prepared. When Facebook went public, some investors who tried to change or cancel orders ahead of trading didn’t get confirmations because of a technology malfunction. The confusion contributed to Facebook shares dropping on the first day of trading. They didn’t return back above their IPO price for more than a year.

Meanwhile, some market watchers expect added activity Friday in stocks that individual investors might sell to buy SpaceX shares, such as those of technology companies and Musk’s electric-car maker Tesla . Such sales already appeared to be under way earlier in the week, when individual investors dumped single-stock holdings on a net basis for two days in a row, according to Vanda Research. (To be sure, those sales came on days that were poor showings for tech stocks broadly.)

It will take several days for SpaceX shares to show up in any major index funds , so the offering’s wider impact on the market could play out over the next several weeks or longer.

The Australian sharemarket rose during four of five sessions in the week ending 30 October, but the headline gain concealed a sharp divide between recovering miners, rate-sensitive property stocks and retailers hit by inflation and weaker trading updates.

The Australian sharemarket finished October with a positive week, although the route higher was anything but uniform.

The S&P/ASX 200 closed Friday 30 October at 8,908.1, gaining 112.9 points, or 1.28 per cent, from the previous Friday’s close of 8,795.2.

The All Ordinaries advanced 1.34 per cent to 9,025, while the more concentrated S&P/ASX 20 gained 1.11 per cent.

The benchmark rose during four of the week’s five sessions. It added 0.17 per cent on Monday and 0.46 per cent on Tuesday, before slipping 0.03 per cent on Wednesday. It recovered 0.50 per cent on Thursday and gained another 0.18 per cent on Friday.

The index briefly reached 8,933.3 but again failed to establish itself above the psychologically important 9,000-point mark.

The week’s central tension was between a resources recovery and a less forgiving domestic interest-rate outlook.

Materials gained 4.06 per cent, reclaiming part of the previous week’s heavy fall. Australian real estate investment trusts rose 3.77 per cent, financials gained 1.05 per cent and energy advanced 1.39 per cent.

At the other end of the market, consumer staples fell 5.13 per cent and consumer discretionary shares lost 2.35 per cent. Utilities declined 0.73 per cent and communication services eased 0.68 per cent.

Inflation changes the conversation

Australia’s September inflation data was the week’s pivotal domestic release.

Annual inflation of 4.3 per cent pushed market pricing towards another possible Reserve Bank increase and disrupted Wednesday’s early sharemarket rally.

By Thursday’s close, one widely followed market measure placed the probability of an increase in the cash rate to 4.85 per cent at approximately 80 per cent.

That pricing does not make an increase certain. It does, however, change the framework through which investors assess Australian businesses.

Companies dependent on discretionary household spending face renewed pressure on sales and margins. Property trusts, banks, developers and highly leveraged companies must be considered against the prospect of higher funding costs.

Banks present a more complicated equation. Higher rates can support margins, but they may also slow credit growth and increase arrears.

Miners recover

BHP gained 4.56 per cent across the week to close at $57.56, making a substantial contribution to the benchmark’s rise.

The recovery followed an 8.3 per cent fall during the previous week and helped lift the broader materials sector.

Northern Star Resources added 4.59 per cent, while Goodman Group advanced 6.85 per cent to become the strongest performer in the ASX 20.

The commodities picture was mixed. Gold fell approximately 3.12 per cent on the cited weekly measure, while Brent crude added around 0.68 per cent.

The Australian dollar was little changed at approximately US70.35 cents at the reference point.

Supermarkets and consumer shares retreat

The consumer-staples story was markedly weaker.

Coles fell 11.77 per cent after its first-quarter update, making it one of the largest significant-company declines of the week.

Woolworths lost 3.66 per cent and Wesfarmers fell 4.48 per cent to $76.69 as investors processed company trading commentary against the prospect of another squeeze on household demand.

The moves illustrate how quickly expectations can change when an apparently defensive company disappoints.

Supermarkets still benefit from the recurring need for groceries, but customers can trade down, shift between chains and reduce spending on higher-margin discretionary lines.

Wesfarmers carries exposure to several consumer categories through businesses including Bunnings, Kmart and Officeworks. A renewed rate increase would place more pressure on households already confronting higher prices.

The wider market’s biggest movements

Among companies outside the ASX 20, Mesoblast surged 27.32 per cent, SiteMinder gained 22.74 per cent and Zip rose 22.60 per cent.

The sharpest weekly falls included 4DMedical, down 33.51 per cent; Tuas, down 29.95 per cent; Catalyst Metals, down 17.47 per cent; and Champion Iron, down 13.35 per cent.

Those percentages require context.

The movements in BHP, Commonwealth Bank and other very large companies had substantially more influence on the index than similarly dramatic changes among smaller companies.

A 20 per cent move in a relatively small stock may attract more attention than a two per cent rise in a major bank, but the bank can have the greater effect on the market.

How the ASX 20 moved

The following list uses the S&P/ASX 20 constituents and five-session movements reported at the 30 October close.

Where the component feed did not publish a valid five-day comparison, no figure has been estimated.

BHP Group: Up 4.56 per cent

Commonwealth Bank: Up 1.66 per cent

Rio Tinto: Down 2.20 per cent

National Australia Bank: Up 0.48 per cent

Westpac: Up 0.08 per cent

ANZ Group: Up 1.92 per cent

CSL: Up 2.05 per cent

Macquarie Group: Up 2.19 per cent

Wesfarmers: Down 4.48 per cent

Woodside Energy: Up 1.43 per cent

Goodman Group: Up 6.85 per cent

Telstra: Five-day comparison unavailable from the cited component feed

Woolworths: Down 3.66 per cent

Fortescue: Five-day comparison unavailable from the cited component feed

Transurban: Down 2.40 per cent

QBE Insurance: Down 1.21 per cent

Aristocrat Leisure: Up 0.63 per cent

Northern Star Resources: Up 4.59 per cent

Sigma Healthcare: Down 0.36 per cent

Brambles: Down 1.20 per cent

The companies dominating the conversation

Coles was the week’s standout media-facing company for the wrong reason.

Its trading update produced an outsized repricing and drew attention across the grocery and retail sectors. Woolworths and Wesfarmers were also scrutinised as investors considered how stubborn inflation and another possible rate rise could affect sales volumes.

Bank of Queensland offered a more positive corporate signal.

The bank reported that its FY26 net interest margin had risen six basis points to 1.70 per cent, ahead of the 1.68 per cent expected by the market according to contemporaneous reporting.

Bank of Queensland shares rose 5.8 per cent on Thursday, while the major banks also rallied.

Endeavour Group finished Friday at $3.39, up 4.31 per cent on the day, and released the results of its annual general meeting.

The movement was notable during a week in which investors were highly sensitive to consumer-facing companies. The AGM result should not, however, be presented as the sole cause of the share-price increase without further supporting company guidance.

Mesoblast’s 23.4 per cent Thursday rise and 27.32 per cent weekly gain returned the biotechnology company to the centre of market attention.

For editors, it is important to separate the size of that percentage movement from its influence on the index. Mesoblast was an eye-catching performer, but it did not drive the ASX 200 in the way BHP or Commonwealth Bank did.

Qantas remained part of the broader market conversation as investors watched travel demand and company updates.

However, the primary-source review did not locate a fresh Qantas announcement that justified attributing a major weekly market movement to new company information. The airline should therefore remain on the monitoring list rather than being forced into the week’s causal narrative.

Is Australia’s IPO market reopening?

The official ASX new-listings pipeline remains active but selective.

ASX’s upcoming-floats page included formal applications with offer timetables extending through October and at least one anticipated listing on 30 November.

The exchange notes that its page covers companies for which a formal listing application has been received. It does not represent every company privately exploring a float.

The wider debate concerns whether Australia’s public market is sufficiently competitive when high-growth businesses can pursue capital in the United States or remain privately funded for longer.

ASX has previously raised possible reforms designed to improve the attractiveness of the local market. These include debate about reducing minimum free-float requirements and streamlining aspects of the admissions process.

An enhanced fast-track pathway for qualifying applicants can shorten the review process, reducing the execution risk created when market conditions change during a long IPO timetable.

That does not remove the more fundamental challenge.

New floats still require credible earnings or a convincing growth pathway, sensible pricing and enough genuine free float to support trading after listing.

Investors can already obtain diversified exposure through low-cost exchange-traded funds or buy established, liquid businesses. A float must therefore offer more than novelty.

The current pipeline suggests that the IPO window is open, but it is not indiscriminate.

What investors will watch next

The Reserve Bank’s next decision now sits at the centre of the domestic outlook.

Any change in cash-rate expectations will flow rapidly through banks, retailers, property trusts, listed developers and companies carrying substantial debt.

Investors will also watch whether the materials recovery can continue, whether BHP can hold its rebound and whether consumer companies provide further evidence of slowing demand.

Overseas, technology-sector volatility, commodity prices and the United States interest-rate outlook will continue to shape Australian trading.

The week’s 1.28 per cent headline gain was encouraging, but it was not a broad declaration of confidence.

It was a rotation towards miners, selected financials and property securities—and away from consumer businesses facing a more difficult inflation and interest-rate equation.

Market dashboard

S&P/ASX 200: 8,908.1, up 1.28 per cent for the week

All Ordinaries: 9,025, up 1.34 per cent

S&P/ASX 20: 5,214.7, up 1.11 per cent over five sessions

Best sector: Materials, up 4.06 per cent

Next-best sector: A-REITs, up 3.77 per cent

Weakest sector: Consumer staples, down 5.13 per cent

Major large-cap winner: Goodman Group, up 6.85 per cent

Major large-cap loser: Coles, down 11.77 per cent

AUD/USD: Approximately US70.35 cents at the weekly reference point

Gold: Approximately US$3,885 an ounce, down 3.12 per cent on the cited weekly measure

Brent crude: Approximately US$117.70 a barrel, up 0.68 per cent on the cited weekly measure