Is a $7.5 trillion SpaceX IPO a crash warning?

What if the biggest stock market warning sign is not a recession, a war or interest rates, but a blockbuster IPO?

Reports that SpaceX could seek a valuation of about $7.5 trillion in what would be the biggest IPO in history have investors excited.

It is one of the most extraordinary companies ever built, spanning space exploration, satellite communications, defence and artificial intelligence.

But for investors, this story points to something more important, where we are in the market cycle right now.

One of Wall Street's oldest observations is that the biggest IPOs tend to arrive close to major market peaks. Not because the IPO causes a crash, but because deals of that size only happen when confidence is high and investors are willing to pay almost any price for future growth.

History offers some striking examples. The record-breaking AT&T listing came near the peak of the late 1990s boom before the dot-com crash.

Coinbase listed during the crypto surge of 2021, just months before digital assets fell sharply.

Rivian debuted at a valuation larger than many established carmakers shortly before growth stocks suffered one of their worst sell-offs in decades.

The pattern is not perfect, but it is worth paying attention to.

Companies do not rush to list when investors are fearful. They list when markets are strong, valuations are stretched and demand for risk is high.

Property investors have a similar saying. When the world's tallest skyscraper is announced, it often signals the peak of the property cycle.

Extreme optimism leads to extreme projects, and by the time they are delivered, much of the good news is already priced in.

Major market tops rarely form when investors are worried. They form when confidence is high and making money feels easy. That is why downturns catch so many people off guard.

Eventually, markets reach a point where optimism is fully reflected in prices and portfolios are surging. At that point, the question becomes simple, who is left to buy?

None of this means a SpaceX IPO would mark the exact top. Bull markets can continue rising long after early warning signs appear.

But a deal of this scale could be one of the clearest signals yet that the market is entering a late-cycle phase, where excitement starts to replace discipline.

What are the best and worst-performing sectors this week?   

The best performing sectors were Information Technology, up more than 7%, followed by Energy, up more than 2%, and Utilities, up more than 0.5%.

The worst performing sectors were Real Estate and Healthcare, both down more than 2%, followed by Communication Services, down more than 1%.

Among ASX 100 stocks, Pro Medicus led gains, up more than 20%, followed by Life360, up more than 12%, and WiseTech Global, up more than 11%.

The weakest performers included ResMed, Stockland and AMP, all down more than 7%.

What is next for the Australian sharemarket

The All Ordinaries Index posted a modest loss of 0.54% by Thursday's close, reversing the positive momentum from the previous week.

Materials dragged on the index, while a rebound in Technology and Energy provided some support in an otherwise subdued market.

Encouragingly, downward momentum appears to have eased. While it is still early, this technical shift suggests buyers are starting to reassert control.

If that continues, the market may again target the 9200 level.

This level has already triggered three reversals, making it a key resistance point.

However, repeated tests often weaken resistance over time. A fourth attempt typically increases the probability of a breakout.

Whether the market pauses at 9200 or breaks through quickly remains to be seen.

Either way, the expectation is that the All Ords could trade above this level in the second half of the year.

Even so, annual gains would remain modest. The index started the year around 9000 and has largely moved sideways through 2026.

For now, key support sits at 8800. More broadly, this remains a highly selective market.

While the index has been flat, certain sectors and stocks have delivered strong returns. That makes stock selection critical.

In conditions like these, where the index tells only part of the story, where the money is flowing matters far more than simply tracking the market.

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