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Tech Wreck Rattles Wall Street as Nasdaq Plunges 4.6 Per Cent

A brutal sell-off in global technology and AI stocks is testing the thesis that mega-cap tech can sustain sky-high valuations indefinitely, with Australian super funds and local tech investors caught in the crossfire.

By Sydney Markets Desk · Published 29 June 2026, 11:13 pm

3 min read

The numbers were hard to ignore. The Nasdaq Composite slumped 4.60 per cent overnight, its sharpest single-session fall in months, dragging the broader S&P 500 down 1.95 per cent to 7,354. The carnage was concentrated in the artificial intelligence and semiconductor darlings that had, until recently, powered much of Wall Street's extraordinary post-pandemic recovery. For Australian investors, many of whom hold meaningful exposure to global tech through their superannuation funds, the session was a sobering reminder of just how much risk has been quietly accumulating in their retirement portfolios.

The local market held its nerve with characteristic restraint. The ASX 200 edged fractionally higher to 8,823, a gain of 0.08 per cent, while the broader All Ordinaries slipped marginally. Sydney's market, less exposed to the pure-play AI names that drove the Nasdaq's surge and subsequent stumble, offered something of a natural hedge. But that insulation is only partial. AustralianSuper and Aware Super, the nation's two largest funds, hold substantial allocations to global equities, and their members will feel the offshore turbulence when unit prices are next struck.

When the AI Premium Deflates

The sell-off reflects a growing anxiety among institutional investors about whether the earnings growth being demanded to justify elevated valuations in AI-linked stocks is actually materialising at the pace the market priced in. South Korea's announcement of an $880 billion chip and AI investment plan, while bullish for the sector's long-term architecture, serves as a reminder that competition is intensifying and that the moats protecting today's dominant players may be narrower than the share prices implied. Ford's reported decision to rehire human engineers after AI failed to match quality benchmarks added further texture to the narrative that AI's commercial deployment remains uneven.

Gold's sharp rise to $US4,063 per ounce, a gain of 1.82 per cent, tells a concurrent story. When investors retreat from growth and risk, they reach for the oldest store of value available. Bitcoin held relatively firm at $US60,014, a modest 0.49 per cent gain that suggests crypto is behaving neither as a risk asset nor a genuine safe haven on this occasion, but rather trading sideways as capital seeks more established shelter.

The Australian dollar was a notable casualty, falling 1.39 per cent to 68.98 US cents. A weaker currency softens the blow for local investors holding unhedged global equity positions, since offshore assets are worth more in Australian dollar terms when converted back. But it also raises import costs and complicates the Reserve Bank's inflation calculus, a dynamic the central bank will be watching closely as it weighs any further adjustments to the cash rate.

For Sydney-based fund managers and self-managed super trustees, the episode underscores the importance of scrutinising how much technology concentration has crept into what were once diversified global equity mandates. The AI trade is not over, most market participants would argue, but the days of pricing in perfection appear, at least for now, to be behind us.

This article was compiled by AI from the sources linked above and screened before publishing. See our editorial standards.

Topic:#Finance

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Published by The Daily Sydney

This article was produced by the The Daily Sydney editorial desk and covers finance in Sydney. See our editorial standards for how we use AI.

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