Philadelphia Semiconductor Index falls 2% as Broadcom’s forecast weighs on chipmakers

Broadcom just delivered the kind of earnings report that would make most companies pop champagne. Record revenue, massive year-over-year growth, and a reaffirmed long-term target that reads like science fiction. Instead, the stock cratered nearly 13-15% on June 4, dragging the entire semiconductor sector down with it.

The Philadelphia Semiconductor Index, better known as the SOX, closed down roughly 2% after plunging as much as 6.3% intraday. For an index that had surged nearly 6% in the days prior on pure AI enthusiasm, it was a swift and humbling reversal.

Record numbers, wrong kind of reaction

Broadcom’s fiscal Q2 2026 results were, by any normal standard, spectacular. Revenue hit $22.2 billion, a 48% increase year-over-year. That’s a record quarter for the company.

But the forward-looking guidance told a different story. Broadcom projected AI chip revenue of approximately $16 billion for the upcoming quarter. Wall Street’s consensus estimate sat at roughly $17.2 billion. That $1.2 billion gap, representing about a 7% miss on expectations, was enough to send the stock into freefall.

The decline marked Broadcom’s largest single-day drop since early 2025. And because Broadcom has become one of the bellwethers for AI infrastructure spending, the pain radiated outward across the entire chip sector.

Broadcom reiterated its $100 billion AI revenue target for fiscal 2027 rather than raising it. In a market that had been pricing in continuous upside surprises, simply holding steady on guidance felt like a downgrade.

A sector stretched thin

Before Broadcom’s earnings release, the SOX had been on an absolute tear. The index was up roughly 96.5% year-to-date heading into the announcement, fueled by relentless optimism about AI infrastructure buildouts and enterprise adoption.

Options market activity indicated a willingness among traders to buy on weakness, treating the pullback as a profit-taking event rather than a signal that something fundamental has changed about AI demand.

The Dow Jones Industrial Average actually hit new highs on the same day chip stocks were bleeding, reflecting sector rotation with capital flowing out of the most richly valued corners of tech and into other parts of the market.

What this means for investors

Analysts are already flagging the possibility that shares in companies like Broadcom may “pause for the next couple of quarters” as the market digests the gap between current performance and sky-high expectations. The long-term outlook into 2027 remains constructive.

Revenue grew 48% year-over-year. The company is executing on its AI strategy. The $100 billion fiscal 2027 target, while unchanged, is still an enormous number.

The SOX recovering from a 6.3% intraday loss to close down only 2% means there is a large cohort of new buyers who are now underwater if the selling continues.

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