S&P 500 closes at record as Broadcom-led chip rally follows softer jobs data

The S&P 500 rose 0.65% to close at a record 6,966.28 on Jan. 9, propelled by a broad advance in semiconductor shares and investor reaction to a softer-than-expected December jobs report. The rally capped a strong start to 2026 trading and reflected a mix of sector-specific corporate news, analyst upgrades and renewed expectations that the Federal Reserve may begin easing policy later in the year.

The Labor Department’s December report showed payroll additions slowed more than economists expected, even as the unemployment rate unexpectedly fell to 4.4%. That combination left markets interpreting the labor market as cooling without rapidly deteriorating, reducing near-term pressure on the Fed and helping to keep long-term yields subdued. Investors adjusted price discovery toward potential rate cuts rather than further tightening, supporting higher equity valuations.

Semiconductor names were the week’s dominant force. The PHLX Semiconductor Index climbed about 2.7% to a fresh record as chipmakers led gains across technology. Broadcom was the primary driver of the S&P’s record close, with shares up 3.8% to about $343.50 following quarterly results showing revenue of $18.02 billion, a 28.2% year-over-year increase, and AI-related semiconductor revenue of $6.2 billion, up 74% year-over-year. Broadcom also disclosed a new multi-year partnership to co-design custom AI accelerators, underscoring ongoing demand tied to artificial intelligence workloads.

Chip-equipment makers also benefited from the strength in semiconductors and positive analyst action. Lam Research jumped 8.7% to $218.36 after Mizuho raised its price target to $220 from $200, signaling growing confidence in capital expenditure among chipmakers. The combination of stronger AI-driven demand for specialized processors and rising equipment investment pushed both product and supplier valuations higher.

Other notable moves included Alphabet climbing about 1%, Tesla advancing roughly 2.1%, and Intel rallying nearly 11% after President Trump said he had a "great meeting" with Intel’s CEO Tan Lip-Bu. Power company Vistra surged 10.5% after securing a deal to supply electricity to data centers, a sign of how energy and utility plays are intersecting with the AI infrastructure build-out.

Market participants said investors were sorting through winners and losers within the broader technology and AI themes. Zachary Hill of Horizon Investments said investors were "getting granular and picking the winners and losers," reflecting a trend toward selective positioning rather than indiscriminate bets across the sector.

Valuation metrics showed the S&P 500 trading at roughly 22 times expected earnings, down from about 23 in November, as forward earnings estimates edged higher amid the sector rotation. Gains in industrials and materials, which had lagged in prior months, added breadth to the market advance and helped sustain the rally beyond megacap technology names.

Policy implications are nuanced. The payroll slowdown reduces the immediacy of Fed tightening, but the fall in unemployment complicates a straightforward case for early cuts. For markets, that has translated into a path-dependent view: central-bank guidance and incoming data will be decisive, but for now investors are banking on easier policy later in 2026 even as AI-led corporate spending lifts select areas of the market.