US stocks traded mixed on September 4, with the three major indexes diverging. As of publication, the S&P 500 edged down 0.12%, the Dow slipped 0.22%, and the Nasdaq was essentially flat, inching up 0.01%. The Philadelphia Semiconductor Index bucked the trend, surging 2.57% in a standout performance.

Semiconductor stocks rallied across the board: Super Micro Computer jumped over 7%, Intel rose more than 3%, and Nvidia posted modest gains. On the downside, EV leader Tesla tumbled over 6% after its Cybercab unveiling fell short of expectations, dragging on market sentiment. In consumer names, Lululemon plummeted over 17%, while UiPath sank nearly 16%.

Semiconductors Rally as Super Micro Surges Over 7%

As of publication, Super Micro Computer (SMCI) gained 7.16% to $40.58; Intel (INTC) rose 3.03% to $94.45; Nvidia (NVDA) added 0.81% to $230.30. The Philadelphia Semiconductor Index climbed 2.57%, emerging as the strongest segment of the session.

On the news front, Nvidia's $13 billion acquisition of AI platform Hugging Face has drawn analyst approval, viewed as a strategic move to defend its AI chip dominance. By backing the open-source model ecosystem, Nvidia can prevent competitors from eroding its market share with custom chips. Additionally, Nvidia previously reported second-quarter revenue of $96.22 billion, beating estimates, with data center revenue surging 117% year-over-year. The company guided for 70% revenue growth by 2028.

Cybercab Unveiling Disappoints; Tesla Slides Over 6%

As of publication, Tesla (TSLA) dropped 6.02% to $353.72 on heavy volume. The much-anticipated Cybercab event failed to meet Wall Street expectations, with analysts at Barclays, Wells Fargo and others expressing disappointment over the lack of pricing and launch details, maintaining Hold or Underweight ratings. JPMorgan expects the Robotaxi fleet to scale up gradually.

Meanwhile, NHTSA has opened an investigation into Tesla's practice of self-certifying vehicle safety standards, given the Cybercab's lack of manual controls. In China, Tesla's August sales rose 3.6% year-over-year but growth slowed, with market share declining amid intensifying competition.

Lululemon Plunges Over 17%; UiPath Slides Nearly 16%

As of publication, Lululemon (LULU) plummeted 17.48% to $100.49 on volume exceeding 30 million shares, making it one of the session's biggest decliners among well-known names. UiPath (PATH) fell 15.72% to $15.36.

Elsewhere, Chinese ADR Baidu (BIDU) rose over 3% after its Class A shares were included in the Hong Kong Stock Connect, effective September 7. Citi projects southbound net inflows could reach HK$47 billion in the coming months. On the macro front, US August non-farm payrolls added 162,000 jobs, beating expectations, fueling bets on a Fed rate hike in September. Trump openly pressured Fed Chair Warsh to cut rates, threatening to sever trade ties with surplus nations if rates are not lowered.