US stocks rebound as AI shares recover, Supreme Court tariff skepticism

US equities advanced on Wednesday, led by a significant rebound in artificial intelligence and semiconductor stocks, with the Nasdaq Composite gaining 1.1% as companies like AMD, Broadcom, and Micron recovered from recent declines. Market sentiment was further bolstered by the Supreme Court's apparent skepticism regarding the legality of Trump-era tariffs, which boosted trade-sensitive stocks and the Russell 2000. Stronger-than-expected economic data, including the ADP employment report and ISM services index, also contributed to the positive momentum, although robust data led to a rise in Treasury yields.

Analysis

US equities advanced on Wednesday, with the Nasdaq Composite leading gains at 1.1%, driven primarily by a significant rebound in artificial intelligence and semiconductor stocks. This recovery, spearheaded by Advanced Micro Devices (AMD) which rose 3% after exceeding earnings expectations, saw Broadcom and Micron Technology surge 2% and 8% respectively, reversing previous session losses. The broader AI segment, including Nvidia and Oracle, also recovered, despite some valuation concerns that led to Tuesday's sell-off.

Investor sentiment was further bolstered by the Supreme Court's apparent skepticism regarding the legality of President Trump's emergency tariffs, which reduced implied odds of their upholding in prediction markets. This development positively impacted trade-sensitive companies, with Ford and General Motors each rising 3% and Caterpillar gaining 4%. Consequently, the Russell 2000, representing small-cap stocks more exposed to domestic conditions and trade, outperformed with a 1.5% advance.

Stronger-than-expected economic data, including the ADP employment report and ISM services index, signaled resilience in hiring and business activity, contributing to market optimism. However, this robust data also led to a rise in Treasury yields, tempering expectations for a December Federal Reserve rate cut. Corporate earnings presented a mixed picture, with Unity Software (+14%), Allegiant Travel (+21%), and Rivian (+23%) reporting strong results and positive outlooks, while Perrigo (-22%), Super Micro Devices (-9%), and Arista Networks (-7%) faced declines due to disappointing figures.

Key Decisions for Investors

• Investors should closely monitor the sustainability of the AI and semiconductor sector's rebound, particularly given ongoing valuation concerns and divergent individual company performance
• Consider increasing exposure to trade-sensitive sectors and small-cap stocks, as the Supreme Court's tariff skepticism could signal a more favorable trade policy environment
• Pay close attention to upcoming economic data releases and Federal Reserve communications, as strong economic indicators may continue to pressure Treasury yields and influence interest rate cut expectations