Market pulse
Investor sentiment began the week on firmer ground as a strong reception for Meta's newly released AI assistant Muse and easing crude oil prices combined to buoy equities. Meta's shares jumped by more than 11% on Monday on demand for the new agent, a lift that rippled through the broader AI-focused group of stocks. Global chip equities extended gains, and US chipmaker Advanced Micro Devices rallied nearly 10%, joining other semiconductor firms that have attained trillion-dollar valuations as enthusiasm around AI re-accelerated.
AI-driven rally and chip momentum
The release of Muse appears to have renewed optimism among technology investors after weeks of concern over the long-term risks associated with artificial intelligence. The rebound pushed the Nasdaq to record highs as chip-related names also outperformed. The SOX chip sector index climbed more than 4% on Monday, and data from South Korea showed exports during the first 20 days of September rose 78.3% year-on-year to $71.4 billion, a 20-day record, with semiconductor shipments reported up 259.4% for that period. Those shipment figures added to the bullish tone for chip stocks.
Within that move, AMD rose by roughly 9.95% on Monday to become the latest chipmaker to reach a $1 trillion market valuation. Investors treated the episode as a fresh leg higher for AI-related equities, reversing some of the hand-wringing that had weighed on the sector in recent weeks.
Crude and geopolitics
At the same time, crude prices retreated, with Brent slipping below $100 per barrel on Tuesday. The drop followed a Kyodo News report saying Iran had offered to reopen the Strait of Hormuz within seven days if the United States took initial steps to ease military pressure, a development that immediately eased concerns about oil supply disruptions. Sources also indicated Saudi Arabia had restarted operations at its East-West Pipeline, adding to the downward pressure on prices.
Geopolitical developments remain front and center. Thursday's scheduled meeting between President Trump and Chinese President Xi Jinping is expected to address AI risks, and discussions may also cover the possibility of an extension to any trade truce and geopolitical hot spots such as Taiwan and the Iran war. A flurry of leader-level meetings coinciding with the UN General Assembly this week could produce unexpected diplomatic moves, including a potential meeting between Trump and Iranian President Masoud Pezeshkian, according to Trump.
Separately, in another high-profile pairing ahead of the UN gatherings, Trump pressed Ukrainian President Volodymyr Zelenskiy to stop strikes on Russian oil refineries. The outreach did not appear to be accompanied by parallel demands that Russia cease attacks on Ukraine's energy infrastructure. The two leaders are also scheduled to meet in New York this week.
Debt market strains in Europe
Across fixed income markets, tensions resurfaced around French sovereign debt. French yields underperformed as doubts grew about a potential budget agreement ahead of next year’s presidential election, pushing France's 10-year borrowing premium over Germany above 100 basis points over the past week for the first time in more than a decade. Credit default swap costs on French government debt rose to their highest level in six years, highlighting investor concerns about fiscal trajectories and political risk.
Federal Reserve commentary
On Wall Street, Federal Reserve officials continued to deliver hawkish messaging. Chicago Fed President Austan Goolsbee was the latest to highlight that services-sector inflation and demand-driven price pressures remain as significant a challenge as elevated energy costs. The remarks maintained a tone of vigilance among market participants weighing monetary policy risks alongside the week's geopolitical developments.
Chart of the day and data points
Advanced Micro Devices' near 10% gain on Monday marked the most recent example of a chip stock climbing to a trillion-dollar market valuation amid renewed AI optimism. The SOX index's advance and the South Korean export surge in early September supported the narrative of strong semiconductor demand, underscoring why investor focus has shifted back toward technology and semiconductor names.
Events to watch
- UN General Assembly opening in New York
- US 2-year note auction at 1 p.m. EDT
- Speeches by New York Fed President John Williams, Richmond Fed President Thomas Barkin, and Fed Vice Chair Philip Jefferson
- Japanese financial markets closed for a holiday, returning on Thursday
What to read and listen to next
Readers are invited to consult a columnist's recent piece on how a less data-driven Federal Reserve could operate under a different leadership scenario, and to tune into the Morning Bid daily podcast episode that covers the latest AI stock rally. The podcast and newsletter provide additional market context and commentary from financial journalists.
Opinions expressed in this article reflect the author's analysis and do not represent institutional endorsement. The author focuses on pricing power, input-cost pass-through, distribution strength, and management discipline when assessing market moves.