U.S. equities remained broadly higher on Tuesday, September 22, as investors assessed whether the strong technology-led rally from the previous session could extend while several macroeconomic risks remained unresolved. The Nasdaq gained 0.44% to 27,242.25, while the S&P 500 rose 0.19% to 7,779.09, keeping both benchmarks close to historically elevated levels as markets focused on interest rates, oil and upcoming geopolitical talks.

Technology Continues to Anchor the Market

The technology sector remains an important driver of U.S. equity sentiment after the Nasdaq reached a record close on Monday. The previous session saw a sharp revival in AI-related enthusiasm, led by Meta and semiconductor stocks, with Advanced Micro Devices becoming the latest chipmaker to reach a $1 trillion market valuation. The semiconductor rally helped reinforce expectations that AI infrastructure spending remains a significant source of corporate growth.

Tuesday’s market action was more measured. Nasdaq futures were little changed before the opening, while Nvidia eased 0.1% and U.S.-listed shares of TSMC and SK Hynix fell around 1%. At the same time, Meta declined 0.5% in premarket trading after its 11.3% advance on Monday, while Alphabet, Amazon and Microsoft posted modest gains. The mixed technology performance indicates that investors are reassessing valuations after the latest AI-driven advance rather than moving uniformly into the sector.

Market Breadth Extends Beyond the Nasdaq

The session also showed evidence of participation outside the largest technology companies. The Russell 2000 gained 0.52% to 2,875.36, outperforming the S&P 500 and Nasdaq on the day. The index’s performance is notable because smaller companies can be particularly sensitive to domestic economic conditions and financing costs, making its advance a useful counterpoint to the technology-led gains dominating recent market headlines.

Canada’s S&P/TSX Composite index also rose 0.51% to 36,192.05, while the Dow 30 gained 0.14% to 52,123.87. In Brazil, however, the IBOVESPA fell 0.66% to 185,358.16. The divergence reflects the different exposures of major markets to commodities, domestic growth, technology and currency conditions. The U.S. Dollar Index was little changed, gaining 0.06% to 100.49.

Oil and Interest Rates Remain Key Risks

The broader market backdrop remains complicated by energy prices and monetary policy. Brent crude fell 1.6% Tuesday but remained close to $100 a barrel, while the 10-year U.S. Treasury yield stood at approximately 4.9%. Both variables have recently played an important role in determining equity valuations, particularly as higher oil prices can reinforce inflation while elevated bond yields increase the financing and discount-rate pressures facing companies.

Markets are also reassessing the Federal Reserve’s next move. Traders currently see a 50.9% probability of another rate increase in October, according to CME FedWatch, following the Fed’s rate increase this month. Several Fed officials, including Vice Chair Philip Jefferson, New York Fed President John Williams and Richmond Fed President Thomas Barkin, are scheduled to speak, potentially providing further signals about the central bank’s policy path.

Geopolitics Could Set the Next Market Direction

Investors are simultaneously watching potential U.S.-Iran discussions at the United Nations General Assembly and a planned U.S.-China summit later this week. Any progress on the Middle East conflict could reduce the geopolitical premium embedded in oil prices, while greater clarity around U.S.-China trade relations could influence technology and semiconductor sentiment. Reuters reported that Iran has indicated it could reopen the Strait of Hormuz within seven days if U.S. pressure is eased, while Saudi Arabia has restarted operations at its East-West Pipeline.

Going forward, the market will be watching whether the Nasdaq can consolidate its record levels while gains broaden across smaller companies and other sectors. The key variables remain AI earnings expectations, Treasury yields, oil prices, Fed guidance and U.S.-China and U.S.-Iran developments. A sustained moderation in energy prices and bond yields could support broader equity participation, while renewed inflation pressure or geopolitical escalation could quickly challenge the market’s current resilience.