Weekly Market Commentary: October 19 – 23, 2026

Oil Hit a Six-Month High, Tech Stumbled, and the Dow Still Finished Higher

Markets delivered a split verdict this week. The Dow Jones Industrial Average gained 0.4% for its third straight weekly advance, while the S&P 500 slipped 0.5% and the Nasdaq Composite fell 0.7%, each posting a second consecutive weekly decline. Beneath those modest weekly numbers, we observed two powerful crosscurrents: a sharp rise in oil prices and renewed questions about the cost of the artificial intelligence (AI) build-out.

What We Observed This Week

• On Thursday, the Nasdaq fell 2.6%, its worst session since early June, as several large technology companies reported quarterly results. Even where revenue beat expectations, investors focused on the scale of capital required for AI infrastructure and on how long the payoff may take. Meta Platforms, for example, fell roughly 7% that day despite stronger-than-expected revenue.
• Investors moved toward safety. The 10-year Treasury yield fell 17 basis points on Thursday, closing below 5% for the first time in a month, before finishing Friday near 5.00%.
• Brent crude, the international oil benchmark, settled at $116.72 a barrel on Friday. That was up 6.2% for the week and its highest settlement since April 29, driven by Houthi attacks on Saudi energy infrastructure and expectations of renewed U.S. strikes on Iran.
• The labor market still looks steady. Initial jobless claims fell to 194,000 for the week ended October 17, near the lowest levels in more than five decades.
• Households remain uneasy. The University of Michigan’s final October consumer sentiment index came in at 48.0, near the bottom of its history, while year-ahead inflation expectations rose to 4.7%.

What We Are Watching

• The Federal Open Market Committee (FOMC) meets October 27-28. After September’s quarter-point hike to a 3.75%-4.00% range, futures markets on Friday priced roughly a one-in-ten chance of another increase next week, according to CME Group’s FedWatch tool, while a December hike was priced near 71%.
• Energy prices. Oil feeds directly into gasoline and transportation costs, and September’s Consumer Price Index (CPI) already showed annual inflation of 3.7%, with gasoline accounting for more than half of the monthly increase.
• Whether long-term Treasury yields hold near 5% or resume their climb.
• The midterm elections on November 3 and the October CPI release on November 10.

The Long-Term Takeaway

Weeks like this one are a reminder that market leadership rotates. The same week that tested technology shares rewarded energy companies and smaller businesses, with the Russell 2000 index of small-company stocks gaining 2%. A portfolio built around a single theme can feel very different from the broad market for long stretches, in both directions. We believe diversification across sectors, company sizes and asset classes, paired with a plan that expects volatility rather than reacts to it, remains more dependable than trying to predict which headline will move markets next.

This content is for educational purposes only and does not constitute personalized investment advice or a recommendation to buy or sell any security. The information provided reflects general market commentary based on publicly available information and is not tailored to the financial situation of any individual. Investing involves risk, including the possible loss of principal. Past market performance is not indicative of future results. Guardant Wealth Advisors, LLC is a registered investment adviser. Registration does not imply a certain level of skill or training.