Monthly Market Update — September 2026

By Costa S. Tzotzis

September was a reset month. The Federal Reserve raised rates for the first time in three years, the 10-Year Treasury crossed 5%, and investors had to recalibrate what that means for their portfolios going forward.

September 2026 — Month in Review

September 1st – 30th, 2026

MarketCloseChange
S&P 50007,651.54▼ -0.45%
Dow50906.05▼ -4.29%
Nasdaq26,861.06▲ +1.86%
Gold$4,186.70▼ -6.58%
WTI Oil$90.42▲ +5.43%
10Y Treasury5.290%▲ +0.532
VIX16.34▲ +9.52

What Happened in September

September was a tale of two markets. The Nasdaq held up, finishing the month with a modest gain of 1.86%. But the Dow had a rough go of it, falling more than 4%, and the S&P 500 slipped slightly into the red. The divergence tells you something: investors stayed interested in growth and technology while pulling back from more rate-sensitive, value-oriented areas of the market.

The defining event of the month was the Federal Reserve’s decision to raise interest rates by 25 basis points on September 16 — the first rate hike in three years. The Fed’s message was direct: inflation remains elevated, and returning to 2% is the priority. The 10-Year Treasury yield responded, climbing to 5.29% by month-end, a level that puts real pressure on borrowing costs across the economy.

Oil was volatile but finished higher, up 5.4% on the month. The Iran conflict continued to push energy prices around, and with gasoline and diesel driving a significant share of the inflation readings we saw in August, the Fed had little choice but to act. Gold moved lower, down 6.58%, as rising yields and a stronger dollar reduced its appeal as a store of value.

The VIX climbed from 14.92 to 16.34, up about 9.5% on the month. Still not alarming, but the market’s comfort level did erode as the rate hike landed and uncertainty around the inflation path remained.

On the economic data front, there was genuinely good news: Q2 GDP was revised up to 2.2%, well above earlier estimates, and the August jobs report showed 162,000 new jobs, far better than the 53,000 Wall Street had expected. The economy is not breaking down. What it is doing is absorbing higher rates, and so far, absorbing them reasonably well.

My Thoughts for October

October brings a packed calendar that will go a long way toward shaping the market’s direction for the rest of the year:

  • Jobs Report (Friday, October 3): The most important number of the month. August’s print of 162,000 jobs came in well above expectations, but the Fed hiked anyway. September’s number will tell us whether the labor market is beginning to feel the pressure of higher rates, or whether it remains resilient. A soft number gives the Fed reason to pause. A strong number keeps another hike on the table.
  • CPI and PPI (week of October 14-15): With oil up over 5% in September and the Iran conflict still driving energy costs, the inflation readings will be the first real test of whether that pressure is feeding into broader consumer prices. The Fed is watching this data more closely than anything else right now.
  • Federal Reserve (October 28): After September’s hike, the question is whether the committee pauses or continues tightening. Chair Powell’s tone and the dot plot will matter as much as the decision itself.
  • PCE (October 30): The Fed’s preferred inflation gauge. With core PCE still running at 3.0% annually, any uptick here hardens the case for additional hikes.
  • Iran: The framework for a longer-term agreement remains unfinished. Progress would put meaningful downward pressure on oil and ease inflation fears broadly. Further escalation does the opposite. This remains the single biggest variable for markets heading into the fourth quarter.

As we move through the second half of the year, we remain constructive on the broader market. Pullbacks in technology and AI-related themes have historically been met with renewed buying interest, and we don’t expect that dynamic to change. Rotation is a normal and healthy part of any bull market — not every sector moves at the same time. When sell-offs come, we view them as opportunities to invest in the themes and companies we believe in for the long term. Volatility is the price of admission. We remain focused, patient, and engaged on your behalf.