Key Takeaways
- A firmer-than-expected core inflation reading, according to the Bureau of Labor Statistics, coincided with broad equity weakness and higher bond yields.
- Crude oil, as measured by the WTI ETF (USO), rose 9.09% for the week amid reports of a Saudi pipeline shutdown and continued geopolitical tensions.
- The European Central Bank raised its three key interest rates by 25 basis points, as announced by its Governing Council.
- U.S. small-cap stocks lagged, with the Russell 2000 ETF (IWM) down 2.41%, while large caps held up better.
- Energy was the strongest sector in the data, up 1.67%, while healthcare was the weakest, down 3.55%.
- Bonds broadly declined, with the long-term Treasury ETF (TLT) falling 1.63% as yields moved higher.
Markets at a Glance
September 7 – September 11, 2026
1-week total return by segment, via ETF proxies, measured from the prior week’s final close (Sep 4, 2026) through the Sep 11, 2026 close. Bars share one scale across groups.
Equities
Bonds
Sectors
Alternatives
Factors
Weekly Recap
Most equity segments finished lower for the week ending September 11, 2026. Among U.S. indices, the S&P 500 ETF (SPY) fell 0.78%, the Nasdaq 100 ETF (QQQ) declined 0.57%, and the Dow Jones Industrial Average ETF (DIA) dropped 1.55%. Smaller companies fared worst, with the Russell 2000 ETF (IWM) down 2.41%. The broad Russell 1000 ETF (IWB) slipped 0.84%.
International markets were also softer. The international developed ETF (EFA) fell 1.53% and the emerging markets ETF (EEM) declined 1.27%, though the latter remains up 34.18% over the trailing year in the data. The MSCI World ETF (URTH) lost 0.98% for the week.
Commodities were a notable exception. The broad commodities ETF (DJP) rose 2.19% and crude oil (USO) surged 9.09%, while gold (GLD) and silver (SLV) fell 2.01% and 2.84% respectively.
What Moved Markets This Week
Two macroeconomic developments framed the week. According to the Bureau of Labor Statistics release, the headline Consumer Price Index rose 0.4% in August, in line with expectations and up from 0.1% in July, while core CPI, which excludes food and energy, advanced 0.3%, above the 0.2% consensus and July's 0.2% reading. The firmer core figure coincided with higher bond yields and broad equity weakness across the data.
Separately, the European Central Bank's Governing Council decided to raise its three key interest rates by 25 basis points, as the central bank announced on September 10. European country markets were among the weaker performers in the data, with the Germany ETF (EWG) down 2.28% and the Switzerland ETF (EWL) off 4.48%.
Energy markets drew particular attention. As widely reported, Saudi Arabia shut its East-West crude oil pipeline as a precautionary measure following attacks, and crude prices climbed sharply amid continued U.S.-Iran tensions. That backdrop aligns with the week's 9.09% gain in the crude oil ETF (USO) and the 1.67% rise in the energy sector ETF (XLE), the strongest sector in the data.
Sectors and Equities
Sector performance was mostly negative but widely dispersed. Energy (XLE) led with a 1.67% gain, and communication services (XLC) rose 0.51%, while technology (XLK) edged up 0.22%. On the other side, healthcare (XLV) fell 3.55%, materials (XLB) declined 2.84%, and consumer discretionary (XLY) dropped 1.73%.
The spread between the strongest and weakest sectors this week illustrates how a single macro theme, in this case rising energy prices, can pull one part of the market higher even as most others decline. Over the trailing year, the dispersion is wider still: energy (XLE) is up 50.69% in the data while communication services (XLC) is down 0.52% and consumer discretionary (XLY) is off 2.27%.
Among country markets, Brazil (EWZ) rose 0.87% and South Korea (EWY) was nearly flat at -0.12%, while China (MCHI) and Switzerland (EWL) fell 3.55% and 4.48% respectively.
Fixed Income and Rates
Bonds broadly declined as yields rose, consistent with the firmer core inflation reading. The U.S. aggregate bond ETF (AGG) fell 1.06%, the intermediate Treasury ETF (IEF) dropped 1.34%, and the long-term Treasury ETF (TLT) lost 1.63%, reflecting how longer-duration holdings tend to move more when rates shift. Shorter maturities held up better, with the short-term bond ETF (SHY) down just 0.39%.
Investment-grade corporate bonds (LQD) fell 1.10% and high yield bonds (HYG) declined 0.69%. Over the trailing year, the aggregate bond ETF (AGG) shows a return of -0.57% in the data, a reminder that fixed income has delivered modest results across the period covered here.
Factors and Style
Factor strategies were mixed but mostly lower. Momentum, which tilts toward stocks with strong recent price trends, was the standout, with the momentum ETF (MTUM) rising 0.65%, the only clearly positive factor in the data. High beta (SPHB) was nearly flat at -0.16% and growth (VUG) fell 0.52%. Weaker readings came from dividend growth (SCHD), down 1.98%, equal weight (RSP), down 1.88%, low volatility (USMV), down 1.23%, and quality (QUAL), down 1.06%. Value (VLUE) declined 1.13%.
The style box showed a size effect this week. Larger companies held up better than smaller ones, and large value (IWD) was the most resilient at -0.77%, while small growth (IWO) lagged at -2.69% and small value (IWN) fell 2.17%. Mid-cap segments landed in between, with mid value (IWS) down 1.91%. Over the trailing year, the style differences are pronounced: large value (IWD) is up 29.12% in the data while mid growth (IWP) is down 3.48%.
What This Means for Long-Term Investors
This week offered a clear illustration of why diversification across asset classes matters: while most equity segments and bonds declined together as core inflation came in firm and yields rose, energy and broad commodities moved sharply higher, cushioning a fully diversified mix. For investors with long time horizons, a single week of losses in stocks and bonds is best read in the context of the trailing-year figures in the data, which remain positive for many equity segments even as fixed income sits near flat, a reminder that short-term moves and longer-term results can diverge considerably.
Performance figures reflect ETF proxies for each market segment. Weekly returns are measured from the prior week’s final close (September 4, 2026) through the September 11, 2026 close; month and year figures are anchored to the same ending close. Dates reflect actual trading sessions, so market holidays can shift them.
This commentary is provided by Rubric Advisors, a California-registered investment adviser (registration does not imply a certain level of skill or training), for informational and educational purposes only. It does not constitute investment, legal, or tax advice, is not a recommendation or offer to buy or sell any security, and should not be relied upon as the sole basis for an investment decision. Market segment performance is measured using exchange-traded fund (ETF) proxies, which reflect fund expenses and may differ from their underlying indices; figures are unaudited and drawn from third-party data believed reliable but not guaranteed. Past performance does not guarantee future results. All investing involves risk, including possible loss of principal. Options strategies are not suitable for all investors, and private market investments are available only to qualified clients.