“The trend is your friend, until it bends,” Ed Seykota (1995)
"Opportunity always knocks at the least opportune moment." — Murphy's Law
This is our continuing series where we apply a systematic/factor-based lens to the thematic investment landscape, focusing on fund exposures to common risk factors such as growth, value, momentum, quality, and volatility. Rather than judging a theme on narrative or recent performance alone, this systematic lens helps identify where investor sentiment may be building or recovering and the underlying risks expected to contribute to future volatility. Below, we review the broader factor backdrop across U.S. equities, then turn to this month’s Top Trending Themes (by Bloomberg Momentum factor), highlighting the Global X Genomics and Biotechnology ETF (GNOM), and the Most Out-of-Favor themes, highlighting the Global X U.S. Natural Gas ETF (LNGX).
For the month ending 9/30/2026, sentiment-based factors (Momentum, Estimate Revisions style factors) led Bloomberg U.S. equity universe factor performance, snapping back from underperformance over the prior two months. Fundamental factors (Dividend Yield, Growth, Quality, and Value) meaningfully underperformed as did Low Volatility, which significantly lagged the other factors on a trailing 1-year basis ending 9/30/2026. U.S. stocks experienced acute narrow breadth (% of stocks or factors outperforming the broader market) as the median stock in the S&P 500 Index fell 6% while the overall index only dropped 0.45% for the month ending 9/30/2026. The S&P Information Technology and Communication Services sectors were the only two major sectors to outperform in September, returning 4.5% and 4.3%, respectively, while all the other major sectors were negative for the month.
Trailing three-month performance reflects this environment of factor churn, witnessed by this year’s fluctuation of the Momentum factor from factor leader to factor laggard, as Momentum had previously experienced a sharp unwind between late June through late August. Yet, despite this sharp underperformance in early part of the third quarter, Momentum continued to lead all major factors year-to-date (YTD) through 9/30/2026. Overall market leadership remained concentrated in equity themes linked to advancements in Artificial Intelligence (AI) design and delivery, which may also influence how Momentum as a factor performs over the intermediate term.1
We continue to believe the fundamental backdrop for pro-cyclical leadership remains intact (see the Global X 2026 Mid-Year Outlook). As much as we are encouraged by the recovery in Momentum, we are mindful of the lack of factor breadth, particularly among fundamental-based factors where both growth and value performed poorly in September. If the narrowness in equity leadership persists, then further market advances may be built on a shrinking foundation. This could leave the broader market vulnerable to a major pullback, especially if the upcoming earnings season fails to meet expectations.
Note: all factors referenced in this article are defined by Bloomberg unless stated otherwise.

Key Takeaways
Following September’s recovery, Momentum continued to dominate U.S. equity factor leadership, as overall market leadership has grown increasingly concentrated in AI-technology focused companies. One may consider taking at least a neutral stance on Momentum, with an eye toward oversold themes whose growth fundamentals remain intact.
AI-adjacent computing, metals producers, genomics, and energy producers/distributors comprise our Top Trending Themes; we highlight the Global X Genomics & Biotechnology ETF (GNOM).
Genomics, food technology, energy producers, and dividend/cash-flow factors remain our most Out-of-Favor Themes (those that have lagged the broader market over the past four to five years) with genomics and conventional energy producers showing signs of recovery based on recent Momentum; we highlight the Global X US Natural Gas ETF (LNGX).

Among the Top Trending Themes, AI-adjacent and precious metal producers may benefit from positive growth factor exposure, while energy producers/distributors may benefit from positive value factor exposure.
As of 9/30/2026, we observe four thematic categories comprising the Top Trending list, as measured by the Bloomberg Momentum Factor. These themes have enjoyed positive pricing trends, signaling strong investor demand.
Top Trending Theme in Focus: Genomics & Biotechnology
This month we apply a factor lens to the Global X Genomics & Biotechnology ETF (GNOM). Here is the summary of the structural thesis:
The charts below examine the fund’s current factor exposure and fundamental/pricing trends.



The performance data quoted represents past performance. Past performance does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when sold or redeemed, may be worth more or less than their original cost and current performance may be lower or higher than the performance quoted. Performance current to the most recent month- or quarter-end is available here.

This month’s Top Out-of-Favor list, as measured by the Bloomberg Long-Term Reversal Factor, spans five categories. Many of the underlying securities held in these themes have underperformed over the past five years as investors moved on from the promising growth potential they once exhibited, though several are now showing signs of recovery.
Out-of-Favor Theme in Focus: Global X Natural Gas ETF (LNGX)
In this section, we’re applying a factor lens to the Global X Natural Gas ETF (LNGX). The long-term thesis is summarized here:
Here we review LNGX’s factor exposure and fundamental / pricing trends. Funds with under one year of history (like LNGX) are only shown with current factor exposures:



The performance data quoted represents past performance. Past performance does not guarantee future results. The investment return and principal value of an investment will fluctuate so that an investor’s shares, when sold or redeemed, may be worth more or less than their original cost and current performance may be lower or higher than the performance quoted. Performance current to the most recent month- or quarter-end is available here.
Conclusion
We believe a practical starting point for building a thematic equity portfolio is a core group of funds spanning a broad cross-section of themes, with opportunistic allocations to out-of-favor or underappreciated themes.
Related ETFs
AUAU – Global X Gold Miners ETF
AUSF – Global X AI Adaptive U.S. Factor ETF
CHPX – Global X AI Semiconductor & Quantum ETF
COPX – Global X Copper Miners ETF
DIV – Global X SuperDividend® U.S. ETF
FLOW – Global X U.S. Cash Flow Kings 100 ETF
GNOM – Global X Genomics & Biotechnology ETF
GOEX – Global X Gold Explorers ETF
GXPE – Global X PureCap℠ MSCI Energy ETF
KROP – Global X AgTech & Food Innovation ETF
LNGX – Global X U.S. Natural Gas ETF
MLPX – Global X MLP & Infrastructure ETF
QDIV – Global X S&P 500® Quality Dividend ETF
SIL – Global X Silver Miners ETF
SRET – Global X SuperDividend® REIT ETF
Click the fund name above to view current performance and holdings. Holdings are subject to change. Current and future holdings are subject to risk.


