March 26, 2026
The clearest message from the last week is that thematic leadership has become much narrower and much more tactical. Markets are no longer rewarding broad narrative exposure. They are rewarding themes that either have a clear catalyst, a credible earnings path, or a direct link to the current macro shock.
- The market is still trading geopolitics first, themes second
The dominant driver remains the Iran conflict, and that has made every thematic move conditional on the oil tape and the Treasury market. On Friday, the market was firmly in a risk-off posture as higher oil, higher yields, and longer-duration war scenarios weighed on sentiment; by Monday and Wednesday, equities bounced on de-escalation talk and ceasefire headlines; and by this morning, the setup had flipped back to oil up, yields up, stocks down as the market again focused on a possible U.S. “final blow” scenario and the lack of a clean Strait of Hormuz resolution. The pattern has been consistent: off-ramp headlines support cyclicals and high beta, while renewed conflict headlines push investors back toward defensiveness and cash-flow quality.
- The strongest near-term trend is a tactical rebound in cyclicals, not a full risk-on regime shift
ETF Database source material for 3/26 shows the best 1-week category performance in Travel (+2.0% weighted), Homebuilders & Construction (+1.7%), Alt Energy (+1.6%), Semiconductors (+1.3%), and Biotechnology (+1.25%). That lines up with the daily headline flow: airlines, trucking, building products, industrial metals, and small caps all responded well when the market saw any chance of a ceasefire or lower oil. Monday’s rally was led by travel/tourism, semis, transports, homebuilders, and industrial metals, while Wednesday again saw airlines, industrial metals, and trucking outperform as oil pulled back and yields eased.
But the more important point is that the 1-month numbers still look weak for most of those same categories. Travel is still -9.9% on a weighted 1-month basis, homebuilders are -12.5%, and semiconductors are -6.2%. That says the move is a rebound inside a damaged tape, not a clean regime reversal.
- AI is still the core thematic battleground, but leadership has split sharply
The strongest secular theme remains AI, but the winners and losers are no longer moving together.
The source material shows Semiconductors still holding up relatively well on a 1-week basis, but also suffering heavy redemptions: about -$917M over 1 week and -$1.4B over 1 month. Software is even more interesting. It is the worst 1-week category in the file at roughly -3.6% weighted, yet it still attracted about +$338M in 1-week flows and +$2.5B over 1 month. That tells you investors are still allocating to software strategically, but tactically they are punishing the application layer whenever AI disruption fears resurface.
That split fits the headlines almost perfectly. Over the last week, the market got:
- OpenAI planning to nearly double headcount, with hiring focused on engineering, research, product, and sales.
- Pentagon adoption of Palantir AI as a core military system.
- ARM upgraded and then surging again after entering the CPU market directly, with Meta as its first major customer and ambitious five-year revenue targets.
- Alibaba launching a new chip for agentic AI and inference, while also targeting $100B in AI and cloud revenue over five years.
- Google’s TurboQuant algorithm weighing on the memory trade by reducing model memory requirements.
- Ongoing software disruption fears tied to Anthropic, OpenAI, and broader AI workflow competition.
The tactical conclusion is that AI infrastructure remains the stronger near-term expression than AI application software, and within infrastructure, CPU, inference, and hyperscaler monetization look more durable than memory.
- Biotech is quietly one of the strongest short-term themes
Biotechnology has become one of the cleanest tactical outperformers of the last week. In the ETF Database source material, the group is +1.25% weighted over 1 week, with strong one-day action as well. The headlines explain why: this has been a week of clinical readouts and M&A.
The catalyst list has been unusually rich:
- Gilead confirmed its acquisition of Ouro Medicines for up to roughly $2B.
- Sarepta surged on positive early data in facioscapulohumeral muscular dystrophy and myotonic dystrophy.
- Terns agreed to be acquired by Merck for $6.7B.
- Apogee and Insmed both posted favorable trial updates earlier in the week.
That combination—clinical wins plus takeout premiums—has made biotech one of the few themes with a self-contained catalyst path that is less dependent on where oil trades tomorrow morning.
- Energy security is still strategic, but metals and precious-metals trades are being treated as rentals
Energy remains the most important macro theme, but investors are differentiating sharply within it.
The ETF Database source material shows MLP / energy infrastructure still looking constructive, with +0.87% weighted over 1 week, +4.39% over 1 month, and positive flow support. By contrast, Natural Resources is one of the most revealing categories in the file: despite some of the strongest short-term price moves in miners and metals, the category has seen about -$1.78B in 1-week flows and a massive -$9.3B over 1 month. That says investors are willing to trade commodity spikes, but they are not eager to rebuild broad natural-resource exposure.
Again, that fits the headlines. Over the week, the market dealt with:
- repeated Strait of Hormuz disruption stories and transit fees,
- a Qatari LNG strike described as a nightmare scenario for energy markets,
- anti-smog gasoline waivers and oil-stock release discussions from Washington,
- and commentary that U.S. shale and North American chemical producers could emerge as relative winners in a tighter supply world.
So the stronger near-term trend is not “buy commodities.” It is own energy security where cash flows are visible and U.S./North American exposure is high.
- Private credit stress is no longer an isolated issue
One underappreciated trend this week is the persistence of private credit stress. Apollo stuck to its 5% withdrawal cap after investors requested to redeem 11.2% of its flagship fund, while FSK was cut to junk and the market continued to talk about redemptions, asset quality, and the possibility of using listed PE/credit names as hedging vehicles.
That matters for thematic allocation because it is one more reason investors continue to prefer liquid ETFs, public-market cash-flow themes, and quality income over private-market narratives.
Tactical read-through
The strongest near-term trends are:
First, AI infrastructure over AI applications.
The market still wants semis, CPU exposure, inference, and hyperscaler-linked monetization. It is much less comfortable with software models that can be disrupted or repriced quickly.
Second, biotech as an event-driven alpha pocket.
M&A and clinical catalysts are making healthcare innovation more tradable than broad healthcare defensiveness.
Third, energy security over broad commodity beta.
Midstream, pipelines, and North American energy-linked industrials look better than crowded gold, silver, or broad natural-resource baskets.
Fourth, tactical cyclicals on every ceasefire hint.
Travel, homebuilders, small caps, and industrial metals can rally hard on any credible de-escalation signal, but the 1-month data says investors still do not trust those moves yet.
Bottom line
The market has spent the last week telling you that the strongest themes are not the loudest ones. The durable near-term trends are AI infrastructure, biotech catalysts, and energy-security cash flows. The weaker ones are broad commodity hedges, app-layer software exposed to disruption, and cyclical beta that still needs a real ceasefire to stick. The tape remains highly tactical, but the leadership is getting clearer.
Data sourced from FactSet Research Systems Inc.
Insights are derived from our ETFThemes.com Thematic Database of over 280 highly liquid thematic ETFs.
