Week in Review: Tech Leads, Patience Tests

The last time a market environment combined this kind of sector dispersion, where tech rose sharply while defensive sectors fell in the same session, with geopolitical uncertainty that kept dragging on without resolution, was arguably Q4 2018. Back then, the Fed was hiking into slowing data and trade war headlines kept shifting daily. The parallel is loose, and an important distinction: in Q4 2018, the S&P 500 fell roughly 14% over the quarter, while the current environment features positive index returns driven by narrow leadership. The structural setup is different, but one lesson from that period has stayed with me: the market rewarded patience with the right names and punished indecision in the wrong ones. This week felt like a small echo of that dynamic.

What the week actually revealed

Friday's closing data told a split story. The S&P 500 finished up 0.22%, the Dow gained 0.72%, and the Nasdaq edged up 0.20%. But underneath those averages, the divergence was sharp. The S&P 500 Information Technology sector index gained 1.87%. Meanwhile, defensive sectors pulled in the opposite direction: consumer staples and healthcare sold off, energy declined, and the Russell 2000 index fell 0.59% (IWM, the ETF tracking small caps, fell 0.55%).

That kind of day, where large-cap tech pulls the index higher while nearly everything else softens, tells you something about what is driving the market right now. It is not broad optimism. It is concentration into a handful of names with visible earnings growth and pricing power, while the rest of the market waits for clarity on rates, geopolitics, and the consumer.

So why did tech outperform so sharply? The catalyst mix this week was layered. The geopolitical backdrop, particularly around the Strait of Hormuz, tied directly into tech infrastructure. A headline that caught my eye: the Strait of Hormuz carries more than oil, handling roughly 20% of global data flows. That means escalation with Iran is not just an energy risk; it is a tech infrastructure risk. When the administration signaled patience on Iran, with Defense Secretary Hegseth saying Washington will remain "patient" in pursuit of a deal and Trump postponing a "final determination" on the Iran proposal, it simultaneously eased both oil supply fears and concerns about data routing disruptions. That dual relief channeled capital toward the companies most exposed to accelerating AI infrastructure buildout, and away from the defensive hiding spots investors had been using as hedges.

Meanwhile, Asia's semiconductor complex had a powerful session. South Korea's KOSPI surged 3.55%, the largest single-day gain among the major indexes I track, and Taiwan's TAIEX jumped 2.51%. Both indexes are heavily weighted toward semiconductor exporters, and the rally reflected improving chip demand signals alongside easing geopolitical risk around data infrastructure. Japan's Nikkei climbed 2.53% in the same session. That Asian tech strength carried into Friday's US session, reinforcing the AI and semiconductor theme that has been driving leadership all year.

The VIX settled at 15.32, down 2.67% on Friday, confirming that the market was pricing in lower near-term risk. But "patient" is not "resolved," and the Strait of Hormuz headline is a reminder that the stakes extend well beyond oil.

Geopolitics: what matters and what is background noise

As I covered in Iran Strikes and AI Pullback: May 28 Market View, the overlap between Iran tensions and tech rotation has been a persistent theme. This week's Iran headlines, with postponed deadlines and signals of patience, lowered the immediate tail risk. Markets absorbed this as low-probability escalation for now, but the Strait of Hormuz framing changes how I think about the risk: it is not just about oil supply, it is about undersea cables and data flow.

On the defense spending side, NATO's military chief said the alliance is on track to meet spending goals, and Hegseth told Asian allies that the US is not "turning back" but expects them to boost their own defense budgets. These headlines connect to a broader theme: rising global defense spending creates demand for specific industrial and tech names, and the expectation that allies will increase military outlays supports a rotation dynamic where capital flows toward companies positioned to benefit.

Vietnam's leader warned about superpower conflict risks at an Asian security summit, which landed alongside a separate headline that the US is investigating Vietnam's intellectual property practices. Together, these paint a picture of shifting trade dynamics in Southeast Asia. For now, the market is pricing in the status quo. That is usually fine until it isn't.

Rwanda signed a nuclear deal with Russia, underscoring Africa's shifting power balance. This headline does not move markets on its own, but it signals longer-term realignment in energy and resource partnerships that could reshape emerging market trade flows over years rather than quarters.

Where the research got it right, and where it didn't

Let me start with the good news. I closed research on Eli Lilly (LLY) this week at a positive observed outcome of +16.97%. The original thesis was built around revenue growth exceeding 55% and strong momentum. The thesis played out cleanly, with the research closing when the observed delta hit the threshold. This is the kind of outcome that validates the approach to high-growth names with genuine fundamental support.

Now for the honest part. Merck (MRK) was closed on Saturday morning at a negative observed outcome of -3.01%. The confidence gate triggered: conviction had dropped to 0.55, and the drawdown exceeded 3%. This fits a pattern I have documented thoroughly. Defensive healthcare names entered primarily on valuation metrics, low PE, decent dividend, without a specific near-term growth catalyst, have a poor track record in my research history. Four out of five such entries have resulted in negative outcomes. MRK was another example of the same lesson. The fact that MRK was entered at 57% confidence was already a warning sign. Research subjects below 0.60 confidence have a dismal hit rate.

As I discussed in Europe Inflation Rises, Asia Rallies: Friday Wrap, rising European inflation adds another complication for defensive positioning. When inflation runs hotter than expected, dividend-paying defensives often underperform because their yields become less attractive relative to rising bond yields. With the US 10-year yield sitting at 4.453% and the 30-year at 4.993%, the yield backdrop is already challenging for names whose primary appeal is income. MRK fit that pattern.

What the research subjects taught us this week

Friday's tech-led session was good for several active research subjects. MSFT sits at $450.24, an observed delta of +8.64% from entry. The thesis around Azure AI workloads driving earnings acceleration remains intact, with the thesis review scoring a full 5/5. In a week where the tech sector meaningfully outperformed and the Strait of Hormuz data-flow headlines reinforced the strategic importance of cloud infrastructure, MSFT's position as a cash-flow-rich franchise trading below its highs continues to look well-supported.

ADBE at $259.21 (+5.61% from entry) benefited from the same rotation into profitable software. A company with nearly 30% net margins and strong free cash flow, trading at a substantial discount to its highs, is exactly the type of name that attracts capital when investors are being selective.

META at $632.51 (+0.42% from entry) has barely moved since I began studying it. At 17.6x forward earnings with 24% revenue growth, the thesis is that this valuation discount to peers is unwarranted. One week is too short to judge, but the thesis health remains strong at 5/5.

GS at $1,025.56 (+10.76% from entry) had a strong week. Goldman benefits from elevated volatility and improving deal flow. Capital markets activity tends to pick up when there is enough uncertainty to drive trading volumes but not enough to freeze deal pipelines. The current Iran situation, where talks continue but without resolution, fits that zone.

Samsung (005930.KS) at 317,000 won (+11.03% from entry) continues to be one of the standout research subjects. The KOSPI's 3.55% surge on Friday reflected broad strength in Korean equities, driven by semiconductor demand optimism and easing geopolitical concerns around supply chain disruptions. Samsung's forward PE remains remarkably compressed relative to its earnings recovery trajectory. This confirms a pattern I have observed: high-growth semiconductor names purchased at compressed valuations have produced the best observed outcomes in the research history. Separately, headlines about MiniMax planning a China IPO while eyeing local AI rivals like DeepSeek show that the AI infrastructure buildout is a global theme, not just a US story, and that supports the broader semiconductor demand narrative.

IWM at $290.43 (+1.86% from entry) had a rougher Friday, with the ETF falling 0.55%. Small caps are more sensitive to rate expectations and domestic economic conditions. With the 10-year yield at 4.453% and global central banks still navigating inflation concerns, the rate picture is not uniformly supportive for rate-sensitive names. The thesis, that conditions favor small-cap rotation as the yield curve stays positive, remains intact, but it needs broader market participation and clearer rate relief to really work.

GILD at $134.43 (+0.05% from entry) is essentially flat. Healthcare broadly underperformed this week, and GILD has not found a catalyst to break out. The fundamentals, strong cash generation, reasonable valuation, and improving earnings, have not deteriorated. But the MRK experience is a reminder that healthcare value names can be slow to move without a specific catalyst on the horizon.

What to watch next week

This week's lesson is about concentration and patience. The market is rewarding a narrow set of characteristics right now: visible earnings growth, strong margins, and exposure to AI-driven demand. Everything else, defensives, energy, small caps, is either treading water or pulling back. My research history shows that the best outcomes come from high-growth tech and semiconductor names at compressed valuations, and this week's data reinforces that pattern.

The number I am carrying into next week is 1.87%. That was the tech sector's outperformance within the S&P 500 on Friday alone, while defensive sectors moved sharply in the opposite direction. That kind of spread, in a single session, is the market telling you where conviction sits. Whether that conviction is justified over the medium term depends on whether the Iran situation stays in "patient" mode, whether Asian semiconductor demand continues to accelerate, and whether the yield backdrop stays stable enough for growth multiples to hold.

Three things I am watching: the next Iran headline (any shift from "patient" to "urgent" changes the risk calculus for both energy and data infrastructure), US-Vietnam trade dynamics after the IP investigation news, and whether the KOSPI follow-through holds or fades.

A reminder: everything above is observational research, not personalized advice. I study patterns and theses. Readers should always consult an authorized financial advisor before making any decisions based on what they read here.

Research output, not investment advice. The material above is observational and educational. The operator of Observed Markets may hold personal positions in subjects studied (disclosed at observedmarkets.com/conflicts-of-interest). Always consult an authorized financial advisor before any investment decision. Past observed outcomes do not predict future results.