The S&P 500 fell 0.39% to 6,343.72 and the Nasdaq shed 0.73% to 20,794.64 as WTI crude settled at $102.88 — its first close above $100 since 2022 — with tanker traffic through the Strait of Hormuz still down more than 90% entering the session's fourth week of near-total disruption. ^[4] The Dow eked out a +0.11% gain to 45,216.14 on defensive rotation, while the Russell 2000 bore the brunt of the risk-off shift, falling 1.46% to 2,414.01. ^[1] The bond market delivered the session's sharpest signal: the 10-year Treasury yield broke below 4% intraday — a threshold last crossed in September 2024 — and settled near 4.00%, down roughly 44 basis points from Friday's close, pricing growth risk above inflation risk for the first time in the conflict cycle. ^[5]

What moved it

The oil move is the story. WTI's first sustained settlement above $100 since 2022 embeds a war premium now estimated at $14–18 per barrel, with no physical resolution in sight. ^[10] Iranian forces struck the Al Taweelah smelting complex in Abu Dhabi and Aluminium Bahrain's facility over the weekend, widening the conflict's footprint from crude to industrial metals. U.S. naval forces are conducting minesweeping operations and carrier-led strikes on IRGC facilities at Bandar Abbas to force the strait open, but tanker traffic remains effectively paralyzed. ^[4]

Trump indicated "serious discussions" with Iran were underway, lifting futures briefly before the session opened. The bounce faded; markets assessed it as process, not progress. ^[11]

The macro backdrop amplified the risk-off impulse. The University of Michigan's final March consumer sentiment reading came in at 53.3 — a 2026 low — with one-year inflation expectations at 3.8%. February nonfarm payrolls were revised to –92,000, with unemployment ticking to 4.4%. ^[7] Fed Chair Powell, speaking at Harvard, said current rates are "in a good place" and that the Fed intends to look through the energy shock. The read-through: no near-term policy relief. The bond market responded by rallying anyway — not because the Fed is cutting, but because growth fears are overwhelming the inflationary impulse.

Sector scoreboard

Energy led all sectors, gaining roughly 1% as upstream producers captured the full margin benefit of oil above $100. ExxonMobil and Chevron both advanced on expanding production economics. ^[2]

Materials ran in tandem, lifted by aluminum's surge to four-year highs after the Iranian strikes on Middle Eastern smelters tightened physical supply for automotive and aerospace end-markets. Alcoa surged 11–12% on direct exposure to primary aluminum pricing. ^[6]

Technology was the clear laggard, with semiconductors leading the decline. The S&P 500 is now down approximately 7.3% year-to-date; the Dow's fractional gain was arithmetically narrow, driven by a handful of defensive names — Salesforce, Travelers, Disney — offsetting broad declines in cyclicals like Caterpillar (–4%) and Cisco (–3.6%). Breadth was negative: decliners outnumbered advancers across both the NYSE and Nasdaq, consistent with broad institutional de-risking rather than sector rotation. ^[3]

Movers

Micron Technology (MU): –9.6%. The worst large-cap move of the session and now roughly 30% off recent highs. A reported Google breakthrough that could reduce memory requirements for certain AI workloads intensified selling pressure following last week's earnings-driven slide, with SanDisk and Western Digital falling 7–9% in sympathy. ^[8] The move questions whether AI infrastructure buildout translates as directly into memory demand as the bull case assumed.

Nvidia: –1.4%, now more than 21% below its all-time high. With the forward P/E having compressed below the S&P 500 average last week, today's decline reflects a broader reassessment of AI-linked valuations in an environment where input costs are rising, the consumer is weakening, and growth expectations are eroding. TSMC fell 3.1% in New York trading.

What to watch

April 6 deadline. Trump extended the Hormuz re-opening ultimatum by 10 days from March 27, putting the clock at April 6. Any credible back-channel development before that date moves crude and equities more than any scheduled data this week. Continued silence pushes $110+ Brent into the market's base case.

Nike earnings (Tuesday, March 31). The first major consumer bellwether of the quarter reports after the close Tuesday. With the UMich sentiment print at a 2026 low and discretionary spending under visible pressure, guidance on North American consumer health will be read beyond footwear.

Tesla Q1 deliveries (expected April 2). Deliveries are the clearest near-term data point for whether EV demand is holding at current price points. Tesla is down approximately 20% YTD; a miss would extend that.

Good Friday close (April 3). Markets close early Thursday and are fully closed Friday. This is a four-day week for active trading, which compresses the window for positioning adjustments ahead of whatever geopolitical developments unfold over the weekend.

The 4% yield threshold. The 10-year's break below 4% is a regime signal — it means the bond market is now net-long the recession narrative over the inflation narrative. If it holds below 4% into week-end, expect equity multiple compression to accelerate even if oil stabilizes. ^[5]