US-Iran talks became the market’s main macro driver at the start of the week, easing fears of a deeper Middle East supply shock and pushing crude prices lower. WTI crude fell to about $75.27 a barrel, while Brent traded near $79 after officials highlighted progress in negotiations and outlined steps to keep the Strait of Hormuz open.
That move in energy helped cap broader risk anxiety, but equities lacked clear direction. S&P 500 futures slipped 0.1% while Nasdaq 100 futures edged up 0.1%, with semiconductor stocks again leading even as several megacap technology names traded lower before the open.
The combination of softer oil, firmer chip sentiment and a busy political backdrop in the UK left investors balancing relief on geopolitics with caution ahead of Micron’s earnings and the Federal Reserve’s preferred inflation gauge later in the week.
Key Facts
- WTI crude fell $0.58 to $75.27 a barrel, while Brent traded around $79 after signs of progress in US-Iran talks.
- S&P 500 futures were down 0.1% and Nasdaq 100 futures were up 0.1% in premarket trading.
- US 10-year Treasury yields rose about 3 basis points to roughly 4.48% as cash trading resumed.
- Micron earnings are due on Wednesday, while the May core PCE inflation report is scheduled for Thursday.
- Getty Images surged more than 150% premarket after announcing a display partnership with OpenAI, while Apogee Therapeutics jumped 48% on a $10.9 billion buyout agreement with AbbVie.
US-Iran Talks and Market Reaction
The immediate market effect of the US-Iran talks was felt in oil. Traders had entered the week braced for headline risk around the Strait of Hormuz, one of the world’s most important shipping corridors for crude. Instead, diplomatic language pointed to de-escalation. Negotiators described progress, and both sides moved toward mechanisms meant to reduce the chance of incidents at sea and preserve shipping flows.
That mattered because the market had recently been pricing a higher geopolitical risk premium into energy. As crude reversed earlier gains, investors recalibrated expectations for inflation, consumer costs and central-bank pressure. Lower oil prices can ease worries about a fresh inflation impulse just as the Fed remains focused on stubborn price growth.
The reaction across equities was more selective than broad. Semiconductor shares remained the standout area, extending a rally tied to artificial intelligence spending, memory demand and expectations for another strong print from Micron. By contrast, several so-called Magnificent Seven stocks lagged in premarket trading, including Alphabet, Tesla, Amazon, Apple and Meta. That divergence suggests investors are still rewarding narrower AI-linked earnings visibility over index-heavy mega-cap exposure more generally.
Markets are treating progress in US-Iran talks as a release valve for oil risk, but the bigger test for equities now shifts to inflation data and whether AI-driven earnings can keep carrying leadership.
Why chips kept leading
The semiconductor trade remains unusually strong even with rates elevated and index valuations stretched. Investors are focusing on direct beneficiaries of AI infrastructure demand, particularly memory, compute and related supply-chain names. Expectations around Micron have become a near-term catalyst, with bullish forecasts implying revenue could exceed consensus meaningfully if data-center demand remains robust.
That enthusiasm is not isolated to the US. Asian markets were led by technology-heavy benchmarks, with gains of more than 1.5% in China and Japan, while South Korean chip names also attracted fresh buying. The pattern reinforces that capital is still rotating globally toward hardware and infrastructure tied to AI deployment rather than toward broader cyclical sectors.
Implications for Investors
For investors, the first takeaway is that geopolitics still matters most when it changes the inflation path. The drop in oil prices offers short-term relief for sectors sensitive to fuel and transport costs, and it may reduce pressure on inflation expectations if the de-escalation holds. But the market is not treating the issue as fully resolved. Any disruption in the Strait of Hormuz or breakdown in talks could quickly reverse the move in crude.
The second takeaway is that leadership in equities remains narrow. Chip stocks continue to absorb flows because they offer clearer links to earnings growth from AI capital expenditure. That creates opportunity in semiconductor names and related ETFs, but it also raises crowding risk. When one theme dominates market performance, earnings misses or cautious guidance can trigger outsized volatility.
Third, bond markets remain a critical watch-point. Treasury yields moved higher, with the 10-year near 4.48%, showing that relief in oil alone is not enough to push yields lower while investors await fresh inflation data. Thursday’s core PCE report could reshape expectations for Fed policy, especially after officials signaled a firmer stance and markets increased pricing for additional tightening. If inflation comes in hot, higher yields could challenge richly valued growth stocks even if chip demand remains strong.
There are also notable single-stock implications from the premarket tape. AbbVie’s agreement to buy Apogee Therapeutics for $10.9 billion underscores that large-cap pharma remains willing to pay for pipeline assets in competitive therapeutic categories. Arcosa’s rally after CRH agreed to acquire it for $150 per share signals that strategic consolidation remains active in industrials and building materials. Meanwhile, SpaceX’s planned high-grade bond sale, expected to be at least $25 billion, could become a major event in credit markets if demand proves strong.
Outside the US, UK political developments add another layer of asset-specific risk. Sterling briefly touched a 2026 low before recovering, and gilts rallied as investors viewed the leadership transition as orderly. Markets will likely focus less on the resignation itself and more on the fiscal stance of the next government leadership team, especially any implications for borrowing and deficit credibility.
The near-term market script is now clear: investors will watch whether diplomatic progress keeps oil contained, whether Micron validates the semiconductor rally, and whether the core PCE report strengthens or weakens the case for tighter Fed policy. If those three signals align, they could set the tone for risk assets into the second half of 2026.
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