From Nvidia to ARM Holdings, the Nasdaq 100 posted broad-based gains on April 1st as geopolitical de-escalation hopes, AI infrastructure momentum and semiconductor strength combined to drive one of the index's strongest single-session performances of 2026

A sea of green swept across the Nasdaq 100 on April 1st 2026, with virtually every major technology and semiconductor name posting significant gains in a rally that analysts attributed to a convergence of three powerful forces: a potential off-ramp from the US-Iran conflict, sustained AI infrastructure demand, and a semiconductor equipment sector that is quietly becoming one of the most important bellwethers in global markets.

The breadth of the move was as notable as its magnitude. This was not a rotation driven by a single earnings beat or product announcement. It was a market-wide repricing of risk, triggered by signals that the geopolitical overhang that has weighed on equities since the conflict escalated may be approaching resolution.

Trump's Iran Timeline Shifts the Calculus

The single most significant catalyst for the day's rally was a statement from President Donald Trump indicating that he expects the Iran conflict to be resolved within two to three weeks. The remark, which came amid ongoing diplomatic pressure on Tehran and intensified US naval operations in the Gulf, shifted the market's risk calculus materially.

The Iran conflict has been the primary source of equity market anxiety since it escalated in early 2026. Oil prices surging toward $150 per barrel, the threatened closure of the Strait of Hormuz, and the 25% tariff on AI chips imposed in response to the geopolitical environment had all compressed technology valuations. A credible timeline for de-escalation removes, or at minimum suspends, each of those headwinds simultaneously.

If the conflict winds down on the timeline Trump suggested, oil prices would be expected to retreat from current levels, easing the inflationary pressure that has been the single most important concern among American consumers. The Federal Reserve, constrained in its monetary flexibility by persistent inflation partly attributable to energy costs, would regain room to manoeuvre. And the 25% AI chip tariff, which had created significant uncertainty for semiconductor supply chains, could be revisited in a calmer geopolitical environment.

Markets priced all of that in a single session.

The Semiconductor Complex Leads

The most striking individual performer in the Nasdaq 100 on April 1st was ARM Holdings (ARM), the British-headquartered chip architecture company majority-owned by SoftBank, which surged 10.46%. ARM's gains reflect a market reassessment of its positioning in the AI inference cycle. Unlike traditional semiconductor manufacturers, ARM licenses chip designs rather than fabricating silicon, giving it exposure to every major AI hardware build-out globally, from Apple's custom silicon to the chips inside Nvidia's data centre products.

Marvell Technology (MRVL) was close behind, rising 12.80% in what represented the index's largest single-day percentage gain among significant-cap names. Marvell has emerged as a critical supplier of custom AI accelerators to hyperscale cloud customers, a segment of the market that is growing as Meta, Amazon and Google accelerate their efforts to reduce dependence on general-purpose GPUs from Nvidia (NVDA).

Nvidia itself gained 5.59%, extending a recovery from its recent lows. At $174.40 heading into the session, Nvidia had already staged a partial rebound from its 20%-plus correction from the all-time high of $212.19. The April 1st gains were driven partly by the Iran de-escalation signal, which reduces the immediate threat to chip export revenues, and partly by continued evidence of tightening GPU rental markets, with even legacy A100 hardware commanding rising prices as inference demand accelerates.

Applied Materials and the Equipment Cycle

Applied Materials (AMAT), up 5.78%, and KLA Corporation (KLAC), up 6.50%, both posted strong gains, as did Lam Research (LRCX), which rose 6.87%. The semiconductor equipment trio has become an increasingly important signal for where the broader chip cycle is heading. Unlike the chip designers and manufacturers whose revenues fluctuate with product cycles, equipment makers capture spending at the point where foundries commit capital to expanding capacity. Their collective strength on April 1st suggests the market believes the AI-driven capex cycle has significantly further to run.

Applied Materials, whose deposition and etching tools are essential to advanced node manufacturing, has direct exposure to TSMC's Arizona expansion and Samsung's US fab investments, both of which are proceeding on accelerated timelines under the CHIPS Act framework. KLA's process control equipment, which ensures yields at the leading edge of semiconductor manufacturing, is similarly positioned to benefit from capacity additions that are now running years rather than quarters ahead of historical norms.

Intel (INTC), up 7.14%, staged one of its more convincing single-session recoveries in recent memory. The company's ongoing foundry transition, its partnership with the US Department of Defence on domestic chip production, and early signals that its 18A process node is progressing toward yield targets all contributed to a reassessment of a stock that had been among the most heavily shorted in the Nasdaq 100.

Platform and Software Names Join the Rally

Meta Platforms (META) rose 6.67%, reflecting both the broader risk-on mood and the company's specific positioning at the intersection of AI infrastructure and advertising revenue. Meta's capital expenditure guidance for 2026, which pointed to between $60 billion and $65 billion in AI infrastructure spending, had initially spooked investors concerned about returns on that investment. The April 1st move suggests growing confidence that the AI monetisation cycle is progressing faster than the market had assumed.

Palantir Technologies (PLTR) gained 6.35%, extending a run that has made it one of the Nasdaq 100's stronger performers in 2026. Palantir's government AI contracts, particularly its expanding presence across US defence and intelligence agencies, position it as a direct beneficiary of the military-industrial AI build-out that the Iran conflict has, paradoxically, accelerated. Defence AI spending tends to be sticky and long-duration, insulated from the cyclical demand questions that affect commercial chip revenues.

AppLovin (APP) rose 6.97%, continuing its emergence as one of the index's most closely watched names. The mobile advertising and AI platform company has delivered earnings growth that has consistently surprised analysts to the upside, and its AI-driven advertising optimisation tools have found rapid adoption among performance marketers.

Shopify (SHOP) added 6.13%, while MercadoLibre (MELI), the Latin American e-commerce platform, gained 6.78%, reflecting a broader recovery in growth-oriented names as rate expectations softened on the Iran de-escalation signal.

Western Digital (WDC) climbed 7.48% and STX, Seagate Technology (STX) gained 8.09%, as storage demand, driven by the data requirements of AI training and inference workloads, continued to provide a fundamental floor under hardware names that had lagged the broader AI rally.

The Bigger Picture

April 1st's gains are best understood not as a single-day event but as the market's attempt to recalibrate around a scenario it had not fully priced: the possibility that the Iran conflict resolves faster than the most pessimistic scenarios had assumed, that AI infrastructure demand is more durable than the post-DeepSeek scepticism suggested, and that the semiconductor equipment cycle is earlier in its expansion than the valuation compression of recent months implied.

None of those propositions is yet confirmed. Trump's two-to-three week timeline for Iran is an aspiration rather than a framework, and the Strait of Hormuz question, as strategists from Ray Dalio to senior Pentagon officials have noted, will ultimately be settled by events on the water rather than statements at the podium. AI capex returns remain unproven at the scale being deployed. And semiconductor equipment orders, while strong, are subject to the same geopolitical export risks that have complicated Nvidia's revenue picture.

What April 1st demonstrated, however, is how quickly and comprehensively the Nasdaq 100 can reprice when the direction of travel on those questions shifts. The index did not need certainty. It needed a credible reason to believe the worst-case scenarios were receding.

Key tickers referenced: NVDA, META, PLTR, AMAT, LRCX, INTC, KLAC, ARM, APP, WDC, MRVL, STX, SHOP, MELI, MPWR, INSM, MCHP