Equity markets moved erratically across the week as investors grappled with uncertainty stemming from the persistent Middle East conflict and its potential economic implications. The combination of geopolitical risk and event-driven headlines produced wide intraday swings, with certain sectors hit hard while a handful of individual companies rallied on corporate developments.
Memory stocks slip after earlier rallies
Several memory-focused companies that produced strong returns through 2025 and into the start of this year retraced some of their gains in the past five trading days. Sandisk led the pullback in the group, declining by just over 11% during the week. Western Digital eased nearly 7.9%, Micron slipped about 4%, and Seagate dropped 8.8% over the same period. These moves represent a meaningful giveback for names that had been among the market’s stronger performers earlier in the cycle.
Airlines feel the immediate effects of the conflict
Airline shares worldwide were among the most affected sectors as the conflict generated fresh demand uncertainty and travel disruption concerns. Major U.S. carriers saw steep weekly losses: American Airlines fell 17.1%, Delta declined 13.4%, United Airlines was down 18.5%, and both Southwest and Alaska Air Group tumbled 20%. JetBlue posted the largest drop among the U.S. names, plunging 22% within the week.
European and U.K. carriers were also punished by the risk-off mood. IAG, the owner of British Airways, slid 20.5% over the week, while EasyJet and Lufthansa each declined by approximately 13% as investor caution weighed on travel-related equities broadly.
Day One Biopharmaceuticals soars on acquisition agreement
In contrast to the broader weakness, Day One Biopharmaceuticals jumped sharply on Friday after a deal was announced. The company agreed to be acquired by Servier for $21.50 per share in cash. The transaction values Day One at an implied equity value of roughly $2.5 billion and is expected to close in the second quarter of 2026. Shares of Day One surged more than 65% on the acquisition news, reflecting the premium embedded in the cash offer.
Marvell rises after beating expectations and providing upbeat guidance
Chipmaker Marvell Technology rallied Friday, trading up about 22% as of 13:45 ET after releasing quarterly results that topped consensus estimates and offering constructive guidance. The post-report uplift was reinforced by an analyst note from William Blair, where the analyst reiterated an Outperform rating and highlighted Marvell’s positioning across AI infrastructure via interconnect, custom ASIC, switching and storage products. The analyst expressed a constructive view on accelerating revenue growth over coming quarters.
The Trade Desk jumps on partnership rumors
The Trade Desk posted a strong weekly gain, rising more than 18% on Thursday before easing slightly on Friday, leaving the stock up over 23% across the week. The midweek advance followed media reports suggesting a potential partnership with OpenAI. Market reactions included divergent analyst responses: Evercore ISI noted that generative AI engines could materially add to advertising gross spend relative to The Trade Desk’s 2025 gross spend base, while another analyst at Wedbush cautioned that the rumored deal may not justify the stock’s valuation and downgraded the shares to Underperform.
Where markets stand
The week’s price action underscores how geopolitical events can amplify volatility and produce uneven outcomes across sectors. Memory and airline stocks bore the brunt of risk-off flows, while certain company-specific announcements provided upward catalysts for individual equities. Investors remain attentive to the length and severity of the conflict and the knock-on effects for travel demand, supply chains and corporate investment decisions.
Key points
- Geopolitical risk from the ongoing Middle East conflict increased market volatility and weighed heavily on travel and cyclical sectors.
- Memory stocks - Sandisk, Western Digital, Micron and Seagate - fell back after prior rallies, reversing a portion of their earlier gains.
- Individual company events caused outsized moves: Day One Biopharmaceuticals surged on an acquisition; Marvell climbed after beating earnings and raising guidance; The Trade Desk rallied amid partnership rumors.
Risks and uncertainties
- Persistence of the Middle East conflict - continued geopolitical escalation could further pressure airline and travel-related equities.
- Sector sensitivity to risk-off flows - memory and other cyclical segments remain vulnerable to rapid sentiment shifts tied to macro and geopolitical developments.
- Reliance on event-driven catalysts - companies that moved higher did so largely on specific news items, leaving them exposed if transactions or partnership talks do not progress as expected.