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US stock markets hit record closing highs as reports of a potential 60-day US-Iran ceasefire extension boost investor sentiment despite ongoing inflation.
The S&P 500 and Nasdaq Composite reached record closing highs on May 28, driven by reports that the United States and Iran have reached a draft agreement to extend their ceasefire for 60 days [1]. While the Dow Jones Industrial Average also finished at a record high, the broader market rally was fueled by optimism regarding the potential de-escalation of regional tensions and strong corporate earnings [1].
Key takeaways
The market rally occurred despite recent economic headwinds, including a downward revision of first-quarter GDP to a 1.6% annualized increase [2]. Investors are currently balancing the potential for a ceasefire against persistent inflationary pressures [1]. Jamie Cox, managing partner at Harris Financial Group, noted that traders are "on a hair trigger" regarding deal news, as market participants attempt to position themselves for positive outcomes while remaining wary of how quickly inflationary forces will subside [3].
Technology and healthcare sectors provided significant momentum for the session. Snowflake shares surged 36% following the announcement of a $6 billion AI infrastructure deal with Amazon Web Services [1]. In the healthcare sector, Eli Lilly shares advanced 4% after CVS Health announced it would restore coverage for the drugmaker’s weight-loss injection, Zepbound, and add its new obesity pill, Foundayo [2]. Additionally, drone-related stocks saw gains following reports that the Trump administration is considering funding for the sector [1].
The recent market performance highlights a resilience in corporate earnings that has allowed investors to look past geopolitical instability in the Middle East [1]. While the S&P 500 is currently trading at 21 to 22 times forward earnings—above its 10-year average of 19.7—analysts suggest that rising earnings expectations are mitigating concerns over valuations [2]. Experts believe that ongoing geopolitical tensions could paradoxically reinforce long-term investment cases in specific sectors, such as cybersecurity, defense technology, and energy infrastructure, as these areas may see accelerated spending [1]. Moving forward, the market remains focused on the finalization of the ceasefire agreement and the trajectory of US inflation data [1].
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AI-assisted synthesis by the TrendWatcher Editorial Desk · sourced from 3 outlets · Jun 3, 2026 · How we report
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