S&P 500 Drops Amid Escalating US-Iran Tensions Threatening Regional Stability

US Stocks Stalled Amid Fears of Ceasefire Collapse

The US stock market rally came to a halt on Wednesday as investors grew concerned about the fragile ceasefire agreement between the US and Iran. The S&P 500 Index declined by 0.5% at 9:56 a.m. in New York, putting the gauge on track to snap a winning streak that currently ties the longest since 1995. The Nasdaq 100 Index also traded 0.5% lower.

The decline in the stock market comes as the US and Iran clashed again overnight in one of the most serious flareups since the ceasefire came into effect. Kuwait and Bahrain were caught in the crossfire, with the Islamic Republic targeting the US's main naval base in the region, located in Bahrain, and the Ali Al-Salem airbase in Kuwait. At least one person was killed in a separate strike at Kuwait's civilian airport.

The escalating tensions between Washington and Tehran have complicated matters, with President Donald Trump confirming that he had a heated exchange with Israeli Prime Minister Benjamin Netanyahu on a call this week as he tried to de-escalate the hostilities. The situation has raised concerns among investors, who may have been too quick to price in the impact from last week's promised Memorandum of Understanding between Iran and the US.

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Outside of the Middle East, investors are keeping an eye on the remaining slate of economic data due this week, particularly on labor. Initial jobless claims will be released on Thursday and the monthly employment report for May is due Friday. Investors will be assessing whether the current combination of strong earnings, resilient growth, and elevated inflation can continue.

AI Rally Remains on Track

Despite the decline in the stock market, the AI rally remains on track. Marvell Technology Inc. rose 2.35%, putting the stock on track to extend Tuesday's 33% rally. The semiconductor and networking company's surge comes after Nvidia Corp. Chief Executive Officer Jensen Huang predicted that the firm would be the next business to hit $1 trillion in valuation. The valuation will soar now that the age of "useful AI has arrived," Huang said Tuesday.

The pace of the rally has moderated, according to Capital.com's senior market analyst Daniela Hathorn. However, the "tension" between strong growth and persistent inflation continues to be a key driver. For now, risk appetite remains supported, but with stretched valuations and shifting monetary policy expectations, markets appear increasingly sensitive to any signs that the earnings and growth story may begin to soften.

Read also: US-Iran Tensions Spark Uptick in Oil Prices Amid Global Market Decline

Ned Davis Research strategists have boosted their price target for the S&P 500 to 7,950 points, with AI growth helping underpin their prediction. Strong earnings growth on AI-fueled margin expansion is key to the rally continuing, according to the firm's Ed Clissold and Thanh Nguyen.

In terms of other single-stock moves, Palo Alto Networks Inc. slipped despite releasing an adjusted earnings forecast that was stronger than expected. Macy's Inc. advanced after lifting its sales outlook for the year.