S&P 500, Nasdaq, Dow Futures Slip After Trump Warns Iran Of Fresh Strikes Over Hormuz Standoff: INTC, MLTX, SNDK, KEEL In Focus

U.S. stock futures fell in the overnight session late Sunday as renewed tensions between Washington and Tehran reignited concerns about the success of peace negotiations between the countries.

President Donald Trump threatened fresh strikes on Iran after Tehran closed the Strait of Hormuz over hostilities in Lebanon ahead of the first peace talks in Switzerland over the weekend.

Dow futures fell 0.12%, S&P 500 futures declined about 0.21%, and the Nasdaq 100 futures traded 0.22% lower as of 9.24 p.m ET. Meanwhile, oil prices inched higher.

The iShares 20+ Year Treasury Bond ETF (TLT) was trading down 0.31% amid ‘bullish’ sentiment at the time of writing.

U.S. markets were closed on Friday in observance of Juneteenth National Independence Day, commemorating the end of slavery in the country.

On Thursday, all three benchmark indexes closed higher amid optimism about the peace deal and a jump in the technology sector. The Dow, S&P 500, and Nasdaq Composite also ended the week in the green.

The Nasdaq Composite led the climb on Thursday, adding nearly 500 points to close up 1.91% higher. The Dow closed up 0.14% while the S&P 500 was up 1.08% at close.

Market sentiment weakened after Iran announced over the weekend that it was restricting traffic through the Strait of Hormuz again, citing continued Israeli military operations in Lebanon. Iran argued that Washington had failed to uphold commitments to curb hostilities in Lebanon.

However, tensions rose after President Trump threatened fresh military action against Iran. In a Truth Social post on Sunday, Trump said, “Iran must immediately stop their highly paid PROXIES in Lebanon from causing trouble. If they don’t, we’ll hit Iran very hard again, just like we did last week, only harder!!!” Earlier, Trump told Fox News that he warned Iranian officials that if the Strait was closed, “you won't have a country."

The developments coincided with the first round of talks under the interim peace deal, held in Switzerland, where U.S. negotiators led by Vice President JD Vance met Iranian officials to discuss strategies aimed at preserving the ceasefire, ensuring the Strait of Hormuz remains open, and laying the groundwork for future negotiations on Iran's nuclear program and sanctions relief. The talks concluded on Sunday after having been called off earlier.

Following the first day of talks, Iranian Foreign Ministry spokesperson Esmail Baghaei has reportedly said “discussions were held on the remaining clauses [of the MoU] that are necessary to begin final negotiations,” according to Al Jazeera.

Meanwhile, a new AP-NORC poll from last week found that 65% of Americans disapprove of President Donald Trump's handling of Iran, while 53% believe U.S. military action against Tehran has gone too far, and only 34% approve of his approach to Israel.