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<li>Futures down: Dow 0.58%, S&amp;P 500 0.52%, Nasdaq 0.57%</li>
</ul>
April 23 (Reuters) - Wall Street futures slipped early on Thursday, with investors hesitant to extend the recent equities rally in the absence of clearer signals on the U.S.-Iran war.
Iran seized two ships in the Strait of Hormuz and demanded that the U.S. lift its naval blockade, which remains in effect even after President Donald Trump extended the ceasefire indefinitely.
Investors keen to look past war-related risks have shown strong resilience in recent days, but some fatigue has set in, leading to brief episodes of risk aversion as they await a clearer sense of how the conflict may ultimately be resolved.
With oil prices over $100 a barrel, the risk of an inflation flare-up also remains.
“Even in the event that the Middle East conflict eases and shipping resumes as usual through the Strait of Hormuz, it would likely take time for the global economy to normalize after one of the largest oil supply disruptions in decades,” said PIMCO economist Tiffany Wilding.
At 4:56 a.m. ET, Dow E-minis (YMcv1) fell 289 points, or 0.58%, S&amp;P 500 E-minis (EScv1) slipped 37.5 points, or 0.52%, and Nasdaq 100 E-minis (NQcv1) were down 153.5 points, or 0.57%.
<h3>PACKED EARNINGS CALENDAR IN FOCUS</h3>
The earnings season has been largely strong so far, but because the results reflect only one month of disruption from the Middle East conflict, investors are questioning how dependable they are as a gauge of what lies ahead.
Tesla (TSLA.O) shares fell 2.9% in the premarket session, after it raised its spending plan to more than $25 billion for the year.
The company is in the middle of one of the most expensive bets in its history as CEO Elon Musk channels funds into artificial intelligence, robotics and chips.
“With all the focus on the war, a forgotten theme that weighed on the market at the start of the year is artificial intelligence overinvestment and diminishing future returns,” said Kyle Rodda, senior financial market analyst for Capital.com.
IBM (IBM.N) fell 7.3% after revenue growth slowed in the first quarter on weakness in its software business. Texas Instruments (TXN.O) rose 10.3% after forecasting second-quarter revenue and profit above Wall Street expectations.
Honeywell (HON.O) was up marginally ahead of results, while chemicals maker Dow (DOW.N) fell 2.8%.
American Airlines (AAL.O) , American Express (AXP.N) and Comcast (CMCSA.O) are among the other companies due to report on Thursday amid a crowded earnings slate.
U.S. ​weekly initial jobless claims and manufacturing activity data scheduled to be released later on Thursday will also be scrutinized for clues on the impact of higher energy prices due to the war.

Trump pulled a last-minute reversal, announcing an extension of the ceasefire and maintaining the naval blockade pending a proposal from Iran. Iranian media reported that Iran formally refused to attend the US-Iran talks on the 22nd, and the White House stated that Vance and the US delegation canceled their trip to Pakistan, leaving the future arrangements of the negotiations uncertain. Do you think Iran will compromise first, or will Trump give in first? Feel free to share your thoughts in the comments!

Trump pulled a last-minute reversal, announcing an extension of the ceasefire and maintaining the naval blockade pending a proposal from Iran. Iranian media reported that Iran formally refused to attend the US-Iran talks on the 22nd, and the White House stated that Vance and the US delegation canceled their trip to Pakistan, leaving the future arrangements of the negotiations uncertain. Do you think Iran will compromise first, or will Trump give in first? Feel free to share your thoughts in the comments!

With US-Iran negotiations deadlocked, how long can the ceasefire last?

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- U.S. stock futures declined early on April 23, with Dow down 0.58%, S&P 500 down 0.52%, and Nasdaq down 0.57%, as investors awaited clarity on the U.S.-Iran conflict.  
- Iran's recent seizure of two ships heightened tensions, and with oil prices exceeding $100 a barrel, concerns about inflation persisted.  
- The upcoming earnings reports and economic data on jobless claims and manufacturing are anticipated to provide further insight into the market's response to the ongoing geopolitical risks.

US STOCKS-Wall St futures slip as investors pause for clarity on US-Iran war