<div id="readability-page-1" class="page"><div> The S&amp;P 500 (SNPINDEX:^GSPC) fell 0.24% to 7,109.14, the Nasdaq Composite (NASDAQINDEX:^IXIC) slipped 0.26% to 24,404.39, and the Dow Jones Industrial Average (DJINDICES:^DJI) edged down 0.01% to 49,442.56 as optimism about U.S.-Iran conflict de-escalation faltered.<h2 id="market-movers">Market movers</h2>WTI crude jumped almost 6% to close at $88.85 per barrel, causing energy names to climb while travel stocks fell. American Airlines (NASDAQ:AAL) fell after it rejected a merger approach from United Airlines (NASDAQ:UAL) on Friday. In tech, Atlassian (NASDAQ:TEAM) rallied after falling by almost 65% in the past year, potentially as investors look for opportunities. AST SpaceMobile (NASDAQ:ASTS) slumped after a flawed satellite launch.Apple (NASDAQ:AAPL) fell in after-hours trading on news that CEO Tim Cook would step down in September. Marvell Technology (NASDAQ:MRVL) gained on reports of a possible artificial intelligence (AI) chip deal with Alphabet (NASDAQ:GOOG).<h2 id="what-this-means-for-investors">What this means for investors</h2>After last week’s new highs, markets lost steam today on concerns of renewed tensions in the Middle East. The current U.S.-Iran ceasefire is set to end on Wednesday evening, and further headline-driven volatility is likely. Transit through the crucial Strait of Hormuz remains heavily restricted, despite Friday’s brief hopes of a reopening. Some economists fear a prolonged disruption to the oil supply could slow global growth. Wall Street will be watching upcoming earnings from heavyweights for signs that high energy prices are squeezing margins. Tesla (NASDAQ:TSLA), UnitedHealth (NYSE:UNH), GE Aerospace (NYSE:GE), and AT&amp;T (NYSE:T) are all due to report this week. <h2>Should you buy stock in S&amp;P 500 Index right now?</h2> Before you buy stock in S&amp;P 500 Index, consider this: The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and S&amp;P 500 Index wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years. Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $524,786!* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,236,406!* Now, it’s worth noting Stock Advisor’s total average return is 994% — a market-crushing outperformance compared to 199% for the S&amp;P 500. Don't miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors. See the 10 stocks » *Stock Advisor returns as of April 20, 2026. Emma Newbery has positions in Apple and Atlassian. The Motley Fool has positions in and recommends AST SpaceMobile, Alphabet, Apple, Atlassian, GE Aerospace, Marvell Technology, and Tesla and is short shares of Apple. The Motley Fool recommends UnitedHealth Group. The Motley Fool has a disclosure policy. The views and opinions expressed herein are the views and opinions of the author and do not necessarily reflect those of Nasdaq, Inc. </div></div>

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The S&P 500 fell 0.24% to 7,109.14, while the Nasdaq Composite and Dow Jones also declined amid faltering optimism over U.S.-Iran tensions. WTI crude oil surged nearly 6% to $88.85 per barrel, boosting energy stocks but negatively impacting travel stocks like American Airlines. Notable movements included Atlassian's recovery and Apple's drop following CEO Tim Cook's resignation announcement. Investors are cautious as the U.S.-Iran ceasefire nears its end, with potential implications for oil supply and global growth. Upcoming earnings reports from major companies will be closely monitored for impact on market margins.

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Pro Ultr Bloomberg Crude Oil

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iShares US Oil Equip & Svcs

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iShares US Oil & Gas Expl & Prod

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Apple

Marvell Tech

Alphabet - C

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Stock Market Today, April 20: Market Rebound Stumbles as Oil Disruption Continues