Stock market today: S&P 500, Nasdaq, Dow edge lower as US-Iran tensions flare up again, shuttering Hormuz

Apr 20, 2026
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Updated 1 min read

US stocks fell on Monday after a chaotic weekend of events reignited US-Iran tensions, putting peace talks at risk and leaving investors bracing for more uncertainty.

The tech-heavy Nasdaq Composite (^IXIC) led losses, shedding 1%. The S&P 500 (^GSPC) and Dow Jones Industrial Average (^DJI) lost 0.6% and 0.3%, respectively.

The rapid escalation in tensions comes after the US Navy seized an Iranian ship, blowing a hole in its engine room, according to President Trump. For its part, Iran fired at vessels and abruptly stopped traffic in the Strait of Hormuz on Saturday, abandoning its promise to allow some to pass, as it said the US had broken a ceasefire deal.

Renewed concerns about oil supply disruptions in the critical waterway and revived worries about inflation suggested prospects for talks to end the war were clouded. The Hormuz standoff is just one of the several sticking points in US-Iran negotiations.

Oil prices jumped on Monday, but remained well below the key $100 level. US benchmark West Texas Intermediate crude futures (CL=F) were last up 5.7% to trade above $87 per barrel, while global benchmark Brent crude (BZ=F) popped 5.6% to cross $95.

Looking ahead for the week, investors will parse another busy stretch of earnings, with major names including Tesla (TSLA), Intel (INTC), and United Airlines (UAL) set to report in the days ahead, offering the next test for markets navigating record stock rises and increasing geopolitical risk.

LIVE 12 updates

  • This chart reveals the divide between Wall Street and Main Street

    There’s a major divide between how Wall Street investors and Main Street consumers feel about the US economy right now.

    Yahoo Finance’s Brian Sozzi reports:

    Read more here.

  • Jake Conley

    Eli Lilly set to acquire Kelonia Therapeutics for up to $7 billion

    Eli Lilly (LLY) will acquire the biotechnology firm Kelonia Therapeutics for up to $7 billion, the firms announced on Monday, giving Eli Lilly access to Kelonia’s gene therapies and other forms of cancer treatments.

    Eli Lilly shares lost roughly 0.4% on the news, after earlier gains on a report of a potential deal.

    Under the terms of the deal, shareholders in the privately held Kelonia will receive an up-front cash payment of $3.25 billion, with additional payouts dependent on certain clinical and commercial milestones.

    The acquisition will strengthen Eli Lilly’s existing cancer treatments portfolio, including its Jaypirca therapy and the breast cancer drug Verzenio, Reuters reported.

    The announcement on Monday morning caps off speculation that an acquisition was imminent. The Wall Street Journal reported earlier Monday morning that Eli Lilly could acquire Kelonia for more than $2 billion.

  • Jared Blikre

    Semis lead another wave of fresh highs

    Semiconductors are on a roll.

    The morning’s new-highs list is basically a chip map right now, with the semis index and a long lineup of semiconductor names pushing to fresh intraday records. Even high beta is riding shotgun as risk appetite stays pointed at tech.

    The stats are getting historic. The iShares Semiconductor ETF (SOXX) is now tracking 14 straight days of gains, its longest win streak since a 15-day run in June 2014. It’s also on pace for its best month ever — up about 25%, the biggest monthly gain since inception in July 2001. Meanwhile, the Philadelphia Semiconductor Index (^SOX) is tracking its best month since February 2000 (when it rose about 50%, roughly double the current pace).

    Here are this morning’s intraday record highs:

    Dow Jones Sectors/Industries: Electronic Equipment, Computer Hardware, Electronic & Electrical, Heavy Construction

    Industry/Style ETFs: Semiconductors (SOXX), S&P 500 High Beta (SPHB)

    Consumer discretionary stocks: eBay (EBAY), Ross Stores (ROST)

    Industrials stocks: Cummins (CMI), GE Vernova (GEV), Ichor (ICHR), Jabil (JBL), MKS Instruments (MKSI), Quanta Services (PWR)

    Real estate stocks: Digital Realty (DLR), Equinix (EQIX)

    Tech stocks: Analog Devices (ADI), Advanced Micro Devices (AMD), Arista Networks (ANET), ASE Technology (ASX), Cirrus Logic (CRUS), Dell (DELL), FormFactor (FORM), Hewlett Packard Enterprise (HPE), KLA (KLAC), Lattice Semiconductor (LSCC), Marvell (MRVL), MACOM (MTSI), Monolithic Power Systems (MPWR), Nova (NVMI), ONTO Innovation (ONTO), Photronics (PLAB), SiTime (SITM), Teradyne (TER), Texas Instruments (TXN), Ultra Clean (UCTT), Western Digital (WDC)

  • Jake Conley

    US stocks fall at the opening bell

    The US stock market opened slightly lower on Monday after a bevy of weekend headlines from the Middle East threw hopes for peace into disarray.

    The S&P 500 (^GSPC) and tech-heavy Nasdaq Composite (^IXIC) traded down by roughly 0.2% each. Meanwhile, the Dow Jones Industrial Average (^DJI) bounced around the flat line by less than 0.1% in each direction.

    In the oil market, US benchmark West Texas Intermediate crude futures (CL=F) gained 4.8% to trade around $86.50, while contracts on the global pricing benchmark, Brent crude (BZ=F), rose 4.2% to near $94.

    Tesla (TSLA), Intel (INTC), and United Airlines (UAL) will report earnings this week, among a basket of other names.

  • Treasurys fall on US-Iran tensions, ahead of Warsh hearing

    Treasury yields inched higher on Monday as US-Iran tensions ratcheted back up again over the weekend and investors awaited Kevin Warsh’s confirmation hearing in the Senate, which could offer clues about the future of Federal Reserve leadership and central bank independence.

    The 10-year yield (^TNX) drifted 2 basis points higher to 4.26%, while the longer-dated 30-year yield (^TYX) rose marginally to 4.89%.

    Treasurys fell after traffic through the Strait of Hormuz returned to a standstill over the weekend, raising inflation concerns yet again. Bond prices trade inversely to bond yields, meaning yields rise when bonds are being sold.

    Also weighing on bonds was the upcoming confirmation hearing for Kevin Warsh. Yahoo Finance’s Jennifer Schonberger previews what to expect:

    Read more here.

  • Sandisk joins Nasdaq 100, but it looks exposed to a pullback

    Sandisk (SNDK) stock joined the Nasdaq 100 (^NDX) after shares surged 287% year to date. The addition of Sandisk replaces software company Atlassian (TEAM) in the benchmark tech index.

    But the stock fell slightly on Monday morning. As my colleague Brian Sozzi pointed out this morning, the rise in shares of Sandisk and peer memory chip maker Micron (MU) has started to look bubble-like and could be ripe for a pullback.

    Sozzi writes:

    Read more here.

  • Psychedelic drug makers rally as Trump orders FDA to expedite reviews

    Shares of psychedelic drug developers rose in premarket trading after President Trump signed an executive ‌order directing health regulators to speed up reviews of psychedelic ‌drugs to treat serious mental illness.

    Shares of AtaiBeckley (ATAI) jumped 30% before the bell, while ​Definium Therapeutics (DFTX) rose 14%, and Compass Pathways (CMPS) climbed 24%. GH Research (GHRS) gained 17%, Enveric BioSciences (ENVB) shot up roughly 80%, and US‑listed shares of Cybin (HELP) were up about 14%.

    From Reuters:

    Read more here.

  • How Charlie Ergen’s SpaceX windfall could net billions

    Satellite cable pioneer Charlie Ergen made a big bet on spectrum and eventually found a buyer in SpaceX (SPAX.PVT). The stock portion of that deal could be huge.

    Yahoo Finance’s Pras Subramanian reports:

    Read more here.

  • Marvell stock rises on report of talks with Google

    Google (GOOG, GOOGL) is in talks with Marvell (MRVL) to ‌develop two new versions of its AI chips, The Information reported.

    One will be a new tensor processing unit (TSU) tailored to running AI workloads, per the report. The other will be a memory processing unit designed to work with those TSUs, and the partners are aiming to finish its design as soon as next year.

    Google has been positioning its TPU as a rival to Nvidia’s (NVDA) dominant GPUs amid a Big Tech data center buildout.

    Shares of Marvell jumped over 8% in premarket on the report.

  • Lilly nears $2 billion deal for cancer biotech Kelonia Therapeutics

    Eli Lilly (LLY) is in advanced talks to acquire biotech firm Kelonia ‌Therapeutics for more than $2 billion, The Wall ‌Street Journal reported.

    A deal could be agreed as soon as Monday, per WSJ sources, and could include additional payments if the blood-cancer biotech reaches key milestones, sources told the WSJ.

    Shares of the US drugmaker rose over 2% in premarket following the report on Sunday.

    Reuters reports:

  • Gold falls as Iran peace falters, approaches 10% loss since war began

    Bloomberg reports:

    Read more here.

  • Oil and natural gas rise as US navy intercepts Iranian tanker

    Bloomberg reports:

    Read more here.

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