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Megacap tech and the AI trade power US stocks to fresh records

The S&P 500 rose 0.5%, the Nasdaq 100 was up 0.8%, and the Russell 2000 advanced 0.3% on Monday.

9/15/25 4:28PM

The Magnificent 7 and most stocks in the AI ecosystem (with the exception of Nvidia) did the lion’s work in propelling the S&P 500 and Nasdaq 100 to another day of record closing highs.

The benchmark US stock index rose 0.5%, the tech-heavy gauge was up 0.8%, and the Russell 2000 advanced 0.3% on Monday.

Communications services, tech, and consumer discretionary (the sectors home to the Magnificent 7) were the top-performing S&P 500 sector ETFs, while defensive sectors like consumer staples and healthcare were at the bottom of the leaderboard.

Gains on the day were led by Seagate Technology, which jumped 7.8% after Bank of America boosted its price target on the stock to $215 from $170. Western Digital shares were also up 4.8%. Corteva and J.M. Smucker were among the biggest decliners, falling 5.7% and 5.1%, respectively. Elsewhere…

Alphabet popped 4.5% to become the fourth company to surpass a $3 trillion market cap, joining Nvidia, Microsoft, and Apple.

Tesla jumped 3.6% after CEO Elon Musk disclosed a purchase of 2.57 million shares, worth over $1 billion, according to a new SEC filing.

CoreWeave climbed 7.6% after striking an agreement with Nvidia, which will purchase all of CoreWeave’s unused cloud computing capacity through April 2032.

Intel rose 2.9% after the chip giant trimmed its full-year operating expense forecast to $16.8 billion from $17 billion.

IonQ shares gained 6.3% after a wave of analyst price target hikes followed its Analyst Day event at the New York Stock Exchange on Friday.

Chinese EV maker Nio leapt 4.2% after announcing that deliveries of its ES8 SUV — priced to compete with Tesla’s Model Y — will begin this weekend.

Joby Aviation and Archer Aviation rose 0.8% and 4.5%, respectively, after Transportation Secretary Sean Duffy announced a new FAA pilot program to speed up “advanced air mobility” development.

Novo Nordisk edged up 1.4% after European regulators approved its diabetes pill for cardiovascular benefits as well.

Snap and Meta shook off early declines to close higher after President Trump hinted on Truth Social that a TikTok deal had been reached, with Treasury Secretary Scott Bessent later confirming the framework of an agreement had been achieved.

Alaska Air fell 6.7% after warning that Q3 profits will likely come in at the low end of its prior outlook.

Hims & Hers slipped 2.8% after FDA Commissioner Marty Makary called its February Super Bowl ad the “most overt” example of “brazen” online pharmacy marketing tactics.

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Nate Becker & Matt Phillips7h

Oil drops, yields fall, and stocks rise on reports the US has sent Iran a plan to end war

Oil, stock, and bond markets flipped as investors continued to digest the latest reports on a potential wind-down of the war in Iran, with The New York Times reporting that the US has sent Iran a 15-point plan to end the conflict.

Crude oil futures dropped sharply, from around $92 a barrel to about $88.50. Yields on two-year and 10-year Treasurys dropped, and the SPDR S&P 500 ETF shot up after-hours.

From the Times:

“The United States has sent Iran a 15-point plan to end the war in the Middle East, according to two officials briefed on the diplomacy, reflecting the Trump administration’s eagerness to find an offramp from the conflict as it grapples with its economic fallout.

It was unclear how widely the plan, delivered by way of Pakistan, had been shared among Iranian officials and whether Iran was likely to accept it as a basis for negotiations. Nor was it clear whether Israel, which has been bombing Iran together with the United States, was on board with the proposal.

But the delivery of the plan showed that the administration was ramping up efforts to conclude a war, now in its fourth week, that has drawn in several other countries.”

Some individual shares had outsized reactions to the news in the postmarket session. Gold miners Freeport-McMoRan and Newmont, which have been battered since the war started, rose. Ammonia maker CF Industries — which had risen on expectations of rising prices for fertilizer products linked to the closure of the Strait of Hormuz — fell.

US natural gas producers such as APA Corporation, EOG Resources, Devon Energy, and Diamondback Energy also declined after-hours.

The Times report also said that “for now, there is no indication that the war will let up imminently.”

United States Said to Have Sent Iran a Plan to End the Middle East War

Crude oil futures dropped sharply, from around $92 a barrel to about $88.50. Yields on two-year and 10-year Treasurys dropped, and the SPDR S&P 500 ETF shot up after-hours.

From the Times:

“The United States has sent Iran a 15-point plan to end the war in the Middle East, according to two officials briefed on the diplomacy, reflecting the Trump administration’s eagerness to find an offramp from the conflict as it grapples with its economic fallout.

It was unclear how widely the plan, delivered by way of Pakistan, had been shared among Iranian officials and whether Iran was likely to accept it as a basis for negotiations. Nor was it clear whether Israel, which has been bombing Iran together with the United States, was on board with the proposal.

But the delivery of the plan showed that the administration was ramping up efforts to conclude a war, now in its fourth week, that has drawn in several other countries.”

US natural gas producers such as APA Corporation, EOG Resources, Devon Energy, and Diamondback Energy also declined after-hours.

The Times report also said that “for now, there is no indication that the war will let up imminently.”

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Luke Kawa, Max Knoblauch8h

Tasha Matsumoto

Stocks close lower after fluctuating as traders digest war updates

Stocks pared steeper losses on hopes of US-Iran talks, but were unable to maintain gains on reports that the US is deploying 3,000 troops to the Middle East.

Matt Phillips9h

Amid Mideast conflict, investors cling to faith in the AI build-out

Data center build-out stocks showed impressive resilience to the slump that hit big indexes Tuesday.

In fact, construction companies, server system makers, fiber-optic technology stocks, and memory makers — all cornerstones of the AI trade — were having a pretty good day, suggesting the market sees the wave of AI construction continuing, war or no war.

Optical stocks seen as crucial to efficiently transmitting the flood of information AI data centers both produce and depend on were surging. Corning, Lumentum, Coherent, and Ciena Corp. ramped.

Server rack makers HP Enterprise and Dell jumped. Construction and engineering companies like Sterling Infrastructure, MasTec, and Comfort Systems USA, which have benefited from the growth in building data centers, posted solid gains.

Hard disk drive makers Seagate Technology Holdings and Western Digital were also positive, though other memory plays such as Sandisk and Micron were in the red.

It was an impressive display of positivity on a day when the S&P 500 (SPDR S&P 500 ETF) and the Nasdaq 100 (Invesco QQQ Trust) were both fluttering between positive and negative territory for completely understandable reasons.

After all, the 82nd Airborne is heading to the Middle East, suggesting the US is considering sending troops into Iran. US crude oil is back above $90 a barrel and climbing, as the Strait of Hormuz remains essentially shut.

Additionally, the problems in the private credit market continue, with major fund managers preventing investors from withdrawing all the money they would like to. We even had a weak auction for US two-year Treasury notes — investors seemed to think the offered yield might not be sufficient to offset inflation risks stirred up by the war — that sent short-term interest rates up sharply.

But apparently it will take more than all that for investors to worry that the AI build-out may be halted, delayed, or even just trimmed back.

Nate Becker13h

Stocks get a bump on CNN report that Iran is willing to listen to proposals to end war

Stocks got a small bump midday Tuesday as CNN reported on what appeared to be a softening in Iran’s position toward ending the war in the Middle East.

The S&P 500 briefly turned green following the report, before paring some of those gains in the afternoon.

From the CNN report:

“An Iranian source told CNN on Tuesday that there had been ‘outreach’ between the United States and Tehran and that Iran is willing to listen to ‘sustainable’ proposals to end the war.

‘There has been outreach between the United States and Iran, initiated by Washington, in recent days, but nothing that has reached the level of full-on negotiations,’ the source said. ‘Messages have been received through various intermediaries to scope out whether an agreement to end the war can be reached.’”

Markets had zoomed Monday as President Trump said there had been discussions between the two nations, but they gave back some of their gains after Iran starkly denied the claim. Markets seemed to read this new reporting as a softening of Iran’s position.

Iranian source says there has been US "outreach" and Tehran "willing to listen"

“An Iranian source told CNN on Tuesday that there had been ‘outreach’ between the United States and Tehran and that Iran is willing to listen to ‘sustainable’ proposals to end the war.

‘There has been outreach between the United States and Iran, initiated by Washington, in recent days, but nothing that has reached the level of full-on negotiations,’ the source said. ‘Messages have been received through various intermediaries to scope out whether an agreement to end the war can be reached.’”

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